Results from individual detrital zircon samples

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Appendix 2
Results from individual detrital zircon samples
When possible, some grains were targeted for multiple analyses. This tactic was used to
detect any possible age differences between rim and core domains of selected grains. Only two
grains yielded statistically different ages between rim and core areas. One of these grains was in
sample KSH-11-05 and had a core age of 1336 ± 36 Ma with a rim age of 1226 ± 68 Ma
(analyses jl24b66 and jl24b68 in Table 2.1). The other grain was in sample KSH-11-08 and had
a core age of 1663 ± 89 Ma with a rim age of 1155 ± 58 Ma (analyses jl25b32 and jl25b35 in
Table 2.1; see also Fig. 3C insert). In this case, each age was treated as a separate analysis and
was included in the histogram plot for its respective sample. When a rim and core yielded the
same age, the more precise analysis was chosen to be included in the histogram plot for the
sample. Morphological characteristics and internal zoning patterns (where present) can be seen
in SEM images of analyzed grains presented in the North Carolina State University dissertation
by Hughes (2014).
Potomac Terrane
Sample KSH-11-01, Mine Run Complex Unit III
Sample KSH-11-01 (38.38958N, 77.76225W; Fig. 3A) is from Unit III of the Mine Run
Complex (Pavlides 1989). This quartzite was taken from an outcrop on the Rapidan River where
graded bedding can be seen and, along with a parallel foliation, is openly folded (~90° interlimb
angle). The rock contains mostly fine- to medium-grained quartz grains along with fine-grained
muscovite that defines the foliation; accessory minerals include biotite, magnetite, and zircon.
Of the 111 acceptable analyses performed for this sample, 96 are reported as concordia
age and 15 are reported as 206Pb/238U age (Table 2.1). Most zircon grains are Mesoproterozoic
(Fig. 4A); peak modes occur as two pulses in the Stenian at 1.01 Ga and 1.11 Ga. The two oldest
zircon grains crystallized in the Neoarchean at ca. 2.55 Ga and ca. 2.72 Ga. Twelve of the 14
zircon grains younger than the Mesoproterozoic are all 900+ Ma; however, most of these have
2σ errors that overlap with the Mesoproterozoic. The maximum age of deposition for this
sample is constrained by the two youngest zircon grains which have concordia ages (2σ) of 551
± 19 Ma and 554 ± 34 Ma.
Sample KSH-11-05, Mine Run Complex Unit I
Sample KSH-11-05 (38.30957N, 77.73648W; Fig. 3B) is from Unit I of the Mine Run
Complex (Pavlides 1989). It was taken from a unit reference outcrop (outcrop P-77-34 in
Pavlides 1989) along Wilderness Run just downstream of the Wilderness Run Lake dam. It is a
poorly sorted metagreywacke composed of sub-angular to sub-rounded polycrystalline quartz
grains and lesser feldspar grains. In a few places, this matrix contains larger clasts of identical
composition. This outcrop is the same as Stop 1 described in a Wilderness area field guide
(Terblanche and Nance 2012) and Stop 1-6 in another field trip guide (Hughes et al. 2014).
From 108 acceptable analyses, 82 are reported as concordia ages and 26 are reported
206
Pb/238U ages (Table 2.1). Most zircon in this sample is Mesoproterozoic (Fig. 4B); the peak
mode occurs at 1.21 Ga and the histogram pattern is asymmetrically skewed toward younger,
Neoproterozoic ages. There are only five zircon grains that are 1.40 Ga or older and the oldest
zircon was dated at c. 1.78 Ga. The youngest zircon has a crystallization age (2σ) of 499 ± 15
/238 concordancy at 99% and 206/238 concordancy at 94%). This single Late
Ma ( 206
207
207
/235
/206
Cambrian zircon provides a maximum possible age of deposition for this sample and is the
youngest detrital zircon analyzed from the Mine Run Complex.
Sample KSH-11-08, Mine Run Complex Unit IV
Sample KSH-11-08 (37.99697N, 78.11893W; Fig. 3C) was taken from an outcrop of
Unit IV of the Mine Run Complex (Rossman 1991; Hughes 2011) along the South Anna River.
This rock is a feldspathic quartzite composed mostly of fine- to medium-grained polycrystalline
quartz grains and fine-grained feldspar grains. Elongate quartz grains define a weak foliation
that is enhanced by fine-grained muscovite. The sampled rock occurs as a small quartzite lens
within fine-grained muscovite-rich phyllite. Faint graded bedding is present and in the coarsest
beds, physical weathering has produced a pot-marked texture along the outcrop surface.
There are 113 acceptable analyses for this sample; these are reported as 84 concordia
ages, 28 206Pb/238U ages, and one 207Pb/206Pb age (Table 2.1). Most of these ages are
Mesoproterozoic (Fig. 4C); peak modes occur in two pulses at 1.01 Ga and 1.14 Ga. Of four
zircon grains older than Mesoproterozoic, three have Paleoproterozoic ages of ca. 1.665 Ga and
one has a Paleoarchean age of 3.35 ± 0.02 Ga, the oldest zircon analyzed in this study. The
youngest zircon in the sample is a lone Neoproterozoic, 753 ± 41 Ma grain that has a Th/U ratio
of 0.020, which possibly reflects a metamorphic origin (e.g. Williams and Claesson 1987;
Williams et al. 1996; Rubatto 2002; Hoskin and Schaltegger 2003). The youngest grain with a
Th/U ratio >0.1 is a c. 910 Ma grain. Although collected proximal to the contact with the
intrusive Ordovician–Silurian Green Springs complex, no grains have ages that would correlate
to contact metamorphic zircon growth at any time in the Paleozoic.
Sample P310-04, Mine Run Complex Unit I
Sample P310-04 (38.35749N, 77.68502W; Fig. 3D) is from Unit I of the Mine Run
Complex (Pavlides 1989). It was taken from an outcrop near Eley’s Ford on the Rapidan River.
This location is proximal to a previously mapped ‘exotic volcanic block’ in the Mine Run
Complex (Pavlides 1989; Mixon et al. 2000) and was sampled to evaluate the hypothesis that
such blocks were derived from the Middle Ordovician Chopawamsic arc. Although most of the
rock present in outcrop is phyllite and metasiltstone, the area sampled was a lens of mediumgrained metagreywacke composed mostly of quartz, feldspar, and muscovite. In places, quartz
pebbles are distinctly blue. Graded bedding is evident in a few places and indicates stratigraphic
younging to the SE. This outcrop is the same as Stop 4 that is described in a Wilderness area
field guide (Terblanche and Nance 2012) and Stop 1-7 in a subsequent field guide (Hughes et al.
2014).
From this sample, 53 analyses are statistically acceptable (Table 2.1) with a total of 15
concordia ages and 38 206Pb/238U ages considered. Peak modes occur at 1.04 Ga and 1.15 Ga and
there is no zircon from any source older than Mesoproterozoic (Fig. 4D). The youngest zircon
has a poorly constrained 206Pb/238U age of 905 Ma with an uncertainty (2σ) of ±70 Ma. No
zircon grains were found to be similar in age to the Middle Ordovician Chopawamsic arc and
detailed mapping (Terblanche, 2013) performed between collecting and analyzing this sample
revealed that the nearby ‘exotic volcanic block’ is actually part of the Chopawamsic Formation.
Sample KSH-11-18, Lunga Reservoir Formation
Sample KSH-11-18 (38.50487N, 77.43166W; (Fig. 3E) was taken from a small
abandoned quarry site along Beaver Dam Run on Marine Corps Base Quantico. This location is
one of the reference locations used to define the Lunga Reservoir Formation (P-72-6 of Pavlides
1989). The rock is a poorly sorted metagreywacke that includes mostly fine- to medium-grained
quartz, feldspar, and muscovite as well as pebbles of mafic schist and polycrystalline quartz.
This location is also Stop 2 and Stop 2-2 in field trip guides (Pavlides 1976; Hughes et al. 2014).
One hundred analyses are acceptable for this sample (Table 2.1). Of those, 90 are
concordia ages and 10 are 206Pb/238U ages. Most ages are Mesoproterozoic and peak modes are
at 1.10 Ga and 1.28 Ga (Fig. 4E). Considerable detritus is also present from sources with
crystallization ages of ca. 935 Ma and ca. 1.45 Ga. There are only three zircon grains older than
Mesoproterozoic and the oldest has a poorly constrained Neoarchean age of ca. 2.55 Ga. The
youngest zircon present has a concordia age (2σ) of 569 ± 21 Ma.
Sample KSH-11-16, Lunga Reservoir Formation
Sample KSH-11-16 (38.48978N, 77.46853W) is from the Lunga Reservoir Formation
metadiamictite and was sampled from near Aquia Creek at a reference location for the formation
(P-71-63 of Pavlides 1989). The rock was called a “biotite-chlorite-muscovite-plagioclasequartz granofels (schist-chip feldspathic metagreywacke)” by Pavlides (1989).
One hundred and twenty-two analyses are acceptable for this sample. Of those, 22 are
concordia ages, 95 are 206Pb/238U ages, and five are 207Pb/206Pb ages (Table 2.1). Most ages in
this sample are Mesoproterozoic with peak modes at 1.02–1.12 Ga, 1.31 Ga, and 1.43 Ga (Fig.
4F). The two youngest zircon grains in this sample have crystallization ages (2σ) of 500 ± 18
and 527 ± 11 Ma. These are the youngest zircon grains analyzed from the Lunga Reservoir
Formation and are within error of the youngest zircon analyzed in the Mine Run Complex (ca.
499 Ma, sample KSH-11-05).
Chopawamsic Terrane
Sample KSH-11-19, Chopawamsic Formation
Sample KSH-11-19 (38.53449N, 77.38839W; Fig. 3G) was taken from the type section
(Southwick et al. 1971) of the Chopawamsic Formation along Chopawamsic Creek on Marine
Corps Base Quantico. It is a medium-grained micaceous quartzite in a zone ~250 metres
downstream from the Breckenridge Reservoir dam that has been documented to display the best
preserved sedimentary features (Southwick et al. 1971) in the type section. Our sample contains
mostly subangular to subrounded quartz pebbles with additional biotite, muscovite, and feldspar;
pyrite is also ubiquitous.
The total acceptable analyses from this sample include 24 concordia ages and one
206
Pb/238U age (Table 2.1). The total number of zircon grains reported here is much lower than
the desired amount (~90+) due to the paucity of zircon in the rock. Nonetheless, the analyses are
reported due to the location of the sample along the type section for the Chopawamsic
Formation. All 25 analyses plot as part of one population with a Middle Ordovician age of ca.
470 Ma (Fig. 4G). Due to the temporal coincidence of all ages within analytical uncertainty
(2σ), we do not consider the youngest or oldest grains to be statistically distinct from 470 Ma.
Sample KSH-11-28, Chopawamsic Formation
Sample KSH-11-28 (38.12930N, 77.85023W; Fig. 3H) was taken from the Chopawamsic
Formation along the north shore of Lake Anna. The sandy matrix of this sample is made up of
sub-equal amounts of fine-grained quartz + feldspar + biotite. Interspersed medium-grained
pebbles of feldspar and quartz have a well rounded appearance in hand sample and thin section.
Garnet is also present in moderate amounts.
Sixty-eight analyses are acceptable for this sample, including 66 concordia ages and two
206
Pb/238U ages (Table 2.1). Most ages are Late Cambrian to Ordovician with the main peak
mode occurring at ca. 457 Ma (Fig. 4H). This age also serves as the youngest population present
in the sample. Zircon with poorly constrained Early–Middle Cambrian and Neoproterozoic ages
is also present. The oldest zircon grains are a set of five Mesoproterozoic grains with a group of
three clustered around ca. 1.01 Ga and the oldest grain dated at c. 1.14 Ga.
Sample KSH-11-39, Chopawamsic Formation
Sample KSH-11-39 (37.95398N, 78.00282W; Fig. 3I) was taken from the Chopawamsic
Formation along the South Anna River (Hughes 2011). This rock is a metasandstone with
plentiful medium-grained rounded quartz and feldspar grains in a fine-grained quartz + feldspar
+ biotite matrix. 1–5 mm thick layers of biotite-rich zones are also common.
For this sample, all 97 acceptable ages are concordia ages (Table 2.1). Almost all zircon
grains are Ordovician with a main peak mode at c. 458 Ma (Fig. 4I). The sample also includes
eight grains that span the Cambrian period in addition to one c. 575 Ma Neoproterozoic grain
and one c. 1.17 Ga Mesoproterozoic grain.
Sample KSH-12-70, Chopawamsic Formation
Sample KSH-12-70 (38.48899N, 77.41918W; Fig. 3J) was taken from the Chopawamsic
Formation along an unnamed southern tributary to Smith Reservoir (Aquia Creek). This rock is
a recrystallized quartzite with mostly fine- to medium-grained quartz as well as considerable
pyrite.
Thirty-eight analyses are acceptable for this sample. Three analyses are reported as
206
Pb/238U ages and the remainder are concordia ages (Table 2.1). All but one analysis cluster for
a peak age of ca. 476 Ma (Fig. 4J). A single older zircon has a Mesoproterozoic age of ca. 1.09
Ga.
Arvonia Successor Basin
Sample BREMO, Bremo Quartzite Member, Arvonia Formation
Sample BREMO (37.71290N, 78.30061W; Fig. 3K) was taken from the Bremo quartzite
Member of the Arvonia Formation at Bremo Bluff along the north shore of the James River. The
rock is a medium-grained quartzite that locally displays cross-bedding structures which indicate
stratigraphic younging towards the west.
Eighty-four acceptable analyses are reported for this sample. Of these, 44 are concordia
ages and 40 are 206Pb/238U ages (Table 2.1). The data are strongly bimodal with ~75% of grains
being latest Paleoproterozoic to earliest Neoproterozoic. The bulk of this group is
Mesoproterozoic and displays a peak mode at ca. 1.01 Ga (Fig. 4K). The oldest zircon analyzed
has an age of ca. 1.68 Ga. The remainder of the zircon analyzed crystallized in the Ordovician or
Silurian; this group has a peak mode at ca. 452 Ma. The extreme bimodality of the sample is
prominent with no zircon between the ages of ca. 488 and ca. 924 Ma. The youngest zircon
analyzed yields an age of 407 ± 10 Ma but is not reported as detrital zircon due to an
anomalously low Th/U ratio of 0.068; this value suggests the Early Devonian age may be more
representative of zircon growth during metamorphism (e.g. Williams and Claesson 1987;
Williams et al. 1996; Rubatto 2002; Hoskin and Schaltegger 2003). The youngest zircon of
interpreted igneous origin has a concordia age (2σ) of 415 ± 34 Ma – an age that is very close,
within error, to the peak mode of the Ordovician–Silurian population.
Sample KSH-11-BUF, Buffards Formation, Arvonia Basin
Sample KSH-11-BUF (37.65385N, 78.36009W; Fig. 3L) was taken from the Buffards
Formation (Brown 1969) along Volcano Ln., south of the town of Arvonia. Although there is a
spectacular metaconglomerate zone in this outcrop, we sampled an area with a more consistent
micaceous pebbly metagreywacke matrix and fewer large volcanic clasts. This strategy was
employed in order to avoid a skewed representation of zircon ages which a collection of large
volcanic clasts could create. Well rounded pebbles in the micaceous metagreywacke are most
commonly a mix of ~1 cm diameter sized “blue” and clear quartz. This site is also Stop 5 of an
Owens (2010) field trip guide and stop 2-6 of a Bailey and Owens (2012) field trip guide.
For this sample, 90 of 94 acceptable analyses are concordia ages; the remaining four are
206
Pb/238U ages (Table 2.1). Over 75% of the grains reported are Ordovician or younger. The
remainder of the grains (n = 19) are Mesoproterozoic (within 2σ uncertainties). The oldest two
zircon grains present have an age of ca. 1.63 Ga. The peak mode of the sample is Early Silurian
at ca. 430 Ma (Fig. 4L). No grains have ages that are statistically younger than this mode;
therefore it is also interpreted to be the age of youngest zircon delivered to the sample.
Storck Area
Sample KSH-11-40, Storck micaceous quartzite
Sample KSH-11-40 (38.41893N, 77.63665W; Fig. 3M) was taken from a sequence of
metasedimentary rocks previously interpreted to be equivalent to the Arvonia and Quantico
formations (Pavlides 1990; Mixon et al. 2000). We informally refer to this mature, well sorted,
very fine-grained muscovite quartzite unit and associated phyllite as the “Storck rocks.”
Muscovite folia are tightly spaced (~1–2 mm) and pervasive throughout the rock. This outcrop
is the same as Stop 5 in a Storck area field trip guide (Terblanche and Nance 2012).
One-hundred and six concordia ages are reported with one 207Pb/206Pb age for a total of
107 acceptable analyses (Table 2.1). Among all samples analyzed in this study, KSH-11-40
displays the most variability in detrital ages. Almost all grains are Proterozoic with only five
younger, Cambrian, zircon grains present; the youngest of these has a concordia age (2σ) of 504
± 36 Ma. Peak modes occur at 533 Ma, 607 Ma, 978 Ma, 1.15 Ga, and 1.33 Ga (Fig. 4M).
There is considerable input from populations that span all of these modes with few gaps in
analytical error apparent. The largest gap present is at the Mesoproterozoic–Paleoproterozoic
boundary between grains dated at ca. 1.53 – ca. 1.71 Ga. The Paleoproterozoic population
includes 18 of the grains analyzed and the oldest zircon of this set crystallized at ca. 2.31 Ga.
Table 2.1: For an excel spreadsheet of the data below, please contact Stephen Hughes ([email protected] Underlined values indicate
possibly unacceptable values.
Sample P-310-4:
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
±1σ
Rho
Pb
206
Pb
207
±1σ
235
Pb
U
±1σ
( M a)
206
Pb
238
U
±1σ
( M a)
207
Pb
206
Pb ( M a) Pb / Pb ag e ±2 σ ( M a)
±1σ
U / Pb
C o nco r d ia
( a)
(b)
M SWD Prob.
(of conc.)
( c)
232
Th 238 U
(ppm) (ppm) Th/U
Age used Age ±2σ (Ma)
(d)
(e)
Sample P-310-4 (38.35749° N, 77.68502°W)
my26b05
2.014616
0.227639
0.189729
0.012856 0.299833 0.071443 0.002945
1120
77
1120
70
970
84
115
1120
117
0.00
1.00
my26b06
2.762002
0.312829
0.221498
0.015734 0.313585
0.080810
0.002418
1345
84
1290
83
1217
59
106
1316
137
0.32
0.57
my26b07
4.019184
0.171279
0.270981 0.007567 0.327643 0.091293
0.001652
1638
35
1546
38
1453
34
106
1596
60
4.67
0 .0 3
my26b08
3.188444
0.193392
0.243149 0.006839 0.231863
0.085439 0.002053
1454
47
1403
35
1326
47
106
1419
63
0.96
0 .3 3
my26b09
2.768097
0.181461
0.200310
0.007017 0.267193
0.086711 0.002416
1347
49
1177
38
1354
54
87
1222
69
9.43
0 .0 0
my26b10
1.714736
0.250370
0.181194
0.011444
0.091511
0.003817
1014
94
1073
62
1457
79
74
1057
112
0.36
0.55
my26b15
2.063962
0.155375
0.173514
0.006454 0.247048 0.079705 0.002420
1137
51
1031
35
1190
60
87
1056
66
3.50
0 .0 6
my26b18
1.939913
0.127486
0.163134
0.005860
0.273311 0.077864 0.001726
1095
44
974
32
1143
44
85
1005
60
6.21
0 .0 1
my26b19
1.754916
0.057678
0.150642
0.004101
0.414133
1029
21
905
23
991
17
91
969
38
0.216282
0.072168 0.000597
26.37 0 .0 0
my26b20
2.662962
0.119348
0.205786 0.004883 0.264701 0.081837
0.001556
1318
33
1206
26
1242
37
97
1240
47
9.05
0 .0 0
my26b22
2.746981
0.122316
0.235137
0.001780
1341
33
1361
38
1249
42
109
1349
58
0.24
0.62
my26b25
2.084163
0.156164
0.178073 0.008326
0.002318
1144
51
1056
46
1019
64
104
1089
79
2.27
my26b26
2.603264
0.072955
0.198971 0.004502 0.403686 0.077868 0.001017
1302
21
1170
24
1144
26
102
1247
38
my26b27
2.405376
0.156459
0.199078 0.007373 0.284679 0.085650 0.002239
1244
47
1170
40
1330
51
88
1197
69
0.007291 0.348201 0.082126
0.312011
0.073182
0 .13
28.27 0 .0 0
1.97
0 .16
my26b30
2.326565
0.103913
0.182182
0.006435 0.395389 0.079336 0.000786
1220
32
1079
35
1181
20
91
1154
57
14.46
0 .0 0
my26b31
2.475478
0.169672
0.205329 0.005797 0.205941 0.087109 0.002306
1265
50
1204
31
1363
51
88
1217
57
1.29
0 .2 6
my26b32
2.513982
0.111519
0.213221
0.005912 0.312503
0.082400 0.001361
1276
32
1246
31
1255
32
99
1260
52
0.65
0 .4 2
my26b35
2.088472
0.072975
0.192344 0.005636 0.419262
0.077108 0.000804
1145
24
1134
30
1124
21
101
1142
45
0.13
0.71
my26b36
2.176952
0.103479
0.193515
0.006028 0.327640 0.078975 0.001544
1174
33
1140
33
1172
39
97
1156
54
0.76
0 .3 8
my26b37
2.283060
0.091037
0.205514
0.006188 0.377580 0.077890 0.001094
1207
28
1205
33
1144
28
105
1206
50
0.00
0.95
my26b38
2.578253
0.106498
0.230045
0.005718 0.300898 0.083668 0.001498
1294
30
1335
30
1285
35
104
1314
48
1.29
0 .2 6
my26b40
2.453063
0.156171
0.229556
0.009198 0.314708
0.083547 0.002247
1258
46
1332
48
1282
52
104
1291
75
1.81
0 .18
my26b41
2.453852
0.067324 0.220527 0.003385 0.279728
0.081166 0.000765
1259
20
1285
18
1225
19
105
1273
30
1.34
0 .2 5
my26b42
1.743986
0.104491
0.169938 0.006794 0.333628 0.071255
0.001662
1025
39
1012
37
965
48
105
1018
62
0.09
0.76
my26b45
2.385052
0.166003
0.225694
0.010295 0.327678 0.082562 0.001922
1238
50
1312
54
1259
46
104
1269
83
1.51
0 .2 2
my26b49
1.892863
0.066968
0.178220 0.004429
0.074776 0.001047
1079
24
1057
24
1062
28
100
1068
39
0.61
0 .4 3
my26b55
2.566265
0.151793
0.221402 0.006882 0.262748 0.083442 0.001976
1291
43
1289
36
1280
46
101
1290
62
0.00
0.97
my26b57
1.777614
0.079738
0.166990 0.005330 0.355775 0.071946
0.001146
1037
29
996
29
984
32
101
1016
49
1.57
0 .2 1
my26b58
1.768008
0.100013
0.161741 0.004236 0.231488
0.077101 0.001982
1034
37
966
24
1124
51
86
981
44
2.91
0 .0 9
0.351192
Not reported
for this sample
co nco rdia
112 0
117
co nco rdia
13 16
13 7
77
206
P b/ 238U
15 4 6
206
P b/ 238U
14 0 3
71
206
P b/ 238U
117 7
75
co nco rdia
10 5 7
112
206
P b/ 238U
10 3 1
71
206
P b/ 238U
974
65
206
P b/ 238U
905
46
206
P b/ 238U
12 0 6
52
co nco rdia
13 4 9
58
206
P b/ 238U
10 5 6
91
206
P b/ 238U
117 0
48
206
P b/ 238U
117 0
79
206
P b/ 238U
10 7 9
70
206
P b/ 238U
12 0 4
62
206
P b/ 238U
12 4 6
63
co nco rdia
114 2
45
206
P b/ 238U
114 0
65
co nco rdia
12 0 6
50
206
P b/ 238U
13 3 5
60
206
P b/ 238U
13 3 2
96
206
P b/ 238U
12 8 5
36
co nco rdia
10 18
62
206
P b/ 238U
13 12
10 8
206
P b/ 238U
10 5 7
48
co nco rdia
12 9 0
62
206
P b/ 238U
996
59
206
P b/ 238U
966
47
Sample P-310-4 continued:
my26b60
3.163417
0.145195
0.252561 0.007133 0.307681 0.090832 0.001385
1448
35
1452
37
1443
29
101
1450
58
0.01
0.94
my26b61
1.708081
0.046510
0.161550
0.003675 0.417683
0.073886 0.000629
1012
17
965
20
1038
17
93
994
32
5.02
0 .0 2
my26b62
2.441934
0.104478
0.216272
0.005114
0.082112
0.001215
1255
31
1262
27
1248
29
101
1259
46
0.04
0.84
my26b65
1.788118
0.059025
0.169534 0.003987 0.356261 0.072681 0.000954
1041
21
1010
22
1005
27
100
1026
36
1.63
0 .2 0
0.276333
co nco rdia
206
14 5 0
58
P b/ 238U
965
41
co nco rdia
12 5 9
46
206
P b/ 238U
10 10
44
206
P b/ 238U
115 1
65
my26b66
2.270035
0.081894
0.195527 0.006066 0.429953 0.079564 0.001104
1203
25
1151
33
1186
27
97
1187
48
2.68
0 .10
my26b67
1.772910
0.116158
0.169414
0.008684
0.077550 0.000737
1036
43
1009
48
1135
19
89
1025
75
0.28
0.59
co nco rdia
10 2 5
75
my26b68
1.637321
0.189761
0.164013
0.009466 0.248981 0.088235 0.001866
985
73
979
52
1388
41
71
981
94
0.01
0.94
co nco rdia
981
94
my26b69
1.652902
0.038601
0.162269 0.002773 0.365920 0.072304 0.000512
991
15
969
15
995
14
97
981
25
1.56
0 .2 1
31
my26b70
2.260748
0.089195
0.197070 0.005703 0.366775 0.084403 0.000915
1200
28
1160
31
1302
21
89
1182
49
1.50
0 .2 2
my26b71
1.969198
0.094118
0.184155
1105
32
1090
34
1280
25
85
1098
54
0.17
0.68
my26b72
2.119140
0.064540
0.185971 0.004336 0.382775 0.078489 0.000736
1155
21
1100
24
1159
19
95
1131
37
4.96
0 .0 3
my26b75
2.242006
0.071501
0.197823 0.005378 0.426248 0.079359 0.000782
1194
22
1164
29
1181
19
99
1185
42
1.20
0 .2 7
my26b76
3.504890
0.173093
0.253984 0.008053
0.001124
1528
39
1459
41
1708
20
85
1495
66
2.16
0 .14
my26b78
2.305931 0.120858
0.199733 0.006875 0.328379
0.081081 0.001710
1214
37
1174
37
1223
41
96
1193
61
0.87
0 .3 5
my26b79
3.112652
0.155320
0.225428
0.001919
1436
38
1310
40
1430
41
92
1372
66
7.51
0 .0 1
my26b80
2.471067
0.106604
0.201982 0.005345
0.306711 0.083553 0.001783
1264
31
1186
29
1282
42
92
1218
49
4.73
0 .0 3
my26b81
2.610598
0.081009
0.215926 0.005843
0.436011 0.084021 0.000924
1304
23
1260
31
1293
21
97
1293
44
2.18
0 .14
my26b82
1.889646
0.058080
0.178166
0.319401 0.075478 0.000868
1077
20
1057
19
1081
23
98
1066
32
0.78
0 .3 8
my26b85
2.964321
0.143051 0.245446 0.007478 0.315686
0.090944 0.001812
1399
37
1415
39
1445
38
98
1406
61
0.14
0.71
my26b86
2.211712
0.112393
0.177642 0.006489 0.359384 0.079906 0.001517
1185
36
1054
36
1195
37
88
1113
60
10.24
0 .0 0
my26b87
1.912173
0.062599
0.165329 0.004872 0.450074 0.076213 0.000964
1085
22
986
27
1101
25
90
1051
41
14.51
0 .0 0
my26b89
1.824841
0.068924
0.174891
0.004015 0.303924 0.077453 0.000829
1054
25
1039
22
1133
21
92
1045
38
0.31
0.58
my26b90
1.602170
0.062523
0.153210
0.004303 0.359849 0.075584 0.000680
971
24
919
24
1084
18
85
943
40
3.57
0 .0 6
my26b91
3.947578
0.158329
0.247658 0.007758 0.390531 0.102388
1623
32
1426
40
1668
20
86
1546
62
23.30 0 .0 0
my26b11
1.581219
0.144911
0.121652
0.007874 0.353155
0.086618 0.003854
963
57
740
45
1352
86
55
791
85
12.78
0 .0 0
no t used
my26b12
1.978714
0.150816
0.161801
0.007018 0.284519
0.078625 0.002153
1108
51
967
39
1163
54
83
1004
72
6.19
0 .0 1
no t used
my26b16
1.867136
0.106015
0.150730 0.006999 0.408897 0.078517
0.001869
1070
38
905
39
1160
47
78
982
67
15.00
0 .0 0
no t used
my26b17
4.052715
0.167138
0.237864 0.008669 0.441838
0.105550 0.000753
1645
34
1376
45
1724
13
80
1556
67
39.65 0 .0 0
no t used
my26b21
2.917786
0.112575
0.201460 0.006578 0.423167
0.089994 0.000951
1387
29
1183
35
1425
20
83
1303
56
33.22 0 .0 0
no t used
my26b28
2.784290
0.214892
0.209720 0.007738 0.239037 0.091347 0.003333
1351
58
1227
41
1454
69
84
1258
76
3.71
0 .0 5
no t used
my26b29
2.014577
0.165608
0.200111
0.010712
1120
56
1176
58
987
82
119
1146
91
0.72
0 .4 0
no t used
my26b39
1.430502
0.087050
0.131048
0.006981 0.437696
0.001393
902
36
794
40
963
40
82
852
66
7.00
0 .0 1
no t used
my26b46
3.786872
0.187859
0.299337 0.008742 0.294338 0.092303 0.001844
1590
40
1688
43
1474
38
115
1630
65
3.97
0 .0 5
no t used
my26b48
3.656147
0.240446 0.322854
1562
52
1804
62
1464
55
12 3
1639
88
12.66
0 .0 0
no t used
0.391187
0.006217 0.353163
0.321013
0.083455 0.001084
0.104625
0.007651 0.340082 0.090188
0.003498
0.001108
0.325600 0.072051 0.002896
0.012825 0.302017
0.071195
0.091828
0.002661
206
P b/ 238U
969
206
P b/ 238U
116 0
61
co nco rdia
10 9 8
54
206
P b/ 238U
110 0
47
206
P b/ 238U
116 4
58
206
P b/ 238U
14 5 9
83
206
P b/ 238U
117 4
74
206
P b/ 238U
13 10
80
206
P b/ 238U
118 6
57
206
P b/ 238U
12 6 0
62
206
P b/ 238U
10 5 7
38
co nco rdia
14 0 6
61
206
P b/ 238U
10 5 4
71
206
P b/ 238U
986
54
co nco rdia
10 4 5
38
206
P b/ 238U
9 19
48
206
P b/ 238U
14 2 6
80
Sample P-310-4 continued:
my26b50
1.715732
0.053508
0.176904 0.003554
0.068239 0.000775
1014
20
1050
19
876
23
12 0
1033
32
2.42
0 .12
no t used
my26b51
2.430854
0.088977
0.226318 0.004698 0.283577 0.078577 0.001125
1252
26
1315
25
1162
28
113
1285
40
4.37
0 .0 4
no t used
my26b52
3.640292
0.140549
0.300607 0.008987 0.387177
0.084148
0.001188
1558
31
1694
45
1296
27
13 1
1585
57
9.81
0 .0 0
no t used
my26b56
2.164250
0.251429
0.150724
0.010983 0.313605
0.090246 0.003972
1170
81
905
62
1431
84
63
959
116
8.47
0 .0 0
no t used
my26b59
1.920989
0.087353
0.171487
0.005100 0.327015
0.081437
0.001201
1088
30
1020
28
1232
29
83
1049
48
3.95
0 .0 5
no t used
my26b77
1.666244
0.103469
0.160334
0.005142 0.258243 0.077697 0.001400
996
39
959
29
1139
36
84
969
52
0.76
0 .3 8
no t used
my26b88
3.117391
0.127821
0.215667 0.006627 0.374709 0.094496 0.001967
1437
32
1259
35
1518
39
83
1352
57
22.07 0 .0 0
no t used
my26b92
1.848865
0.406944
0.129796
1063
145
787
108
1057
131
74
836
207
2.92
no t used
0.322110
0.018983 0.332237 0.074555 0.004837
0 .0 9
Sample KSH-11-01:
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
±1σ
Rho
Pb
206
Pb
207
±1σ
Pb ±1σ
235
U (Ma)
206
Pb ±1σ
238
U (Ma)
207
206
Pb ±1σ U/Pb Concordia M SWD P ro b. 232 Th 238 U
Pb (Ma) Pb/Pb age ±2σ (Ma)(of concordance)
(ppm) (ppm) Th/U
(a)
(b)
(c)
Age used Age ±2σ (Ma)
(d)
(e)
Sample KSH-11-01 (38.38958°N, 77.76225°W)
0.071097 0.002458
1034
49
1052
43
960
71
110
1044
74
0.11
0.74
11
37
0.292
co nco rdia
10 4 4
74
0.111853
0.003303
1696
54
1689
65
1830
54
92
1693
95
0.01
0.92
26
20
1.259
co nco rdia
16 9 3
95
0.210100
0.006271 0.347793 0.081935 0.000854
1235
31
1229
33
1244
20
99
1233
52
0.03
0.87
52
286
0.181
co nco rdia
12 3 3
52
0.158365
0.184253
0.012525 0.366352 0.074621 0.003087
1011
59
1090
68
1058
83
103
1040
103
1.21
0 .2 7
7
26
0.253
206
10 9 0
13 6
1.523757
0.049048
0.157856 0.004324 0.425518
0.068034 0.000733
940
20
945
24
870
22
109
942
36
0.04
0.84
57
702
0 .0 8 2
942
36
2.230120
0.078072 0.209802 0.004744 0.322932 0.076557 0.000951
1191
25
1228
25
1110
25
111
1208
40
1.66
0 .2 0
17
263
0 .0 6 3
jl23a14
2.563694
0.250084 0.222226
0.372928 0.092709 0.004084
1290
71
1294
85
1482
83
87
1292
127
0.00
0.97
10
18
jl23a15
1.757688
0.059428
0.172060 0.004654 0.399979 0.073598 0.000857
1030
22
1023
26
1030
24
99
1028
39
0.06
0.80
155
jl23a18
3.092851 0.062667 0.246378 0.004892 0.489940 0.088789 0.000546
1431
16
1420
25
1400
12
101
1430
31
0.25
0.62
255
jl23a19
1.729890
0.066688
0.169930
1020
25
1012
21
1058
23
96
1015
37
0.08
0.77
73
490
jl23a20
2.460171
0.586485
0.197227 0.022436 0.238589 0.092198
0.001479
1260
172
1160
121
1471
30
79
1185
222
0.28
0.60
69
jl23a21
11.350622 0.533253 0.480089
0.172571 0.001481
2552
44
2528
64
2583
14
98
2546
82
0.14
0.70
21
0.010798
993
29
1013
25
1176
270
86
1005
43
0.37
0.55
jl23a07
1.767789
0.134854
jl23a08
4.313215
0.282921 0.299509
0.013035 0.331757
jl23a09
2.375986
0.101958
jl23a10
1.707008
jl23a11
jl23a13
0.177264 0.007887 0.291625
0.016169
0.003861 0.294725 0.074618 0.000852
0.014793 0.327932
P b/ 238U
co nco rdia
206
P b/ 238U
12 2 8
51
0.579
co nco rdia
12 9 2
12 7
255
0.608
co nco rdia
10 2 8
39
799
0.318
co nco rdia
14 3 0
31
0.148
co nco rdia
10 15
37
326
0.213
co nco rdia
118 5
222
239
0 .0 8 8
co nco rdia
2546
82
56
163
0.345
co nco rdia
10 0 5
43
jl23a22
1.659181
0.076987
0.170120
0.004585 0.290431 0.079167
jl23a23
2.571041
0.102960
0.221414
0.007478 0.421700
0.085726 0.001648
1292
29
1289
39
1332
37
97
1292
55
0.01
0.93
60
112
0.535
co nco rdia
12 9 2
55
jl23a24
1.933184
0.109011
0.186934 0.008009 0.379904 0.078792 0.002278
1093
38
1105
43
1167
57
95
1097
67
0.07
0.79
23
38
0.606
co nco rdia
10 9 7
67
jl23a25
1.645307
0.186937
0.162722
0.009401 0.254235 0.082694 0.002613
988
72
972
52
1262
62
77
976
94
0.04
0.84
24
114
0.210
co nco rdia
976
94
jl23a29
1.562409
0.059821
0.161031 0.004029 0.326753 0.070537 0.001164
955
24
963
22
944
34
102
959
37
0.07
0.79
73
223
0.329
co nco rdia
959
37
jl23a30
3.442061
0.211595
0.269402
0.010822 0.326743
0.002076
1514
48
1538
55
1645
38
93
1524
83
0.16
0.69
53
84
0.631
co nco rdia
15 2 4
83
jl23a31
1.786089
0.093467
0.175160
0.005955 0.324827 0.080280 0.001527
1040
34
1040
33
1204
37
86
1040
54
0.00
1.00
395
170
2.318
co nco rdia
10 4 0
54
jl23a32
2.421897
0.117791
0.206333
0.007315 0.364479 0.086804 0.001567
1249
35
1209
39
1356
35
89
1232
61
0.90
0 .3 4
88
170
0.519
206
P b/ 238U
12 0 9
78
jl23a33
2.399201
0.146111
0.219290 0.007583 0.283913
0.084878 0.001447
1242
44
1278
40
1313
33
97
1262
66
0.51
0 .4 7
41
114
0.358
206
P b/ 238U
12 7 8
80
jl23a34
2.030360
0.109867
0.186824 0.005093 0.251894
0.082840 0.001822
1126
37
1104
28
1265
43
87
1111
49
0.29
0.59
99
126
0.783
co nco rdia
1111
49
jl23a35
2.337471 0.093307
0.206401 0.005879 0.356789 0.086083 0.001212
1224
28
1210
31
1340
27
90
1218
49
0.17
0.68
78
209
0.370
co nco rdia
12 18
49
jl23a36
1.599304
0.163792
0.159050
0.010678 0.327774 0.076735 0.002098
970
64
951
59
1114
55
85
960
101
0.07
0.80
124
97
1.278
co nco rdia
960
10 1
jl23a39
3.555135
0.377157
0.296626 0.022358 0.355247 0.098730 0.003663
1540
84
1675
111
1600
69
105
1575
151
1.42
0 .2 3
10
24
0.419
P b/ 238U
16 7 5
222
jl23a40
1.620882
0.088183
0.165280 0.005325 0.296078 0.075518
978
34
986
29
1082
47
91
983
51
0.04
0.84
17
76
0.221
co nco rdia
983
51
jl23a41
1.911439
0.139508
0.189691 0.007054 0.254735 0.079390 0.001235
1085
49
1120
38
1182
31
95
1107
67
0.42
0.52
61
175
0.349
co nco rdia
110 7
67
jl23a42
2.073192
0.086450
0.185619
0.005273 0.340617
0.082577 0.001405
1140
29
1098
29
1259
33
87
1118
47
1.65
0 .2 0
139
186
0.748
P b/ 238U
10 9 8
57
jl23a43
1.773966
0.131099
0.174105
0.007929 0.308109
0.077769 0.001980
1036
48
1035
44
1141
51
91
1035
74
0.00
0.98
38
72
0.528
co nco rdia
10 3 5
74
jl23a44
2.087243
0.116273
0.192746 0.005842 0.272064
0.081931 0.001781
1145
38
1136
32
1244
43
91
1139
55
0.04
0.84
31
140
0.218
co nco rdia
113 9
55
0.101150
0.001761
206
206
Sample KSH-11-01 continued:
206
P b/ 238U
12 5 9
115
206
P b/ 238U
13 3 8
49
0.296
co nco rdia
114 2
71
68
1.130
co nco rdia
970
62
201
747
0.269
co nco rdia
1116
26
361
391
0.923
co nco rdia
13 12
36
0.97
32
34
0.939
co nco rdia
10 6 6
119
0.30
0.58
45
101
0.440
co nco rdia
113 5
47
0.29
0.59
17
35
0.474
co nco rdia
117 7
12 9
74
1.37
0 .2 4
359
682
0.526
P b/ 238U
119 1
95
1181
34
0.14
0.71
123
258
0.477
co nco rdia
118 1
34
94
1226
40
0.09
0.77
276
463
0.597
co nco rdia
12 2 6
40
29
94
1275
51
0.07
0.80
76
140
0.541
co nco rdia
12 7 5
51
1256
59
87
1091
80
0.00
0.94
33
51
0.634
co nco rdia
10 9 1
80
35
1138
37
91
1058
56
1.28
0 .2 6
78
157
0.497
P b/ 238U
10 3 4
70
1267
72
1350
34
94
1285
87
0.10
0.75
66
126
0.524
co nco rdia
12 8 5
87
34
1177
39
1225
37
96
1185
60
0.09
0.76
34
99
0.343
co nco rdia
118 5
60
1499
23
1560
40
1450
20
108
1502
46
3.05
0 .0 8
65
434
0.149
P b/ 238U
15 6 0
80
0.092537 0.002597
1208
51
1197
44
1478
53
81
1201
75
0.03
0.86
10
45
0.227
co nco rdia
12 0 1
75
0.083929 0.002684
1044
171
1099
108
1291
62
85
1085
197
0.09
0.76
24
54
0.438
co nco rdia
10 8 5
19 7
31
1072
31
1168
27
92
1069
50
0.02
0.88
122
293
0.414
co nco rdia
10 6 9
50
30
2709
52
2768
26
98
2724
59
0.14
0.71
27
39
0.693
co nco rdia
2724
59
23
1357
25
1440
22
94
1364
39
0.21
0.65
155
241
0.645
co nco rdia
13 6 4
39
1196
20
1210
26
1239
17
98
1200
37
0.30
0.58
126
458
0.275
co nco rdia
12 0 0
37
1215
53
1258
62
1265
16
99
1231
93
0.43
0.51
276
628
0.440
co nco rdia
12 3 1
93
0.078711 0.002084
999
38
997
34
1165
52
86
998
57
0.00
0.96
34
53
0.635
co nco rdia
998
57
0.077210
0.001526
1114
33
1107
31
1127
39
98
1110
52
0.03
0.86
42
106
0.394
co nco rdia
1110
52
0.004172 0.384130
0.084357 0.000814
1296
18
1283
22
1301
19
99
1292
33
0.36
0.55
119
340
0.348
co nco rdia
12 9 2
33
0.142708
0.179761 0.007582 0.281073
0.079592 0.002218
1082
50
1066
41
1187
55
90
1072
72
0.08
0.77
38
49
0.762
co nco rdia
10 7 2
72
1.754729
0.101853
0.169686 0.006393 0.324546 0.073694 0.001424
1029
38
1010
35
1033
39
98
1019
59
0.19
0.66
27
124
0.216
co nco rdia
10 19
59
jl23a89
2.892947
0.303243
0.228181
1380
79
1325
81
1512
42
88
1352
131
0.35
0.56
67
76
0.888
co nco rdia
13 5 2
13 1
jl23a90
2.294617
0.095929 0.206437 0.006653 0.385420 0.078809 0.001287
1211
30
1210
36
1167
32
104
1210
53
0.00
0.98
57
114
0.498
co nco rdia
12 10
53
jl23a91
1.976446
0.055177
0.187827 0.003933 0.375004 0.075577 0.000571
1108
19
1110
21
1084
15
102
1108
33
0.01
0.93
142
1189
0.120
co nco rdia
110 8
33
jl23a92
3.209791 0.097954
0.251128
1460
24
1444
28
1442
21
100
1454
42
0.27
0.61
153
313
0.487
co nco rdia
14 5 4
42
jl23a93
1.700798
0.166873 0.004097 0.416885
1009
19
995
23
992
24
100
1004
34
0.38
0.54
19
524
0 .0 3 7
co nco rdia
10 0 4
34
jl23a45
2.604179
0.156013
jl23a46
2.812233
0.083783 0.230677 0.004690
0.092836 0.000933
1302
44
1259
58
1485
19
85
1289
83
0.59
0 .4 4
189
468
0.404
0.341231 0.092626 0.000943
1359
22
1338
25
1480
19
90
1350
38
0.59
0 .4 4
107
441
0.242
jl23a47
2.134421
0.137930
0.191133
0.007843 0.317506
0.084989 0.001716
1160
45
1128
42
1315
39
86
1142
71
0.40
0.53
44
150
jl23a50
1.609062
0.093793
0.161683
0.006955 0.368963 0.075773 0.001960
974
37
966
39
1089
52
89
970
62
0.03
0.86
77
jl23a51
2.000324
0.053065
jl23a52
2.657782
0.188934 0.002760 0.275355 0.079814 0.000836
1116
18
1116
15
1192
21
94
1116
26
0.00
1.00
0.072320 0.223979 0.004492 0.368525 0.087688 0.000883
1317
20
1303
24
1376
19
95
1312
36
0.32
0.57
jl23a53
1.864783
0.241986
0.179627
0.012319
1069
86
1065
67
1385
63
77
1066
119
0.00
jl23a54
2.027448
0.091932
0.194172
0.005243 0.297720 0.081329
0.001720
jl23a55
2.269699
0.254694
0.196012
0.014446 0.328386 0.089926 0.003001
1125
31
1144
28
1229
42
93
1135
47
1203
79
1154
78
1424
64
81
1177
129
jl23a56
2.039940
0.134673
0.202945
0.008818 0.329078 0.076392 0.000793
1129
45
1191
47
1105
21
108
1157
jl23a59
2.188249
0.062636 0.202040
0.004114
0.355664 0.081838 0.000978
1177
20
1186
22
1242
23
96
jl23a60
2.333713
0.073414
0.210351 0.004985 0.376645 0.084428 0.000819
1223
22
1231
27
1302
19
jl23a62
2.499926
0.097194
0.219865 0.006584 0.385136
0.086801 0.001303
1272
28
1281
35
1356
jl23a63
1.919918
0.159254
0.184650 0.008582 0.280158
0.082429 0.002481
1088
55
1092
47
jl23a64
1.889727
0.093177
0.174037 0.006379 0.371678
0.077647 0.001442
1077
33
1034
jl23a65
2.551360
0.152987
0.217253
0.013608 0.522291 0.086507 0.001544
1287
44
jl23a66
2.226412
0.107939
0.200291 0.007351 0.378519
0.081127
0.001515
1189
jl23a69
3.374781 0.099908
0.273818
0.007918 0.488379
0.091184 0.000958
jl23a70
2.284620
0.163433
0.204133
0.008190 0.280417
jl23a71
1.796039
0.470486
0.185814
0.019910
jl23a72
1.859012
0.086108
0.180918
0.005599 0.334068 0.078829 0.001063
1067
jl23a73
13.666884 0.437938 0.522247
0.012199
0.003017
2727
jl23a75
2.853476
0.085605 0.234325 0.004783 0.340182
0.090695 0.001046
1370
jl23a80
2.247390
0.064056 0.206446 0.004835 0.410804
0.081711
0.000719
jl23a81
2.309075
0.172057
0.215451
0.011719
0.364980 0.082828 0.000688
jl23a82
1.675536
0.099179
0.167311
0.006071 0.306526
jl23a83
1.995680
0.097573
0.187424 0.005762
jl23a84
2.584800
0.063743
0.220184
jl23a85
1.901938
jl23a86
0.050079
0.215644
0.010849 0.419897
0.264259 0.088102 0.002877
0.204516
0.364490 0.193026
0.314416
0.015377 0.321446
0.094186 0.002084
0.005419 0.353535 0.090804 0.000983
0.072220 0.000849
206
206
206
Sample KSH-11-01 continued:
1477
67
1475
73
1677
63
88
1476
113
0.00
0.99
8
28
0.278
co nco rdia
14 7 6
113
0.322940
0.091971 0.001226
1449
68
1442
73
1467
25
98
1446
114
0.01
0.93
210
317
0.664
co nco rdia
14 4 6
114
0.100058
0.173257 0.005005 0.259341
0.077151 0.001794
1044
36
1030
27
1125
46
92
1034
49
0.13
0.72
34
92
0.376
co nco rdia
10 3 4
49
0.252083
0.206717
0.013357 0.318063
0.096387 0.003526
1267
74
1211
71
1555
69
78
1237
119
0.42
0.52
7
14
0.518
co nco rdia
12 3 7
119
3.558299
0.117413
0.267021 0.005141 0.291722
0.095733 0.001337
1540
26
1526
26
1543
26
99
1533
42
0.22
0.64
139
197
0.705
co nco rdia
15 3 3
42
3.557538
0.223308 0.266406 0.008452 0.252720
0.101442 0.002642
1540
50
1523
43
1651
48
92
1530
73
0.09
0.76
28
69
0.401
co nco rdia
15 3 0
73
jl23a103
1.706303
0.075708
0.166173
0.006004 0.407159
0.072752 0.000789
1011
28
991
33
1007
22
98
1003
51
0.35
0.56
83
529
0.157
co nco rdia
10 0 3
51
jl23a104
2.183227
0.094743
0.199917
0.005217 0.300663 0.078128
1176
30
1175
28
1150
36
102
1175
47
0.00
0.98
41
88
0.460
co nco rdia
117 5
47
jl23a105
1.959832
0.106476
0.187804 0.006285 0.307972 0.077471
0.001113
1102
37
1109
34
1133
29
98
1106
57
0.03
0.85
56
214
0.264
co nco rdia
110 6
57
jl23a106
3.226333
0.140708
0.248996 0.009229 0.424916
0.001076
1464
34
1433
48
1480
22
97
1457
65
0.45
0.50
269
270
0.997
co nco rdia
14 5 7
65
jl24a07
2.174594
0.124836
0.195477 0.006694 0.298254 0.085327 0.001776
1173
40
1151
36
1323
40
87
1160
61
0.24
0.63
15
93
0.163
co nco rdia
116 0
61
jl24a08
2.115437
0.102134
0.200165 0.006852 0.354520 0.077969 0.001279
1154
33
1176
37
1146
33
103
1163
57
0.31
0.57
49
170
0.287
co nco rdia
116 3
57
jl24a09
2.036539
0.092867
0.188541 0.005089 0.295945 0.080798 0.001436
1128
31
1113
28
1217
35
92
1119
47
0.17
0.68
118
227
0.518
co nco rdia
1119
47
jl24a10
2.302181
0.164744
0.199778
0.013060 0.456752 0.076675 0.001515
1213
51
1174
70
1113
39
106
1204
98
0.36
0.55
167
162
1.035
co nco rdia
12 0 4
98
jl24a11
2.549525
0.112795
0.216050 0.007375 0.385769 0.087233 0.001532
1286
32
1261
39
1366
34
92
1277
59
0.40
0.53
39
71
0.542
co nco rdia
12 7 7
59
jl24a12
0.732430
0.026285
0.088815
0.001749 0.274429 0.061824
0.000881
558
15
549
10
668
31
82
551
19
0.35
0.56
630
632
0.996
co nco rdia
551
19
jl24a13
2.132940
0.089332
0.196142
0.005010 0.304957 0.083125
0.001286
1160
29
1155
27
1272
30
91
1157
45
0.02
0.88
61
142
0.429
co nco rdia
115 7
45
jl24a14
3.086747
0.173678
0.247133 0.009356 0.336420 0.094792 0.001666
1429
43
1424
48
1524
33
93
1427
74
0.01
0.91
48
68
0.701
co nco rdia
14 2 7
74
jl24a17
1.922054
0.110474
0.184857 0.007830 0.368476 0.079247 0.001844
1089
38
1093
43
1178
46
93
1091
67
0.01
0.92
59
66
0.897
co nco rdia
10 9 1
67
jl24a18
2.939703
0.122147
0.240730 0.006563 0.328072 0.091953
0.002019
1392
31
1390
34
1466
42
95
1391
53
0.00
0.96
43
62
0.693
co nco rdia
13 9 1
53
jl24a19
2.218944
0.095054
0.201355 0.006984 0.404815
0.077739 0.000968
1187
30
1183
37
1140
25
104
1186
55
0.01
0.91
134
266
0.504
co nco rdia
118 6
55
jl24a20
2.127156
0.111840
0.202001 0.009377 0.441438
0.076748 0.001564
1158
36
1186
50
1115
41
106
1164
69
0.36
0.55
25
57
0.434
co nco rdia
116 4
69
jl24a21
2.197160
0.099777
0.199260 0.006246 0.345144
0.082792 0.001456
1180
32
1171
34
1264
34
93
1176
54
0.06
0.81
40
92
0.434
co nco rdia
117 6
54
jl24a23
2.037786
0.063467
0.189120
0.004463 0.378875 0.078035 0.000668
1128
21
1117
24
1148
17
97
1124
37
0.21
0.65
442
862
0.512
co nco rdia
112 4
37
jl24a24
2.138619
0.055875
0.196903 0.003950 0.383899 0.078054 0.000948
1161
18
1159
21
1148
24
101
1160
32
0.02
0.90
244
326
0.748
co nco rdia
116 0
32
jl24a27
1.621585
0.183854
0.172192
979
71
1024
68
960
56
107
1002
112
0.32
0.57
75
104
0.725
co nco rdia
10 0 2
112
jl24a28
2.104396
0.152765
0.189029 0.008609 0.313687
0.092460 0.002517
1150
50
1116
47
1477
52
76
1131
79
0.36
0.55
13
49
0.258
co nco rdia
113 1
79
jl24a29
2.736172
0.161507
0.230981
0.010151 0.372263 0.082256 0.002222
1338
44
1340
53
1252
53
107
1339
79
0.00
0.98
13
31
0.405
co nco rdia
13 3 9
79
jl24a30
1.810209
0.123789
0.172804 0.009628 0.407370 0.079862 0.002449
1049
45
1028
53
1194
61
86
1041
81
0.16
0.69
46
38
1.213
co nco rdia
10 4 1
81
jl24a31
1.486472
0.150763
0.154458
925
62
926
73
1183
76
78
925
111
0.00
0.99
9
16
0.567
co nco rdia
925
111
jl24a32
1.664671
0.055837
0.164831 0.004252 0.384545 0.075952 0.000826
995
21
984
24
1094
22
90
990
37
0.22
0.64
133
467
0.284
co nco rdia
990
37
jl24a33
2.698716
0.124226
0.223743 0.007567 0.367344 0.089577 0.001225
1328
34
1302
40
1417
26
92
1318
61
0.40
0.53
62
150
0.416
co nco rdia
13 18
61
jl24a34
2.927003
0.170378
0.235740
0.090874 0.001186
1389
44
1365
54
1444
25
94
1380
80
0.19
0.66
72
219
0.330
co nco rdia
13 8 0
80
jl24a37
1.931512
0.094720
0.190435 0.006097 0.326432 0.077227 0.001167
1092
33
1124
33
1127
30
100
1107
53
0.69
0 .4 1
40
175
0.228
jl23a94
3.280792
0.281516
jl23a96
3.165515
0.277554 0.250630
jl23a99
1.796595
jl23a100
2.481718
jl23a101
jl23a102
jl24a38
1.805292
0.086692
0.257185
0.181457
0.014235 0.322529 0.102880 0.003502
0.014193
0.012449
0.092610
0.318831 0.071082
0.013020 0.415553
0.010378 0.378158
0.001414
0.001952
0.079425 0.003035
0.005049 0.289706 0.077476 0.001483
1047
31
1075
28
1133
38
95
1063
47
0.62
0 .4 3
81
114
0.708
206
P b/ 238U
112 4
66
206
P b/ 238U
10 7 5
55
Sample KSH-11-01 continued:
jl24a39
1.450497
0.055113
0.001241
910
23
947
23
976
35
97
928
37
1.96
0 .16
74
123
0.605
P b/ 238U
947
46
jl24a40
2.630610
0.090273 0.227076 0.005229 0.335547 0.088037 0.001360
1309
25
1319
27
1383
30
95
1314
43
0.11
0.74
49
135
0.362
co nco rdia
13 14
43
jl24a41
1.697515
0.135093
0.166481
0.002218
1008
51
993
40
1253
53
79
998
70
0.07
0.79
21
65
0.319
co nco rdia
998
70
jl24a42
1.803062
0.116391
0.174689 0.006583 0.291883
0.079424 0.001714
1047
42
1038
36
1183
43
88
1041
62
0.03
0.85
86
140
0.612
co nco rdia
10 4 1
62
jl24a43
1.573558
0.122659
0.151390
0.009762
0.073496 0.001784
960
48
909
55
1028
49
88
939
87
0.83
0 .3 6
28
84
0.333
P b/ 238U
909
10 9
jl24a44
2.384222
0.116657
0.206460
0.007591 0.375723 0.085579 0.001300
1238
35
1210
41
1329
29
91
1227
62
0.43
0.51
62
163
0.383
co nco rdia
12 2 7
62
jl24a47
1.847345
0.217846
0.178325
0.016311 0.387818
0.078433 0.001697
1062
78
1058
89
1158
43
91
1061
138
0.00
0.96
47
111
0.425
co nco rdia
10 6 1
13 8
jl24a48
0.723348
0.043118
0.089783
0.003116
0.061431 0.001663
553
25
554
18
654
58
85
554
34
0.00
0.95
294
239
1.229
co nco rdia
554
34
jl24a49
1.719894
0.139328
0.177269 0.009706 0.337943 0.073705 0.001971
1016
52
1052
53
1033
54
102
1033
85
0.36
0.55
14
55
0.248
co nco rdia
10 3 3
85
jl24a50
1.839054
0.092801
0.178491 0.006675 0.370560 0.075499 0.001370
1060
33
1059
37
1082
36
98
1059
57
0.00
0.98
52
109
0.477
co nco rdia
10 5 9
57
jl24a51
2.360811
0.109708
0.209313 0.006450 0.331542
0.085759 0.001274
1231
33
1225
34
1333
29
92
1228
55
0.02
0.88
93
207
0.448
co nco rdia
12 2 8
55
jl23a12
-0.456151 -0.037665 0.147560
0.013083 0.536895 -0.023564 -0.001067
-618
70
887
73
-1
56
###
-85
53
7
10
0.698
no t used
jl23a61
2.239902
0.247109
0.190015
0.012422 0.296284 0.099483 0.003369
1194
77
1121
67
1614
63
69
1148
117
0.68
0 .4 1
43
35
1.202
no t used
jl23a74
2.142845
0.157331
0.223513 0.009962 0.303532 0.078715 0.002007
1163
51
1300
52
1165
51
112
1223
81
5.21
0 .0 2
15
36
0.407
no t used
jl23a95
2.491747
0.224295 0.205559
0.011347
0.306625
0.102531 0.003988
1270
65
1205
61
1670
72
72
1232
103
0.74
0 .3 9
6
19
0.303
no t used
jl24a22
4.250045
0.407226
0.012156
0.576519
0.310428
1684
79
673
71
3523
72
19
436
137
173
3
55.386
no t used
0.158196
0.110030
0.004154 0.345560 0.071648
0.007195 0.271529
0.413611
0.291075
0.082312
0.014492
166.89 0 .0 0
88.93 0 .0 0
206
206
Sample KSH-11-05:
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
±1σ
Rho
Pb
206
Pb
207
±1σ
Pb ±1σ
235
U (Ma)
206
Pb ±1σ
238
U (Ma)
207
206
Pb ±1σ U/Pb Concordia M SWD P ro b. 232 Th 238 U
Pb (Ma) Pb/Pb age ±2σ (Ma)(of concordance)
(ppm) (ppm) Th/U
(a)
(b)
(c)
Age used Age ±2σ (Ma)
(d)
(e)
Sample KSH-11-05 (38.30957°N, 77.73648°W)
jl24b03
2.224620
0.088592
0.198805 0.004775 0.301565
0.079233 0.001046
1189
28
1169
26
1178
26
99
1178
43
0.39
0.53
jl24b05
2.095565
0.145520
0.194246 0.006084 0.225519
0.081441 0.001651
1147
48
1144
33
1232
40
93
1145
59
0.00
0.95
jl24b06
2.301257
0.085083
0.206619 0.004584 0.300009 0.080713
0.001218
1213
26
1211
24
1214
30
100
1212
41
0.00
0.95
jl24b07
2.771678
0.242867
0.225641 0.013797 0.348915
0.089554 0.002115
1348
65
1312
73
1416
45
93
1332
114
0.21
jl24b08
1.732274
0.051225
0.166038 0.003526 0.359029 0.075300 0.000680
1021
19
990
19
1077
18
92
1006
32
1.92
jl24b09
3.432985
0.097582
0.250016 0.005040 0.354568 0.096471 0.000762
1512
22
1439
26
jl24b10
2.208738
0.169967
0.205451 0.007799 0.246658 0.079760 0.001092
1184
54
1205
jl24b13
2.162691
0.130344
0.196545 0.007743 0.326808 0.076273 0.001292
1169
42
1157
jl24b14
2.353089
0.109332
0.207779 0.005843 0.302612
0.001351
1228
33
jl24b15
2.332697
0.080480 0.205044 0.005309 0.375235 0.082670 0.001029
1222
25
jl24b16
1.644839
0.052421
988
20
950
0.158725 0.003455 0.341488
0.080148
0.074477 0.000744
2.069012
0.098036
40
42
1191
42
1102
1217
31
1202
28
19
7.01
0 .0 1
27
101
1197
34
105
1163
73
0.12
0.73
68
0.07
0.80
1201
33
101
1261
24
95
1222
52
0.09
0.76
1215
44
0.45
1054
20
90
967
32
2.79
0.50
0 .10
24
1220
24
1231
25
99
1230
40
0.47
0 .4 9
1163
22
1121
33
1145
12
98
1158
43
2.07
0 .15
0.067759
jl24b19
1482
1240
0.080861 0.208409 0.004583 0.325027 0.081397
2.144033
0.511216
92
0.001040
2.390465
jl24b18
0.006140
15
0.077922 0.000463
jl24b17
0.190016
1557
0.65
0 .17
0.186998 0.005950 0.335730 0.077753 0.001549
1139
32
1105
32
1141
40
97
1121
53
0.80
0 .3 7
1194
28
1158
25
1221
31
95
1172
42
1.30
0 .2 5
0.546475 0.200572 0.028396 0.292228 0.085765 0.002201
1199
170
1178
152
1333
50
88
1187
259
0.01
0.92
0.087865 0.202642
0.081417 0.000829
1202
27
1189
29
1232
20
97
1196
46
0.15
0.70
0.094673 0.207495 0.007499 0.466993 0.082002 0.000617
1256
28
1215
40
1246
15
98
1248
54
1.26
0 .2 6
jl24b20
2.239962
0.088658
jl24b23
2.255966
jl24b24
2.267099
jl24b25
2.446528
0.196747 0.004595 0.295006 0.080981 0.001276
0.005471 0.348285
1248
23
1216
21
1302
21
93
1229
36
1.41
0 .2 3
0.402695 0.070851 0.002315
887
0.006381 0.245848 0.079884 0.001784
1042
35
886
40
953
67
47
1063
35
1194
44
93
886
63
0.00
0.98
89
1056
62
0.16
0.69
990
19
1013
1088
28
1127
17
98
1000
30
0.86
0 .3 5
17
96
1118
43
2.70
0 .10
1222
18
1187
76
1294
22
94
1221
29
0.01
0.94
1214
45
98
1191
120
0.01
0.92
29
964
20
1219
29
1018
32
95
965
47
0.01
0.92
24
1220
16
100
1214
36
0.10
896
16
0.75
890
19
946
11
94
894
29
0.09
0.009549 0.253757 0.077391 0.001530
1040
0.76
70
1038
52
1131
39
92
1038
93
0.00
0.005513 0.470396 0.075640 0.000899
1119
0.98
21
1116
30
1086
24
103
1119
41
0.02
0.89
jl24b26
2.418702
0.079084 0.207677 0.003929 0.289321 0.084391 0.000912
jl24b27
1.394730
0.083686
0.147276
0.007117
jl24b28
1.790903
0.129712
0.179189
jl24b29
1.700739
0.047229
0.165948
0.003415 0.370545 0.072973 0.000629
1009
18
jl24b30
2.056153
0.069898
0.183842
0.005221 0.417688
0.077243 0.000676
1134
23
jl24b33
2.325889
0.057848 0.208694 0.003448
0.332171 0.084066 0.000972
1220
18
jl24b35
2.243599
0.222913
0.202094
0.014194
0.353459 0.080701 0.001856
1195
70
jl24b36
1.591896
0.073558
0.161279
0.005188 0.348068 0.073157
0.001149
967
jl24b37
2.296319
0.065233
0.208187
0.004510 0.381327
0.080947 0.000649
1211
jl24b38
1.415630
0.037940
0.148012
0.003456 0.435666 0.070610 0.000382
jl24b39
1.784577
0.192291
0.174618
jl24b44
2.011364
0.062376
0.188949
132 224 0.590
57 145 0.390
38 150 0.253
17
58 0.287
190 541 0.350
28 661 0.043
93 230 0.406
51 124 0.411
84 113 0.739
63 210 0.298
126 639 0.197
85 310 0.275
163 1680 0.097
73
53 1.360
143 228 0.630
63
50 1.269
165 445 0.371
311 891 0.349
182 357 0.511
38
35 1.081
55
58 0.952
300 541 0.554
102 607 0.168
104 209 0.498
81 125 0.645
111 156 0.714
90 1104 0.082
762 1959 0.389
311 171 1.814
140 307 0.456
concordia
concordia
concordia
concordia
206
P b/ 238U
206
P b/ 238U
concordia
concordia
concordia
concordia
206
P b/ 238U
206
P b/ 238U
206
P b/ 238U
206
P b/ 238U
206
P b/ 238U
concordia
concordia
206
P b/ 238U
206
P b/ 238U
concordia
concordia
206
P b/ 238U
206
P b/ 238U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
1178
1145
1212
1332
990
1439
1197
1163
1222
1215
950
1220
1121
1105
1158
1187
1196
1215
1216
886
1056
990
1088
1221
1191
965
1214
894
1038
1119
43
59
41
114
19
52
73
68
52
44
38
24
33
32
25
259
46
40
21
63
62
19
57
29
120
47
36
29
93
41
Sample KSH-11-05 continued:
jl24b45
2.595836
0.179188
0.210768
0.010546 0.362423 0.085515
0.001877
1299
51
1233
56
1327
42
93
1270
89
1.20
0 .2 7
jl24b47
1.809150
0.067521
0.180521
0.003818 0.283347 0.073283 0.001035
1049
24
1070
21
1022
29
105
1061
36
0.60
0 .4 4
jl24b48
2.035130
0.105295
0.193299 0.007342 0.367049 0.078176 0.000837
1127
35
1139
40
1151
21
99
1132
61
0.08
0.78
jl24b49
0.637393
0.013994
0.080218
0.001552 0.440512
0.057987 0.000424
501
9
497
9
529
16
94
499
15
0.12
0.73
jl24b50
1.706206
0.065125
0.168725 0.004472 0.347187
0.076238 0.001438
1011
24
1005
25
1101
38
91
1008
40
0.04
0.84
jl24b54
2.384649
0.176735
0.217300 0.009576 0.297305 0.082089 0.001525
1238
53
1268
51
1248
36
102
1253
83
0.23
0.63
jl24b55
2.010578
0.064515
0.188517
1119
22
1113
25
1195
19
93
1117
38
0.05
0.83
jl24b56
1.683856
0.076083
0.165053 0.005467 0.366538 0.075817
0.001587
1002
29
985
30
1090
42
90
994
49
0.28
0.60
jl24b57
2.258679
0.112380
0.205282
0.006106 0.298892 0.082225 0.005510
1199
35
1204
33
1251
131
96
1202
54
0.01
0.92
jl24b58
2.351413
0.065432
0.210823 0.003790 0.322981 0.080176 0.000942
1228
20
1233
20
1201
23
103
1231
32
0.05
0.82
jl24b60
2.215771
0.075288 0.203579 0.005553 0.401362
0.079876 0.001051
1186
24
1195
30
1194
26
100
1189
44
0.08
0.78
jl24b63
1.840960
0.132108
0.173650 0.008372 0.335919
0.077105
0.001635
1060
47
1032
46
1124
42
92
1045
77
0.27
jl24b65
2.188455
0.081959
0.192750 0.005384 0.372893 0.079814
0.001334
1177
26
1136
29
1192
33
95
1160
46
1.75
jl24b66
2.749287
0.075301 0.228225 0.004586 0.366790 0.083934 0.001016
1342
20
1325
24
1291
24
103
1336
36
0.44
0.51
jl24b68
2.362216
0.126243
0.208013 0.008287 0.372720 0.078755 0.001079
1231
38
1218
44
1166
27
104
1226
68
0.08
0.78
jl24b69
1.800333
0.175514
0.173411
0.001660
1046
64
1031
79
965
48
107
1041
117
0.04
0.85
jl24b70
2.251890
0.126458
0.198374 0.006779 0.304262 0.083296 0.001284
1197
39
1167
36
1276
30
91
1180
62
0.47
0 .4 9
0.004555 0.376498 0.079920 0.000784
0.014295 0.422773 0.071278
jl24b73
1.838251
0.049306
0.172511 0.003286
0.355118
0.073030 0.000729
1059
18
1026
18
1015
20
101
1043
jl24b74
1.944125
0.144758
0.184770 0.009085 0.330167
0.074808 0.002932
1096
50
1093
49
1063
79
103
jl24b75
2.510072
0.205402
0.215936
0.015607 0.441604
0.087714 0.002729
1275
59
1260
83
1376
60
92
jl24b76
4.810238
0.188891
0.313818
0.008623 0.349866
0.111795
0.001376
1787
33
1759
42
1829
22
96
jl24b77
2.818303
0.333279
0.231057 0.027750 0.507809 0.097613 0.004406
1360
89
1340
145
1579
84
85
jl24b78
1.282593
0.028631
0.134014
0.000421
838
13
811
15
863
13
jl24b79
1.747853
0.083969
0.169255 0.007042 0.433031 0.072120 0.000855
1026
31
1008
39
989
jl25a07
2.144959
0.067497
0.192902 0.004086 0.336526 0.084723 0.000997
1163
22
1137
22
1309
jl25a08
3.608882
0.342535
0.264101
1551
75
1511
92
jl25a09
2.137487
0.115970
0.193888 0.007296 0.346785 0.079812
0.001528
1161
38
1142
jl25a10
3.822670
0.178741 0.275730 0.009040 0.350577
0.100199
0.001027
1598
38
1570
jl25a12
2.408373
0.163066
0.207830 0.008985 0.319246
0.082501 0.002396
1245
49
jl25a13
4.229871
0.216118
0.300969 0.009282
0.301811
0.106756
0.001682
1680
jl25a14
2.020071 0.183004
0.191997
0.330130
0.078921 0.002177
jl25a17
1.834539
0.065096
jl25a18
2.303089
jl25a19
jl25a20
0.60
0 .19
30
2.68
1095
81
0.00
0.95
1272
114
0.04
0.85
1778
60
0.39
0.53
1359
176
0.03
0.87
94
828
23
3.43
0 .0 6
24
102
1021
58
0.24
0.63
23
87
1150
36
1.08
0 .3 0
1706
49
89
1537
137
0.18
0.67
39
1192
38
96
1152
63
0.18
0.67
46
1628
19
96
1588
68
0.33
0.56
1217
48
1257
57
97
1231
79
0.24
0.62
42
1696
46
1745
29
97
1687
70
0.10
0.75
1122
62
1132
62
1170
55
97
1127
101
0.02
0.89
0.177960 0.003798 0.300703 0.073834 0.001190
1058
23
1056
21
1037
33
102
1057
35
0.01
0.94
0.213670
0.203910
0.012013
0.317500
0.083432 0.001258
1213
66
1196
64
1279
29
94
1204
106
0.05
0.82
1.726297
0.037622
0.171213
0.003292
0.441178
0.073092 0.000448
1018
14
1019
18
1016
12
100
1018
26
0.00
0.98
2.421971
0.076989 0.208907
0.005119
0.385455 0.082590 0.001066
1249
23
1223
27
1260
25
97
1240
41
0.87
0 .3 5
0.002590 0.432888 0.067813
0.018081 0.360649 0.104544 0.002765
0.011484
0 .10
50
59
397
8395
58
37
146
100
97
142
129
57
106
230
90
154
125
25
41
11
105
6
119
225
99
12
26
109
28
68
142
186
63
74
45
107
249
349
2443
92
98
358
97
78
214
283
76
128
306
183
168
187
526
43
19
134
13
2353
423
265
25
84
322
34
112
140
234
252
1536
178
0.471
0.235
1.140
3.437
0.628
0.374
0.409
1.030
1.242
0.663
0.455
0.751
0.829
0.752
0.494
0.917
0.672
0.047
0.940
0.555
0.781
0.471
0.051
0.533
0.374
0.459
0.306
0.340
0.820
0.601
1.013
0.797
0.251
0.048
0.254
206
P b/ 238U
206
P b/ 238U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
206
P b/ 238U
concordia
concordia
concordia
206
P b/ 238U
206
P b/ 238U
concordia
concordia
concordia
concordia
206
P b/ 238U
concordia
206
P b/ 238U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
206
P b/ 238U
1233
1070
1132
499
1008
1253
1117
994
1202
1231
1189
1045
1136
1336
1226
1041
1167
1026
1095
1272
1778
1359
811
1021
1137
1537
1152
1588
1231
1687
1127
1057
1204
1018
1223
56
21
61
15
40
83
38
49
54
32
44
77
29
36
68
117
36
36
81
114
60
176
29
58
22
137
63
68
79
70
101
35
106
26
27
Sample KSH-11-05 continued:
jl25a21
2.240161
0.067427
0.205160 0.005056 0.409356 0.079615 0.000688
1194
21
1203
27
1187
17
101
1196
39
0.12
0.73
jl25a22
2.270937
0.055022
0.203618
0.000891
1203
17
1195
22
1201
22
100
1201
32
0.16
0.69
jl25a23
2.298675
0.133724
0.207324 0.006790 0.281507
0.082778 0.002222
jl25a24
1.617326
0.143455
0.166685
jl25a27
2.141239
0.049607
jl25a28
1.665837
jl25a29
0.004117
0.417283
0.080148
1212
41
1215
36
1264
52
96
1213
61
0.00
0.95
0.001260
977
56
994
58
991
35
100
985
93
0.07
0.79
0.196986 0.003539 0.387715
0.078479 0.000505
1162
16
1159
19
1159
13
100
1161
29
0.03
0.87
0.144253
0.170654
0.010674
0.074558 0.002290
996
55
1016
59
1057
62
96
1004
93
0.10
0.75
2.045806
0.157761
0.192741
0.010097 0.339682 0.092582 0.003387
1131
53
1136
55
1479
69
77
1133
88
0.01
0.93
jl25a30
2.572538
0.093058
0.221969 0.005335 0.332224 0.086128
0.001024
1293
26
1292
28
1341
23
96
1293
44
0.00
0.99
jl25a31
1.326024
0.082180
0.142023
0.004417 0.250921 0.077823 0.002018
857
36
856
25
1142
52
75
856
45
0.00
0.98
jl25a32
2.108847
0.065754
0.187133
0.004767 0.408476 0.080075 0.000626
1152
21
1106
26
1199
15
92
1135
39
3.10
0 .0 8
jl25a33
2.645887
0.308309 0.225306
0.021431
0.408161 0.085134 0.000685
1313
86
1310
113
1319
16
99
1312
160
0.00
0.97
jl25a34
2.592290
0.226685 0.222902
0.014333 0.367679 0.091667 0.002942
1298
64
1297
76
1460
61
89
1298
114
0.00
0.99
jl25a37
2.154716
0.074240
0.198338 0.004358 0.318835
0.078499 0.001230
1167
24
1166
23
1160
31
101
1166
38
0.00
0.99
jl25a38
2.643190
0.131888
0.225366
0.006125 0.272329
0.089161 0.001791
1313
37
1310
32
1408
38
93
1311
55
0.00
0.95
jl25a40
2.502556
0.202650
0.218426 0.008855 0.250306
0.086118 0.002026
1273
59
1274
47
1341
45
95
1273
82
0.00
0.99
jl25a41
2.326879
0.145542
0.208623 0.008496 0.325559 0.078403 0.001164
1221
44
1221
45
1157
29
106
1221
73
0.00
0.99
jl25a42
1.415124
0.044893
0.148560 0.003307 0.350824 0.069748 0.001029
895
19
893
19
921
30
97
894
31
0.01
jl25a43
2.252775
0.091449
0.195905 0.005582 0.350980 0.082589 0.001262
1198
29
1153
30
1260
30
92
1177
49
1.75
jl25a44
1.601055
0.133275
0.162252 0.008254 0.305565 0.077215
0.002131
971
52
969
46
1127
55
86
970
78
0.00
0.98
jl25a47
1.991414
0.079780
0.187171 0.005009 0.333993 0.072613
0.001305
1113
27
1106
27
1003
36
110
1109
44
0.04
0.83
jl25a48
2.496602
0.161519
0.218274 0.007548 0.267264 0.088657 0.001724
1271
47
1273
40
1397
37
91
1272
68
0.00
0.97
jl25a50
1.488924
0.189333
0.154153
0.009073 0.231427
0.081504 0.002695
926
77
924
51
1234
65
75
925
93
0.00
0.98
jl25a51
2.523799
0.090560
0.213341 0.004798 0.313390
0.085733 0.001275
1279
26
1247
25
1332
29
94
1262
42
1.13
0 .2 9
jl25a52
2.086901 0.068722
0.010469 0.354043 0.072196
0.361153
0.187778 0.004235 0.342477 0.081473
0.001019
1145
23
1109
23
1233
25
90
1127
38
1.80
0.91
0 .19
0 .18
jl25a53
2.342666
0.071601 0.205859 0.004605 0.365986 0.082612 0.000870
1225
22
1207
25
1260
21
96
1218
38
0.50
0 .4 8
jl25a54
2.139633
0.147070
0.192488 0.007828 0.295841 0.079659 0.001289
1162
48
1135
42
1189
32
95
1146
72
0.25
0.62
jl25a57
2.249847
0.129990
0.200777 0.006673 0.287620 0.085793 0.001280
1197
41
1179
36
1334
29
88
1187
61
0.14
0.71
jl25a58
1.726858
0.091149
0.174763
0.004512 0.244559 0.075823 0.001617
1019
34
1038
25
1090
43
95
1032
44
0.29
0.59
jl25a59
1.706753
0.046885
0.165859 0.003435 0.376976 0.073944 0.000617
1011
18
989
19
1040
17
95
1001
30
1.13
0 .2 9
jl25a60
2.305522
0.109075
0.207391 0.005766 0.293815
0.082563 0.001229
1214
34
1215
31
1259
29
97
1214
52
0.00
0.98
jl25a61
2.395548
0.115421
0.213192
0.007621 0.370961 0.084235 0.001913
1241
35
1246
40
1298
44
96
1243
61
0.01
0.91
jl25a62
1.832701
0.115275
0.172734
0.007192 0.330998 0.079247 0.001940
1057
41
1027
40
1178
48
87
1041
66
0.41
0.52
jl25a63
1.727703
0.122870
0.170602 0.007364 0.303475 0.077377 0.002353
1019
46
1015
41
1131
61
90
1017
69
0.00
0.95
jl25a64
1.854489
0.109534
0.179026
0.001674
1065
39
1062
39
986
47
108
1063
64
0.01
0.94
jl25a69
2.081811
0.070065
0.193365 0.003784 0.290738 0.079684 0.000901
1143
23
1140
20
1189
22
96
1141
35
0.02
0.90
0.007172 0.339153
0.071989
117 441 0.265
75 386 0.194
21
56 0.382
163 182 0.896
212 1240 0.171
46
42 1.091
52
21 2.447
315 360 0.876
68
88 0.781
422 838 0.504
618 1169 0.529
22
42 0.512
94 165 0.571
67
69 0.973
120 113 1.069
75 246 0.306
148 277 0.535
97 193 0.503
47
40 1.169
72 103 0.702
37 109 0.338
42
40 1.034
94 159 0.591
161 273 0.587
66 201 0.327
141 210 0.673
75 178 0.422
87
88 0.990
144 567 0.253
52 133 0.388
16
45 0.351
65
47 1.376
67
45 1.480
84
69 1.218
117 208 0.563
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
206
P b/ 238U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
206
P b/ 238U
concordia
concordia
concordia
concordia
206
P b/ 238U
206
P b/ 238U
206
P b/ 238U
concordia
concordia
concordia
206
P b/ 238U
concordia
concordia
concordia
concordia
concordia
concordia
1196
1201
1213
985
1161
1004
1133
1293
856
1106
1312
1298
1166
1311
1273
1221
894
1153
970
1109
1272
925
1247
1109
1207
1146
1187
1032
989
1214
1243
1041
1017
1063
1141
39
32
61
93
29
93
88
44
45
52
160
114
38
55
82
73
31
30
78
44
68
93
25
23
25
72
61
44
19
52
61
66
69
64
35
Sample KSH-11-05 continued:
jl25a70
2.216672
0.193531 0.200665 0.009853
1186
61
1179
53
1263
43
93
1182
90
0.01
0.91
jl25a71
2.168207
0.121740
0.198619
0.001607
1171
39
1168
36
1217
39
96
1169
61
0.00
0.95
jl25a72
1.802075
0.084514
0.175021 0.004864 0.296274 0.072654 0.001432
1046
31
1040
27
1004
40
104
1042
46
0.04
0.85
jl25a73
2.157151
0.073823
0.193968 0.005246 0.395175
0.079057 0.000950
1167
24
1143
28
1174
24
97
1158
43
0.72
0 .4 0
jl25a77
2.013143
0.095947
0.193745 0.005826 0.315454
0.074062 0.001429
1120
32
1142
31
1043
39
109
1131
51
0.34
0.56
jl25a78
2.296789
0.085993 0.205529 0.004893 0.317947
0.081861 0.001102
1211
26
1205
26
1242
26
97
1208
43
0.04
0.84
jl25a79
2.324357
0.149126
0.206004 0.007473 0.282698 0.082802 0.001332
1220
46
1207
40
1265
31
95
1212
68
0.06
0.81
jl25a80
2.231241
0.072103
0.205828 0.004290 0.322496 0.081742 0.000869
1191
23
1207
23
1239
21
97
1199
37
0.35
0.55
jl25a49
0.807496
0.081076
0.130845 0.008627 0.328325 0.049033 0.001666
601
46
793
49
149
80
530
675
74
12.42 0 .0 0
jl24b40
0.943382
0.155924
0.145789
0.061971 0.002537
675
81
877
60
673
88
13 0
801
102
5.52
0 .0 2
jl24b04
1.415761
0.167050
0.128747 0.009740 0.320585 0.089543 0.002554
896
70
781
56
1416
55
55
814
102
2.27
0 .13
jl24b43
1.460504
0.139630
0.135748
0.008116
0.312662
0.085290 0.002491
914
58
821
46
1322
57
62
849
83
2.23
0 .14
jl25a68
1.211083
0.137919
0.149534
0.007175 0.210684
0.063806 0.001386
806
63
898
40
735
46
12 2
874
73
1.98
0 .16
jl25a11
1.499542
0.180305
0.139496
0.010927 0.325746 0.089944 0.004456
930
73
842
62
1424
95
59
872
110
1.21
0 .2 7
0.281190
0.082727 0.001821
0.006765 0.303293 0.080819
0.010670
0.221401
65
59
70
80
79
51
29
103
99
85
114
254
63
174
149
324
0.654
0.693
0.612
0.314
1.260
0.292
0.194
0.318
concordia
concordia
concordia
37
38
37
33
61
13
36
31
45
38
63
16
1.045
1.207
0.834
0.874
0.962
0.818
not used
not used
not used
not used
not used
not used
206
P b/ 238U
concordia
concordia
concordia
concordia
1182
1169
1042
1143
1131
1208
1212
1199
90
61
46
28
51
43
68
37
Sample KSH-11-08:
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
±1σ
Rho
Pb
206
Pb
207
±1σ
Pb ±1σ
235
U (Ma)
206
Pb ±1σ
238
U (Ma)
207
206
Pb ±1σ U/Pb Concordia M SWD P ro b. 232 Th 238 U
Pb (Ma) Pb/Pb age ±2σ (Ma)(of concordance)
(ppm) (ppm) Th/U
(a)
(b)
(c)
Age used Age ±2σ (Ma)
(d)
(e)
Sample KSH-11-08 (37.99697°N, 78.11893°W)
jl25b05
2.038649
0.069252
0.194593
0.005231 0.395649 0.078324 0.000682
1129
23
1146
28
1155
17
99
1134
42
0.38
0.54
jl25b06
1.729269
0.193431
0.172129
0.011925
1019
72
1024
66
1184
75
86
1022
111
0.00
0.96
jl25b07
2.964258
0.110060
0.239820 0.006739 0.378388 0.091720
0.001191
1399
28
1386
35
1462
25
95
1394
51
0.13
0.72
jl25b08
2.075148
0.095565
0.193738 0.005580
0.080875 0.001034
1141
32
1142
30
1218
25
94
1141
50
0.00
0.98
jl25b09
1.477460
0.116032
0.175644 0.007252 0.262869 0.072328 0.002162
921
48
1043
40
995
61
105
992
67
5.43
0 .0 2
jl25b10
1.557973
0.068125
0.160308 0.004028 0.287282 0.071883
0.001278
954
27
958
22
983
36
98
957
39
0.03
0.87
jl25b11
2.615225
0.196137
0.223272
0.347026 0.092253 0.002995
1305
55
1299
61
1473
62
88
1302
95
0.01
0.93
jl25b12
2.231701
0.158016
0.204008 0.007767 0.268861 0.088255 0.002923
1191
50
1197
42
1388
64
86
1195
72
0.01
0.92
jl25b15
1.640195
0.170932
0.163498
0.013522 0.396813
0.081204 0.003038
986
66
976
75
1226
73
80
982
117
0.02
0.90
jl25b16
1.922559
0.050193
0.184041
0.003313 0.344739 0.078555 0.000658
1089
17
1089
18
1161
17
94
1089
29
0.00
1.00
jl25b17
2.201441
0.061948
0.204962
0.003381 0.293147
0.080006 0.000860
1182
20
1202
18
1197
21
100
1193
30
0.83
0 .3 6
jl25b18
2.013242
0.301445
0.188325
0.018827 0.333835 0.082255 0.003269
1120
102
1112
102
1252
78
89
1116
167
0.00
0.95
jl25b19
2.250020
0.095720
0.203713 0.005597 0.322909 0.082276 0.001566
1197
30
1195
30
1252
37
95
1196
49
0.00
0.96
jl25b20
2.170041
0.061874
0.197788 0.004244 0.376291 0.080347 0.000815
1171
20
1163
23
1206
20
97
1168
35
0.11
0.74
jl25b21
2.439764
0.150422
0.220418 0.008499 0.312709
0.080119
0.001540
1254
44
1284
45
1200
38
107
1269
72
0.32
0.57
jl25b22
2.123743
0.078667
0.199389 0.005837 0.395154
0.077922 0.000946
1157
26
1172
31
1145
24
102
1162
46
0.24
0.62
jl25b25
1.785747
0.231407
0.174057
0.013212
0.292881 0.082340 0.002368
1040
84
1034
73
1254
56
83
1037
125
0.00
0.95
jl25b27
2.463517
0.099103
0.216183
0.006653 0.382508 0.081337
0.000931
1261
29
1262
35
1230
22
103
1261
52
0.00
0.99
jl25b28
2.974993
0.135915
0.250580
0.006216 0.271480
0.088655 0.001533
1401
35
1441
32
1397
33
103
1423
53
1.00
0 .3 2
jl25b29
2.050362
0.214348
0.191816
0.010479 0.261288
0.081773 0.002000
1132
71
1131
57
1240
48
91
1132
99
0.00
0.99
jl25b31
1.488460
0.041243
0.153103
0.003274 0.385875 0.072416
jl25b32
4.155259
0.248441
0.293531 0.012522 0.356753
jl25b35
2.130747
0.123118
0.195937
jl25b36
1.735995
0.180842
0.170524
jl25b37
1.770806
0.142019
0.174008
jl25b38
1.977010
0.088560
0.186959 0.005333 0.318370
0.071423
jl25b40
2.001279
0.134317
0.186213
0.009793 0.391799
jl25b41
1.634222
0.115213
0.165145
0.007442
jl25b42
2.120546
jl25b45
2.114478
0.011622
0.309689 0.079489 0.003029
0.312712
0.000501
926
17
918
18
998
14
92
922
29
0.14
0.71
0.001211
1665
49
1659
62
1735
21
96
1663
89
0.01
0.92
0.006215 0.274455 0.078783 0.001462
1159
40
1153
33
1167
37
99
1155
58
0.01
0.90
0.009501 0.267425 0.083269 0.002548
1022
67
1015
52
1276
60
80
1017
93
0.01
0.92
0.011038
1035
52
1034
61
1086
60
95
1035
93
0.00
0.99
0.001258
1108
30
1105
29
970
36
114
1106
48
0.01
0.93
0.076755 0.001782
1116
45
1101
53
1115
46
99
1110
81
0.08
0.78
0.319601 0.069768 0.002056
983
44
985
41
922
61
107
984
69
0.00
0.97
0.156519
0.196740 0.009538 0.328407 0.075586 0.001983
1156
51
1158
51
1084
53
107
1157
83
0.00
0.97
0.087626
0.194755 0.004720 0.292441 0.077489 0.001638
1154
29
1147
25
1134
42
101
1150
43
0.04
0.84
0.106188
0.395486 0.075643 0.002265
56
21
92
175
526
29
184
204
0.107
0.719
0.497
0.858
concordia
concordia
concordia
concordia
1134
1022
1394
1141
42
111
51
50
11
43
21
4
15
161
45
169
23
20
19
462
0.253
0.253
0.905
0.174
0.832
0.349
206
Pb/238 U
concordia
concordia
concordia
concordia
concordia
1043
957
1302
1195
982
1089
80
39
95
72
117
29
257
25
25
94
90
56
20
71
502
38
95
364
177
271
49
259
0.513
0.665
0.263
0.258
0.506
0.206
0.407
0.273
206
Pb/238 U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
1202
1116
1196
1168
1269
1162
1037
1261
36
167
49
35
72
46
125
52
51
53
36
56
47
32
15
64
83
42
13
39
101
75
1021
139
132
48
37
209
65
77
43
76
0.503
0.708
0.036
0.400
0.354
0.664
0.412
0.308
1.283
0.545
0.298
0.516
206
1441
1132
922
1663
1155
1017
1035
1106
1110
984
1157
1150
64
99
29
89
58
93
93
48
81
69
83
43
Pb/238 U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
Sample KSH-11-08 continued:
0.64
81
21
64
77
63
36
45
70
49
20
39
16
95
216
84
129
645
161
60
84
169
84
53
64
57
235
0.376
0.247
0.494
0.119
0.393
0.597
0.528
0.414
0.590
0.369
0.601
0.282
0.406
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
0 .2 0
62
224
0.277
206
1.40
0 .2 4
0.00
0.98
571
178
0.095
0.368
206
43
54
65
47
1.27
0 .2 6
65
109
jl25b46
2.105019
0.102674
0.195086 0.005949 0.312604
0.080306 0.001325
1150
34
1149
32
1205
32
95
1150
53
0.00
0.97
jl25b47
2.157468
0.109380
0.195535 0.006620 0.333890 0.078346 0.001753
1167
35
1151
36
1156
44
100
1159
58
0.16
0.69
jl25b48
1.808174
0.073520
0.176797 0.004735 0.329376 0.077632 0.001253
1048
27
1049
26
1137
32
92
1049
43
0.00
0.97
jl25b50
1.754942
0.051122
0.171062
0.073802 0.000631
1029
19
1018
23
1036
17
98
1025
34
0.24
0.63
jl25b51
2.238459
0.105496
0.204161 0.005745 0.298548 0.082462 0.001272
1193
33
1198
31
1257
30
95
1196
51
0.01
0.91
jl25b52
2.158635
0.134268
0.197804 0.009242 0.375579 0.081842
1168
43
1164
50
1242
46
94
1166
76
0.01
0.93
jl25b55
2.975238
0.116290
0.246566
0.084855 0.001387
1401
30
1421
37
1312
32
108
1408
54
0.26
0.61
jl25b56
2.671046
0.091295
0.227275 0.005588 0.359693 0.086921 0.001203
1320
25
1320
29
1359
27
97
1320
45
0.00
0.99
jl25b57
1.536628
0.233995
0.157918
0.008867 0.184370
0.081262 0.002090
945
94
945
49
1228
50
77
945
93
0.00
1.00
jl25b58
1.858727
0.220225
0.179902 0.009858 0.231249
0.082551 0.002677
1067
78
1066
54
1259
63
85
1066
97
0.00
1.00
jl25b59
2.100359
0.144324
0.194669 0.007342 0.274427 0.084458 0.002250
1149
47
1147
40
1303
52
88
1147
68
0.00
0.97
jl25b60
2.004734
0.211409
0.190012
0.082459 0.002035
1117
71
1121
51
1256
48
89
1120
92
0.00
0.96
jl25b61
2.005800
0.087035
0.186338 0.005224 0.323077 0.078306 0.001005
1117
29
1102
28
1155
25
95
1109
47
0.22
jl25b62
1.634893
0.061552
0.158820 0.003486 0.291462
0.073343
0.001101
984
24
950
19
1023
30
93
962
34
1.65
jl25b65
1.771235
0.035371
0.170769 0.002900 0.425194
0.074303 0.000681
1035
13
1016
16
1050
18
97
1029
24
jl25b66
2.045007
0.098339
0.191549
0.004503 0.244421 0.080781 0.001144
1131
33
1130
24
1216
28
93
1130
jl25b67
3.723520
0.124355
0.269653 0.005988 0.332450
1576
27
1539
30
1645
25
94
1561
0.004102
0.411631
0.007167 0.371849
0.009425 0.235177
0.101154
0.001932
0.001366
39
1016
1130
32
43
0.597
206
1539
61
Pb/ U
concordia
concordia
1239
1406
1131
59
51
54
62
86
95
216
0.651
0.400
206
1668
1031
103
43
0 .12
13
41
0.323
206
Pb/238 U
983
75
1.03
0 .3 1
1.00
74
60
0.534
0.464
206
0.00
40
28
Pb/238 U
concordia
1164
1354
74
142
43
1.31
0 .2 5
0.32
0.57
99
95
371
368
0.267
0.257
206
43
Pb/238 U
concordia
1144
1163
50
43
48
1.11
0 .2 9
67
92
0.730
206
1077
56
975
1117
78
111
0.005576 0.328285 0.085950 0.001461
1285
29
1239
30
1337
33
93
1262
48
1.77
0.243925 0.005560 0.227972 0.093525 0.001458
1405
38
1407
29
1499
29
94
1406
51
0.00
jl25b71
2.080229
0.103072
0.190075 0.005972 0.317065
0.077730 0.001565
1142
34
1122
32
1140
40
98
1131
54
0.28
0.60
jl25b72
3.841511
0.256613
0.295333
0.010388 0.263279 0.098867 0.001674
1601
54
1668
52
1603
32
104
1635
83
1.10
0 .2 9
jl25b75
1.789223
0.073054
0.171759
0.004726 0.336963 0.076273 0.000996
1042
27
1022
26
1102
26
93
1031
43
0.42
0.52
jl25b76
1.435875
0.111208
0.164657 0.006776 0.265678 0.069880 0.002045
904
46
983
38
925
60
106
952
64
2.42
jl25b77
2.020000
0.103234
0.197881 0.006862 0.339255 0.077979 0.001822
1122
35
1164
37
1146
46
102
1141
58
jl25b78
2.792864
0.359024 0.233703
0.016027 0.266732 0.093541 0.002239
1354
96
1354
84
1499
45
90
1354
142
jl25b79
1.970053
0.089781
0.194210
0.004622
0.261135
0.073824 0.000840
1105
31
1144
25
1037
23
110
1130
jl25b80
2.114749
0.082946
0.199265 0.004967 0.317757
0.075574 0.000996
1154
27
1171
27
1084
26
108
1163
jl25b81
1.996420
0.093276
0.181788
0.076911 0.001516
1114
32
1077
28
1119
39
96
1092
0 .18
0.95
jl25b82
1.707572
0.114279
0.163368 0.007046 0.322225 0.074806 0.001786
1011
43
975
39
1063
48
92
990
67
0.56
0 .4 5
jl25b85
2.010834
0.220281
0.189001
0.011952
1119
74
1116
65
1280
63
87
1117
111
0.00
0.97
jl25b86
1.800394
0.064996
0.165753
0.003691 0.308415
1046
24
989
20
1152
31
86
1010
36
4.71 0 .0 3
238
Pb/238 U
concordia
Pb/238 U
68
28
106
41
0.642
0.691
206
238
131
150
0.869
206
Pb/238 U
989
41
Pb/238 U
1189
84
Pb/238 U
concordia
concordia
909
1082
940
60
51
50
Pb/ U
concordia
jl25b87
2.492190
0.120654
0.202563
0.007791 0.397218
0.085945 0.001520
1270
35
1189
42
1337
34
89
1239
64
3.57
0 .0 6
32
104
0.306
206
jl25b88
1.322597
0.088812
0.151410
0.005335 0.262367 0.069370 0.001915
856
39
909
30
910
57
100
890
52
1.62
0 .2 0
1.915364
0.097158
0.182095 0.005465 0.295825 0.076552 0.001593
1086
34
1078
30
1110
42
97
1082
51
0.04
0.83
jl25b90
1.533583
0.085742
0.156442
944
34
937
29
1023
42
92
940
50
0.03
0.85
63
84
95
0.476
0.214
0.678
206
jl25b89
30
18
64
0.005138 0.293695 0.073343 0.001522
Pb/238 U
0.520
0.691
0.189
0.211987
0.149395
0.001210
950
Pb/238 U
concordia
97
130
100
0.101963
2.988429
0.078212
Pb/238 U
50
90
19
2.544982
jl25b70
0.288625 0.083472 0.002691
53
58
43
34
51
76
54
45
93
97
68
92
47
206
jl25b68
0.005170 0.304322
1150
1159
1049
1025
1196
1166
1408
1320
945
1066
1147
1120
1109
Sample KSH-11-08 continued:
jl25b91
2.832863
0.303117
0.225343
0.019166
0.397444 0.090076 0.002735
1364
80
1310
101
1427
58
92
1346
149
0.29
0.59
42
41
1.014
concordia
1346
149
jl25b92
2.481878
0.123229
0.211409
0.006076 0.289406 0.087726 0.001544
1267
36
1236
32
1376
34
90
1249
55
0.55
0 .4 6
37
73
0.502
206
Pb/238 U
1236
65
0.013433 0.460159
0.278484 0.001513
3283
22
3161
53
3354
8
94
3285
45
6.82
0 .0 1
0.071418
0.001478
972
61
993
58
969
42
102
983
96
0.10
0.76
0.54
338
113
745
248
102
541
0.813
0.732
0.190
0.728
0.936
0.244
207
0.010454 0.322802
275
83
142
180
95
132
Pb/206 Pb
concordia
concordia
concordia
concordia
concordia
3354
983
1184
1292
1210
1118
17
96
34
38
55
41
35
54
92
13
33
13
14
96
1689
202
183
521
67
40
54
1289
0.020
0.266
0.503
0.024
0.486
0.337
0.262
0.074
206
Pb/238 U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
753
1443
1453
1110
1006
1300
1351
1043
41
47
45
39
61
97
68
32
76
187
0.410
206
Pb/238 U
1660
70
23
86
13 208
49 155
110 252
113 1062
0.268
0.064
0.313
0.437
0.106
206
Pb/238 U
concordia
concordia
concordia
concordia
1083
1093
1158
1146
1010
108
49
53
34
29
87
17
65
212
51
121
0.409
0.336
0.537
206
Pb/238 U
concordia
concordia
1445
1054
1139
60
76
52
64
80
41
12
41
43
27
34
162
156
71
28
42
183
80
820
0.393
0.516
0.576
0.424
0.984
0.234
0.342
0.041
206
Pb/238 U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
1481
1242
1315
1240
910
1127
1445
1069
66
39
60
86
118
42
70
99
1106 740
46 109
1.495
0.423
206
1227
1018
55
56
jl25b96
24.363834 0.561851 0.632949
jl25b97
1.603731
0.155916
jl25b98
2.227899
0.060833 0.200073
0.004145 0.379401 0.081090 0.000607
1190
19
1176
22
1224
15
96
1184
34
0.37
jl25b99
2.599726
0.081678
0.220131 0.004523 0.326987 0.086343 0.000851
1301
23
1283
24
1346
19
95
1292
38
0.43
0.51
jl25b100
2.303940
0.106054
0.205853 0.006539 0.345045 0.082509 0.001610
1214
33
1207
35
1258
38
96
1210
55
0.03
0.86
jl25b101
2.020542
0.069317
0.188159
0.079292 0.000728
1122
23
1111
26
1179
18
94
1118
41
0.16
0.69
jl25b102
1.202448
0.044164
0.123968 0.003546 0.389387 0.070090 0.000628
802
20
753
20
931
18
81
777
34
4.57
0 .0 3
jl25b105
3.161900
0.105142
0.249146
0.006143 0.370735 0.090044 0.001100
1448
26
1434
32
1426
23
101
1443
47
0.18
0.67
jl25b106
3.208820
0.102128
0.250336
0.006125 0.384373 0.093158
0.001093
1459
25
1440
32
1491
22
97
1453
45
0.36
0.55
jl25b108
1.982419
0.061085
0.187829 0.005068 0.437798 0.075739 0.000683
1110
21
1110
28
1088
18
102
1110
39
0.00
1.00
jl26b05
1.709340
0.097082
0.167679 0.006829 0.358535 0.070095 0.001661
1012
36
999
38
931
49
107
1006
61
0.09
0.76
jl26b06
2.661773
0.229416
0.220884
0.010908 0.286480 0.080614 0.003229
1318
64
1287
58
1212
79
106
1300
97
0.19
0.67
jl26b07
2.772923
0.175687
0.233601 0.007659 0.258749 0.093841 0.002507
1348
47
1353
40
1505
50
90
1351
68
0.01
0.92
jl26b08
1.795532
0.047484
0.175330 0.003969 0.428015
0.073497 0.000532
1044
17
1041
22
1028
15
101
1043
32
0.01
jl26b09
3.753550
0.155359
0.293794 0.007000 0.287809 0.093753 0.001332
1583
33
1660
35
1503
27
110
1617
54
3.69
0.166562
0.004791 0.371143
jl26b10
1.721870
0.161445
0.182988 0.009897 0.288428 0.076317
0.002194
1017
60
1083
54
jl26b11
1.934404
0.089647
0.184605 0.005480 0.320245 0.076216
0.001198
jl26b12
2.137017
0.088295
0.195684 0.006597 0.407989 0.078471 0.001355
1093
31
1092
30
1161
29
1152
36
jl26b15
2.096704
0.059655
0.194158
0.004060 0.367445 0.078723 0.000943
1148
20
1144
22
jl26b16
1.709556
0.044623
0.169143
0.003357 0.380182
0.073800 0.000686
1012
17
1007
jl26b17
3.017719
0.081731
0.251313
0.005798 0.425909 0.087027 0.000982
1412
21
jl26b18
1.846322
0.151740
0.176896 0.007827 0.269189
1062
jl26b19
2.087472
0.113738
0.192735 0.005476
jl26b20
3.156928
0.128275
0.258322 0.006437 0.306639 0.091736
jl26b21
2.408992
0.078811
0.211687
jl26b22
2.673943
0.122308
jl26b25
2.409061
0.175159
jl26b26
1.457494
jl26b27
0.083729 0.002766
1103
0.91
0 .0 5
57
98
1054
90
0.97
0 .3 3
1101
31
99
1093
49
0.00
0.98
1159
34
99
1158
53
0.06
0.80
1165
24
98
1146
34
0.03
0.87
19
1036
19
97
1010
29
0.06
1445
30
1361
22
106
1419
39
1.38
0 .2 4
54
1050
43
1286
64
82
1054
76
0.04
0.84
0.81
1145
37
1136
30
1155
38
98
1139
52
0.04
0.84
0.001476
1447
31
1481
33
1462
31
101
1462
52
0.84
0 .3 6
0.082075 0.001283
1245
23
1238
24
1247
31
99
1242
39
0.07
0.79
0.224248 0.007466 0.363942 0.085541 0.001857
1321
34
1304
39
1328
42
98
1315
60
0.17
0.68
0.211243
0.009914 0.322747 0.088458 0.003038
1245
52
1235
53
1392
66
89
1240
86
0.03
0.87
0.170970
0.151066
0.012851
0.362611 0.071990 0.002654
913
71
907
72
986
75
92
910
118
0.01
0.94
2.037738
0.080498
0.190773 0.004595 0.304840 0.076258 0.001425
1128
27
1126
25
1102
37
102
1127
42
0.01
0.93
jl26b28
3.209140
0.188044
0.249217 0.008079 0.276622 0.094645 0.002061
1459
45
1434
42
1521
41
94
1445
70
0.22
0.64
jl26b29
1.887006
0.172077
0.178852
1077
61
1061
61
1110
22
96
1069
99
0.05
0.82
jl26b30
2.457758
0.073638 0.209683
0.084598 0.000652
1260
22
1227
28
1306
15
94
1250
40
1.44
0 .2 3
jl26b31
1.732921
0.105862
0.170770 0.005753 0.275738 0.076662 0.001740
1021
39
1016
32
1112
45
91
1018
56
0.01
0.92
0.260711 0.078328 0.001485
0.004560 0.329210
0.011082
0.339730 0.076557 0.000858
0.005182 0.412462
Pb/238 U
concordia
Sample KSH-11-08 continued:
245
45
134
36
1.832
1.251
concordia
concordia
1294
1240
55
101
66
40
25
101
341
78
57
230
0.194
0.520
0.430
0.438
206
990
1005
1361
1130
46
66
119
54
67
189
0.861
0.398
206
0.85
57
75
994
960
71
61
0 .4 6
26
57
0.452
206
Pb/238 U
1218
74
Pb/238 U
998
66
Pb/238 U
concordia
concordia
993
1109
1266
65
72
92
jl26b32
2.579015
0.114372
0.221958 0.006684 0.339519
0.086716
0.001640
1295
32
1292
35
1354
36
95
1294
55
0.00
0.95
jl26b35
2.469325
0.214799
0.208455
0.011468
0.084868 0.003146
1263
63
1221
61
1313
72
93
1240
101
0.34
0.56
jl26b36
1.743673
0.059661
0.165934
0.004144 0.364926 0.074935 0.000963
1025
22
990
23
1067
26
93
1008
37
1.91
jl26b37
1.700726
0.142675
0.168496
0.006581 0.232770 0.070664 0.002200
1009
54
1004
36
948
64
106
1005
66
0.01
0.93
jl26b39
2.892250
0.255474 0.229877
0.014745 0.363091 0.094597 0.002442
1380
67
1334
77
1520
49
88
1361
119
0.32
0.57
jl26b40
2.056277
0.094978
0.190424
0.006217 0.353435 0.076955 0.001291
1134
32
1124
34
1120
33
100
1130
54
0.08
0.77
jl26b41
1.529798
0.098855
0.166733 0.006447 0.299206 0.071249
0.001859
942
40
994
36
965
53
103
971
60
1.36
0 .2 4
jl26b42
1.589273
0.115418
0.159994
0.006106 0.262754 0.077179
0.001651
966
45
957
34
1126
43
85
960
61
0.04
jl26b45
2.439642
0.148288
0.208003
0.006891 0.272507 0.090095 0.002503
1254
44
1218
37
1428
53
85
1232
64
0.54
0.316208
0 .17
jl26b46
1.760776
0.090291
0.167490 0.005984 0.348363 0.076513 0.000942
1031
33
998
33
1109
25
90
1014
55
0.75
0 .3 9
jl26b47
1.789098
0.130693
0.166457 0.005903 0.242746 0.079588 0.002265
1041
48
993
33
1187
56
84
1005
60
0.91 0 .3 4
jl26b48
2.006818
0.125817
0.185778 0.008208 0.352347 0.077676 0.001790
1118
42
1098
45
1139
46
96
1109
72
0.15
0.70
jl26b49
2.488565
0.223648
0.216767 0.009993 0.256486 0.085531 0.001326
1269
65
1265
53
1328
30
95
1266
92
0.00
0.96
jl25b49
2.384675
0.101898
0.233995 0.006270 0.313528
0.074388 0.001029
1238
31
1355
33
1052
28
12 9
1287
50
10.15 0 .0 0
jl25b95
1.185403
0.027079
0.119383
0.002785 0.510659
0.070037 0.000401
794
13
727
16
929
12
78
775
24
21.32 0 .0 0
jl26b38
1.291229
0.129410
0.166286 0.009634 0.289050
0.061981 0.002478
842
57
992
53
673
86
14 7
917
86
5.33
0 .0 2
Pb/238 U
concordia
concordia
concordia
Pb/238 U
concordia
85
459
0.185
206
77
52
123
86
114
273
0.890
0.459
0.452
206
45 317 0.143
608 2603 0.234
15
24 0.636
not used
not used
not used
Sample KSH-11-16:
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
±1σ
Rho
Pb
206
Pb
207
±1σ
Pb ±1σ
235
U (Ma)
206
Pb ±1σ
238
U (Ma)
207
206
Pb ±1σ U/Pb Concordia M SWD P ro b. 232 Th 238 U
Pb (Ma) Pb/Pb age ±2σ (Ma)(of concordance)
(ppm) (ppm) Th/U
(a)
(b)
101
1529
(c)
Age used Age ±2σ (Ma)
(d)
(e)
Sample KSH-11-16 (38.48978°N, 77.46853°W)
KSH_1
1.701435
0.030844
0.168613
0.002550 0.908371
0.073191 0.000564
1009
12
1004
14
999
16
27
30.16 0 .0 0
KSH_2
2.895598
0.048090 0.242635 0.003287 0.906372 0.086560 0.000621
1381
12
1400
17
1331
14
105
1529
27
30.16 0 .0 0
KSH_3
2.982528
0.052640 0.238303 0.003496 0.909706 0.090780 0.000677
1403
13
1378
18
1423
14
97
1529
27
30.16 0 .0 0
KSH_4
1.929560
0.032921
0.179243 0.002495 0.902067 0.078082 0.000586
1091
11
1063
14
1129
15
94
1529
27
30.16 0 .0 0
KSH_5
1.786047
0.028789
0.178372 0.002357 0.915030
0.072628 0.000485
1040
10
1058
13
983
14
108
1529
27
30.16 0 .0 0
KSH_6
1.718462
0.030671
0.169197
0.002458 0.893637 0.073669 0.000599
1015
11
1008
14
1012
17
100
1529
27
30.16 0 .0 0
KSH_7
1.778440
0.032952
0.165007 0.002444 0.876231 0.078176 0.000707
1038
12
985
14
1131
18
87
1529
27
30.16 0 .0 0
KSH_8
1.642439
0.052521
0.158368 0.004848 0.973490 0.075224 0.000552
987
20
948
27
1044
14
91
1529
27
30.16 0 .0 0
KSH_9
2.702806
0.050891 0.226389 0.003630
KSH_10
1.928979
0.032175
KSH_B1
1.820151
KSH_B3
KSH_B4
0.918153
0.086595 0.000655
1329
14
1316
19
1326
14
99
1529
27
30.16 0 .0 0
0.181177
0.002484 0.910962
0.077225 0.000544
1091
11
1073
14
1108
14
97
1529
27
30.16 0 .0 0
0.028697
0.177446
0.001826 0.826818
0.074412
0.000691
1053
10
1053
10
1090
18
97
1053
19
0.00
2.853807
0.052145
0.236887 0.003068 0.825373 0.087395 0.000921
1370
14
1370
16
1401
20
98
1370
27
0.01
0.94
3.038499
0.044193
0.242104
1417
11
1398
11
1477
17
95
1407
21
9.17
0 .0 0
0.002135 0.828469 0.091046 0.000798
0.96
0.001508
2514
17
2423
30
2597
14
93
2569
27
30.56 0 .0 0
3.255247
0.065091 0.256687 0.003933 0.856479 0.091999 0.000964
1470
15
1473
20
1503
19
98
1470
31
0.05
2.211889
0.040047
1185
13
1143
14
1289
18
89
1178
25
34.17 0 .0 0
KSH_B5
10.889528 0.204404 0.456336 0.006759 0.891794
KSH_B6
KSH_B7
0.193959 0.002620 0.861224
0.173112
0.082729 0.000781
0.82
KSH_B8
1.824072
0.025217
0.184030
0.001466 0.836620 0.071904 0.000603
1054
9
1089
8
1009
17
108
1082
16
49.96 0 .0 0
KSH_B9
2.437295
0.037113
0.210955 0.002040 0.827730 0.083815 0.000757
1254
11
1234
11
1308
17
94
1243
21
9.48
0 .0 0
KSH_B10
1.545271
0.022911
0.156756
949
9
939
8
1002
18
94
940
16
3.60
0 .0 6
0.001427 0.824512
0.071513 0.000640
KSH_C2
2.032193
0.033482
0.186541
0.002115
1126
11
1103
11
1224
23
90
1115
22
11.37
0 .0 0
KSH_C3
1.737682
0.026475
0.171530
0.001780 0.831329
0.073477 0.000645
1023
10
1021
10
1047
18
97
1022
19
0.13
0.72
KSH_C4
3.219486
0.050232
0.252174 0.002688 0.823865 0.092599 0.000844
1462
12
1450
14
1502
17
97
1460
24
2.40
0.808705 0.079015 0.000782
0 .12
KSH_C5
1.603938
0.087818
0.153676
0.008216 0.979071 0.075701 0.000844
972
34
922
46
1089
18
85
1061
37
11.35
KSH_C6
2.224813
0.044519
0.194025
0.003150 0.879402 0.083168 0.000800
1189
14
1143
17
1284
17
89
1198
28
31.77 0 .0 0
KSH_C7
1.771728
0.027645
0.178925
0.001938 0.833742 0.071820 0.000638
1035
10
1061
11
993
17
107
1044
20
18.77 0 .0 0
KSH_C9
3.103016
0.049195
0.248063 0.002735 0.828956 0.090728 0.000827
1433
12
1428
14
1475
17
97
1433
24
0.39
KSH_C10
2.954802
0.044660 0.227739 0.002295 0.821845
0.094105 0.000840
1396
11
1323
12
1530
17
86
1362
23
KSH_D1
1.841834
0.029483
0.178477 0.002049 0.831098
0.074851 0.000680
1061
10
1059
11
1051
17
101
1060
21
0.09
KSH_D3
2.993236
0.051882
0.235203
0.092305 0.000854
1406
13
1362
16
1459
17
93
1410
26
26.98 0 .0 0
KSH_D5
1.983703
0.031717
0.003101 0.850174
0.184926 0.002070 0.814337
0.077805 0.000736
1110
11
1094
11
1124
19
97
1103
21
0 .0 0
0.53
107.91 0 .0 0
5.75
0.77
0 .0 2
Not reported
206
Pb/238 U
1004
28
for this sample.
206
Pb/238 U
1400
34
206
Pb/238 U
1378
36
206
Pb/238 U
1063
27
206
Pb/238 U
1058
26
206
Pb/238 U
1008
27
206
238
Pb/
U
985
27
206
Pb/238 U
948
54
206
Pb/238 U
1316
38
Pb/238 U
concordia
concordia
1073
1053
1370
27
19
27
206
Pb/238 U
1398
22
Pb/206 Pb
concordia
2597
1470
27
31
206
Pb/238 U
1143
28
206
Pb/238 U
1089
16
206
Pb/238 U
1234
22
206
Pb/238 U
939
16
Pb/ U
concordia
1103
1022
23
19
206
Pb/238 U
1450
28
206
Pb/238 U
922
91
206
Pb/238 U
1143
34
206
Pb/238 U
concordia
1061
1433
21
24
206
Pb/238 U
concordia
1323
1060
24
21
206
Pb/238 U
1362
32
206
Pb/238 U
1094
22
206
207
206
238
Sample KSH-11-16 continued:
KSH_D6
3.294166
0.050285
0.259541 0.002789 0.835636 0.092059 0.000794
1480
12
1487
14
1463
17
102
1480
24
0.99
0 .3 2
0.083507 0.001083
1163
15
1101
17
1301
18
85
1149
31
36.98 0 .0 0
0.080318
0.000819
1155
12
1128
13
1205
21
94
1147
24
11.79
0.002164 0.792562 0.079072 0.000817
1126
11
1102
12
1178
19
94
1115
22
10.74 0 .0 0
0.040106
0.212783 0.002406 0.828355 0.086057 0.000782
1279
11
1244
13
1338
18
93
1270
23
24.18 0 .0 0
0.030503
0.191758
1133
10
1131
11
1134
18
100
1132
20
0.084509 0.000913
1230
13
1188
15
1309
21
91
1222
26
22.56 0 .0 0
0.035029
0.196545 0.002296 0.800053 0.078913 0.000784
1161
11
1157
12
1195
19
97
1160
22
0.37
0.048804
0.169582
1052
17
1010
23
1142
18
88
1085
31
21.06 0 .0 0
KSH_D7
2.145050
0.047504
0.186314
0.003197
KSH_D8
2.117679
0.036916
0.191238
0.002429 0.815474
KSH_D9
2.031934
0.034003
0.186387
KSH_D10
2.524603
KSH_E1
2.052242
KSH_E2
2.358861 0.043235 0.202443 0.002788 0.810082
KSH_E3
2.138492
KSH_E4
1.817430
0.811520
0.001961 0.809830 0.077621 0.000691
0.004122 0.928769 0.077729 0.000775
0.11
0 .0 0
0.74
0.54
KSH_E7
2.457805
0.036810
0.201516
0.002152 0.833055 0.088459 0.000750
1260
11
1183
12
1386
16
85
1228
22
137.12 0 .0 0
KSH_E8
1.822170
0.029883
0.167858
0.001962 0.799382 0.078732 0.000784
1053
11
1000
11
1170
19
86
1024
21
59.76 0 .0 0
KSH_E9
1.661679
0.029743
0.166042
0.002181 0.796386 0.072583 0.000790
994
11
990
12
1007
23
98
993
22
0.25
KSH_E10
3.117377
0.047256
0.250183 0.002669 0.818443
0.090372 0.000803
1437
12
1439
14
1433
17
100
1437
23
0.09
0.76
KSH_E12
1.660752
0.028498
0.163576
0.001996 0.782887 0.073636 0.000791
994
11
977
11
986
18
99
985
21
5.54
0 .0 2
0.62
KSH_F2
2.011485
0.020920
0.188632
0.001431 0.752271 0.077733 0.000533
1119
7
1114
8
1131
19
98
1118
14
1.07
0 .3 0
KSH_F3
1.848323
0.021847
0.177631
0.001594 0.766059 0.075852 0.000576
1063
8
1054
9
1085
21
97
1060
15
2.38
0 .12
KSH_F4
2.148017
0.022269
0.196435
0.001533
0.781810
0.079712
0.000516
1164
7
1156
8
1181
18
98
1163
14
2.53
0 .11
KSH_F5
2.040725
0.017253
0.189324
0.001182
0.817719
0.078575 0.000386
1129
6
1118
6
1156
17
97
1127
11
9.52
0 .0 0
KSH_F6
2.109780
0.030766
0.194252
0.001897
0.620611 0.079173 0.000907
1152
10
1144
10
1177
20
97
1148
18
0.75
0 .3 9
KSH_F7
1.875016
0.023142
0.183929
0.001903 0.858416
0.000471
1072
8
1088
10
1043
18
104
1069
16
8.99
0 .0 0
KSH_F9
1.705984
0.019868
0.167162
0.001357 0.689402 0.074395 0.000628
1011
7
996
7
1054
20
95
1004
14
5.90
0 .0 2
KSH_F10
3.148141
0.030952 0.247846
0.001866 0.808979 0.092593 0.000537
1445
8
1427
10
1478
17
97
1445
15
9.21
0 .0 0
0.074312
KSH_F11
3.845517
0.067106
0.268640 0.002874 0.524452 0.104349
0.001559
1602
14
1534
15
1695
30
91
1568
25
23.64 0 .0 0
KSH_F12
1.881755
0.018655
0.182141
0.001375 0.801923
0.075311 0.000447
1075
7
1079
7
1069
18
101
1075
13
0.78
0 .3 8
KSH_G1
1.846828
0.017115
0.181107
0.001288 0.825239 0.074164 0.000390
1062
6
1073
7
1037
17
103
1063
12
7.24
0 .0 1
KSH_G2
1.013146
0.014115
0.116286
0.001162
710
7
709
7
708
27
100
710
13
0.06
0.81
KSH_G3
3.215286
0.060864 0.250006 0.003838 0.775217
1461
15
1439
20
1479
18
97
1462
29
3.20
0.676878 0.063364 0.000651
0.093534 0.001120
0 .0 7
KSH_G4
2.860181
0.033175
0.225289
0.002140 0.840178
0.092332 0.000581
1371
9
1310
11
1508
16
87
1382
17
KSH_G5
2.074549
0.078932
0.196713
0.007299 0.972594 0.076699 0.000679
1140
26
1158
39
1115
18
104
1117
33
1.30
0 .2 5
KSH_G7
2.538920
0.027989
0.219531
0.001851 0.779692
0.000581
1283
8
1279
10
1293
19
99
1283
16
0.40
0.53
KSH_G8
1.705256
0.019911
0.171920
0.001649 0.842401 0.072138 0.000454
1011
7
1023
9
989
17
103
1010
15
6.18
0 .0 1
KSH_G9
2.598131
0.028026 0.224383
0.084111
0.001886 0.802492 0.084212 0.000542
1300
8
1305
10
1289
16
101
1300
16
101.89 0 .0 0
0.68
0 .4 1
KSH_G10
2.528767
0.026878
0.084722 0.000520
1280
8
1266
10
1308
16
97
1281
15
6.31
0 .0 1
KSH_G11
2.229598
0.023893 0.206362
0.001671 0.773854 0.078577 0.000534
1190
7
1209
9
1157
19
105
1193
15
11.15
0 .0 0
KSH_G12
2.071985
0.021949
0.001526 0.779228 0.079290 0.000527
1140
7
1122
8
1172
19
96
1136
14
11.72
0 .0 0
0.217077
0.190049
0.001818
0.816990
206
Pb/238 U
1487
29
U
1101
35
Pb/238 U
1128
26
Pb/238 U
1102
23
206
Pb/238 U
concordia
1244
1132
26
20
206
Pb/238 U
concordia
1188
1160
30
22
206
Pb/238 U
1010
45
206
Pb/238 U
1183
23
Pb/238 U
concordia
concordia
1000
993
1437
22
22
23
206
238
Pb/
206
206
206
206
Pb/238 U
977
22
206
Pb/238 U
1114
16
206
Pb/238 U
1054
17
206
Pb/
U
1156
17
206
Pb/238 U
1118
13
206
Pb/238 U
1144
20
206
Pb/238 U
1088
21
206
Pb/238 U
996
15
206
Pb/238 U
1427
19
207
238
206
Pb/
Pb
1695
60
Pb/238 U
1079
15
Pb/238 U
concordia
1073
710
14
13
206
Pb/238 U
1439
40
206
Pb/238 U
1310
22
Pb/238 U
concordia
1158
1283
78
16
206
Pb/238 U
1023
18
206
Pb/238 U
1305
20
206
206
206
206
238
Pb/
U
1266
19
206
Pb/238 U
1209
18
206
Pb/238 U
1122
17
Sample KSH-11-16 continued:
KSH_H1
3.575369
0.062020 0.282494
0.003810 0.832379
0.091715 0.000886
1544
14
1604
19
1467
17
109
1529
27
30.16 0 .0 0
KSH_H2
1.730945
0.026983
0.073837 0.000755
1020
10
1011
10
1041
21
97
1016
19
1.53
0 .2 2
KSH_H3
3.184732
0.064266 0.250724 0.004287 0.886524 0.092046 0.000862
1453
15
1442
22
1463
16
99
1459
29
1.05
0 .3 0
KSH_H4
0.675136
0.012078
0.000951 0.624225 0.057352 0.000802
524
7
528
6
528
25
100
527
11
0.45
0.50
KSH_H5
3.415658
0.049993 0.263075
0.002719 0.803618
0.094085 0.000830
1508
11
1506
14
1510
17
100
1508
23
0.09
0.77
KSH_H6
2.177433
0.033437
0.002125 0.788392 0.080929 0.000771
1174
11
1148
11
1226
19
94
1165
21
12.49 0 .0 0
0.169877
0.085305
0.194971
0.001827 0.758013
KSH_H8
1.812689
0.057050
0.173509 0.004970 0.914962
0.075706 0.000962
1050
20
1031
27
1093
21
94
1062
38
2.47
0 .12
KSH_H9
2.144936
0.033281 0.200983 0.002243 0.796170
0.077336 0.000732
1163
11
1181
12
1130
19
104
1167
21
5.42
0 .0 2
KSH_H10
2.637785
0.049826 0.223626 0.003253
0.085476 0.000968
1311
14
1301
17
1324
22
98
1311
28
1.00
0 .3 2
KSH_H11
2.459053
0.038417
0.209489 0.002395 0.808765 0.085062 0.000788
1260
11
1226
13
1317
18
93
1253
22
20.22 0 .0 0
KSH_H12
1.830934
0.030754
0.172877
1057
11
1028
12
1112
18
92
1047
22
15.60 0 .0 0
0.801119
0.002167 0.802673 0.076747 0.000772
KSH_I1
2.552478
0.049275
0.211674
0.003806 0.929634 0.087455 0.000622
1287
14
1238
20
1371
14
90
1331
22
30.93 0 .0 0
KSH_I2
1.520079
0.027928
0.152010
0.002593 0.927964 0.072525 0.000497
939
11
912
14
1001
14
91
958
20
20.22 0 .0 0
KSH_I3
2.800640
0.050451 0.226433 0.003900 0.962879 0.089704 0.000436
1356
13
1316
20
1419
9
93
1404
16
22.25 0 .0 0
KSH_I4
1.838571
0.038698
0.174527 0.003405 0.920651 0.076403 0.000628
1059
14
1037
19
1106
16
94
1076
25
7.73
0 .0 1
KSH_I6
2.143345
0.039188
0.194585 0.003390 0.958153
0.079887 0.000418
1163
13
1146
18
1194
10
96
1183
18
5.42
0 .0 2
KSH_I7
3.768172
0.067713
0.269106 0.004627 0.963798
0.101555 0.000487
1586
14
1536
23
1653
9
93
1640
16
22.55 0 .0 0
KSH_I10
1.758117
0.032778
0.170554 0.003038 0.960630 0.074762 0.000387
1030
12
1015
17
1062
10
96
1050
18
5.90
0 .0 2
KSH_I12
2.995674
0.123502
0.236169 0.009508 0.969109
1407
31
1367
49
1467
19
93
1454
34
3.60
0 .0 6
KSH_J1
2.178967
0.052211
0.193130
0.001449
1174
17
1138
11
1235
34
92
1134
22
9.48
0 .0 0
KSH_J3
2.462484
0.058076 0.207594 0.002085 0.738699 0.085763 0.001503
1261
17
1216
11
1333
34
91
1209
22
14.35 0 .0 0
KSH_J6
2.282739
0.055305 0.203227 0.002324 0.738497
0.001426
1207
17
1193
12
1227
34
97
1192
25
1.52
0 .2 2
KSH_J7
2.440576
0.098533
0.007147 0.900533 0.084769 0.001498
1255
29
1219
38
1310
34
93
1273
54
4.21
0 .0 4
0.208160
0.091995 0.000936
0.002048 0.730022 0.081573
0.081212
KSH_J8
2.720117
0.067378 0.224237 0.002667 0.722139
0.087705 0.001592
1334
18
1304
14
1376
35
95
1305
28
5.30
KSH_J9
1.833860
0.043678
0.170446
0.001763 0.731844
0.077790 0.001378
1058
16
1015
10
1142
35
89
1007
19
15.03 0 .0 0
KSH_J11
2.014593
0.050466
0.186497 0.002470 0.752428
0.078101 0.001361
1120
17
1102
13
1149
34
96
1103
27
2.56
0 .11
KSH_J12
2.977239
0.076120
0.236067
0.091184
0.001676
1402
19
1366
16
1450
35
94
1372
32
6.73
0 .0 1
KSH_K2
3.075266
0.076145
0.243842 0.004265 0.806460 0.090944 0.001350
1427
19
1407
22
1445
28
97
1424
38
2.31
0 .13
KSH_K3
2.087691 0.094748
0.189121 0.007798 0.922879 0.079603 0.001392
1145
31
1117
42
1187
34
94
1167
54
2.42
0 .12
0.003128 0.725300
0 .0 2
KSH_K4
3.097504
0.075170
0.246090
0.004166 0.805518
0.090765 0.001327
1432
18
1418
22
1442
28
98
1430
37
1.16
0 .2 8
KSH_K6
2.054268
0.053407
0.187112
0.003444 0.786712
0.079169
0.001281
1134
18
1106
19
1176
32
94
1122
35
5.49
0 .0 2
KSH_K8
1.826078
0.045830
0.177266
0.003127 0.795961 0.074284 0.001142
1055
16
1052
17
1049
31
100
1054
32
0.07
0.79
KSH_K9
2.013159
0.048449
0.185463
0.003104 0.806944 0.078275 0.001132
1120
16
1097
17
1154
28
95
1110
32
5.03
0 .0 2
KSH_K10
1.750417
0.042610
0.176271 0.003022
KSH_K11
3.407398
0.111679
0.265462 0.007359 0.891293
0.812126
0.001034
1027
16
1047
17
975
29
107
1034
31
3.76
0 .0 5
0.092560 0.001382
1506
25
1518
37
1479
28
103
1500
47
0.39
0.53
0.071608
206
206
Pb/238 U
238
Pb/
1604
38
U
1011
20
Pb/238 U
concordia
concordia
1442
527
1508
44
11
23
206
Pb/238 U
1148
23
206
Pb/238 U
1031
54
206
Pb/238 U
1181
24
206
Pb/238 U
1301
34
206
Pb/238 U
1226
26
206
Pb/238 U
1028
24
206
206
Pb/
U
1238
40
206
Pb/238 U
912
29
206
Pb/238 U
1316
41
206
Pb/238 U
1037
37
206
Pb/238 U
1146
37
Pb/206 Pb
1653
18
207
238
206
238
Pb/
U
1015
33
206
Pb/238 U
1367
99
206
Pb/238 U
1138
22
206
Pb/238 U
1216
22
206
Pb/238 U
1193
25
206
Pb/238 U
1219
76
206
Pb/
U
1304
28
206
Pb/238 U
1015
19
206
Pb/238 U
1102
27
206
Pb/238 U
1366
33
206
Pb/238 U
1407
44
206
Pb/238 U
1117
84
206
238
238
Pb/
U
1418
43
Pb/238 U
concordia
1106
1054
37
32
206
Pb/238 U
1097
34
Pb/238 U
concordia
1047
1500
33
47
206
206
Sample KSH-11-16 continued:
KSH_L1
2.331058
0.058978
0.208317 0.003578 0.744834 0.080690 0.001369
1222
18
1220
19
1214
33
100
1221
34
0.02
0.88
KSH_L2
3.005075
0.089835 0.238902 0.005755 0.852650 0.090704 0.001422
1409
23
1381
30
1440
30
96
1416
45
3.11
0 .0 8
KSH_L3
1.543391
0.036187
0.152705 0.002205 0.704296 0.072881 0.001222
948
14
916
12
1011
34
91
923
24
9.01 0 .0 0
KSH_L6
1.694892
0.045247
0.166937
0.073211 0.001300
1007
17
995
17
1020
36
98
1001
32
0.88
KSH_L7
3.224079
0.083087
0.241232 0.004639 0.824501 0.096374 0.001419
1463
20
1393
24
1555
27
90
1460
40
26.53 0 .0 0
KSH_L11
1.719564
0.041947
0.162487 0.002782 0.791937
1016
16
971
15
1103
30
88
989
30
20.11 0 .0 0
0.003115
0.748101
0.076311 0.001149
0 .3 5
KSH_L12
3.055514
0.067455
0.242193 0.003348 0.755072 0.090973 0.001342
1422
17
1398
17
1446
28
97
1411
32
3.83
0 .0 5
KSH_M 1
2.045482
0.050302
0.190468 0.003035 0.758233 0.077676 0.001263
1131
17
1124
16
1139
32
99
1127
31
0.35
0.55
KSH_M 3
2.626981 0.073290 0.222550
1308
20
1295
24
1324
31
98
1307
41
0.84
0 .3 6
0.004614 0.817029
0.085378 0.001385
0.768191 0.076941 0.001214
1090
16
1072
16
1120
31
96
1079
30
2.67
0.253892
0.010062 0.926838 0.092534 0.001523
1469
33
1459
52
1478
31
99
1477
54
0.18
0.67
0.080702
0.001495 0.645904 0.058590 0.001310
KSH_M 4
1.924170
0.046633
0.180883 0.002844
KSH_M 7
3.248154
0.142191
KSH_M 8
0.653724
0.019147
KSH_M 9
2.656160
0.064334 0.225784 0.003550 0.769214
KSH_M 10
1.907189
0.064205
KSH_M 11
3.129207
KSH_M 12
2.350558
0.083399 0.209474 0.006290 0.882378
KSH_N2
2.310768
0.099410
0 .10
511
12
500
9
552
48
91
502
18
1.32
0 .2 5
0.085090 0.001340
1316
18
1312
19
1318
30
100
1315
34
0.10
0.75
0.175739 0.004883 0.866074 0.078495 0.001325
1084
22
1044
27
1159
33
90
1087
45
8.94
0 .0 0
0.085879 0.248936 0.005000 0.809264 0.090920 0.001478
1440
21
1433
26
1445
31
99
1440
42
0.21
0.65
0.001359
1228
25
1226
33
1225
33
100
1228
49
0.01
0.92
0.008468 0.980428 0.083580 0.000714
1216
30
1153
45
1350
16
85
1307
27
12.88 0 .0 0
0.195812
0.081162
KSH_N4
3.124929
0.120211
0.239096
0.009193 0.976443 0.092567 0.000773
1439
29
1382
48
1533
16
90
1508
27
7.77
0 .0 1
KSH_N5
2.984473
0.114209
0.235476
0.009021 0.978580 0.089765 0.000711
1404
29
1363
47
1485
16
92
1455
26
4.17
0 .0 4
KSH_N6
1.641533
0.062958
0.158684 0.006070 0.973778 0.073266 0.000643
986
24
949
34
1084
19
88
1043
28
9.61 0 .0 0
KSH_N7
3.350992
0.127801 0.244779 0.009360 0.980630 0.096959 0.000729
1493
29
1411
48
1625
15
87
1594
23
15.48 0 .0 0
KSH_N10
2.091612
0.079770
1146
26
1115
39
1219
16
91
1192
26
4.46
KSH_B2
12.383233 0.526398 0.390698 0.006308
0.361501 0.229929 0.009115
2634
39
2126
29
3072
61
69
2157
58
114.15 0 .0 0
KSH_C1
1.061889
0.023298
0.112801
0.909075 0.068279 0.000629
735
11
689
12
901
17
76
725
23
80.15 0 .0 0
KSH_C8
0.732131
0.018836
0.082782
0.001911 0.932588 0.064146 0.000599
558
11
513
11
795
20
65
537
22
118.96 0 .0 0
KSH_D2
1.992490
0.040020
0.169336
0.001898 0.595746 0.085344 0.001378
1113
13
1008
10
1310
31
77
1021
21
81.58 0 .0 0
KSH_D4
1.393667
0.110720
0.085597 0.004473 0.590521
886
46
529
27
2722
165
19
478
52
59.33 0 .0 0
KSH_E5
2.204925
0.035216
0.188383 0.002222 0.836454 0.084890 0.000755
1183
11
1113
12
1499
30
74
1158
22
109.23 0 .0 0
KSH_E6
2.379410
0.063833
0.192703
0.004721 0.938335 0.089554 0.000833
1236
19
1136
25
1413
17
80
1338
29
97.38 0 .0 0
KSH_E11
2.104364
0.032837
0.181633
0.002018 0.816225
0.084029 0.000770
1150
11
1076
11
1282
17
84
1109
21
125.10 0 .0 0
KSH_F1
2.792726
0.059818
0.187616
0.002252
0.108508
0.002117
1354
16
1108
12
1766
37
63
1145
24
219.03 0 .0 0
KSH_F8
0.954276
0.016836
0.087473 0.000589 0.156224
0.079526 0.001421
680
9
541
3
1176
38
46
551
7
219.96 0 .0 0
KSH_G6
2.626903
0.050942
0.219113
0.003656 0.840526 0.087192
0.000917
1308
14
1277
19
1678
49
76
1316
28
8.51 0 .0 0
KSH_H7
2.426878
0.059270
0.188653
0.002951 0.573620 0.093220 0.001871
1251
17
1114
16
1984
133
56
1154
30
72.82 0 .0 0
0.188813
0.007214 0.979624 0.078458 0.000605
0.002117
0.432119
0.118094 0.007598
0 .0 3
concordia
1221
34
206
Pb/238 U
1381
60
206
Pb/238 U
916
25
206
Pb/238 U
995
34
Pb/206 Pb
1555
55
971
31
Pb/ U
concordia
1398
1127
35
31
206
207
206
206
Pb/238 U
238
Pb/238 U
1295
49
206
Pb/238 U
concordia
1072
1477
31
54
206
Pb/238 U
concordia
500
1315
18
34
206
Pb/238 U
concordia
concordia
1044
1440
1228
53
42
49
206
1153
91
Pb/238 U
206
Pb/
U
1382
95
206
Pb/238 U
1363
94
206
Pb/238 U
949
67
Pb/206 Pb
1625
30
1115
78
207
206
238
Pb/238 U
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
Sample KSH-11-16 continued:
KSH_I5
1.486263
0.118063
0.091296 0.003870 0.370731
0.118069 0.008844
925
47
563
23
1927
128
29
556
46
46.07 0 .0 0
KSH_I8
2.038302
0.130505
0.163155
0.010407 0.990927 0.090607 0.000780
1128
43
974
57
1438
16
68
1417
22
65.80 0 .0 0
KSH_I9
1.684720
0.033157
0.153829 0.002700 0.879640 0.079429 0.000744
1003
12
922
15
1183
18
78
1017
25
126.09 0 .0 0
KSH_I11
1.818026
0.057982
0.149728 0.004697 0.980755 0.088062 0.000548
1052
21
899
26
1384
12
65
1336
16
# # # # 0 .0 0
KSH_J2
6.067620
0.143230
0.195712
0.002004 0.742138
0.224153 0.003904
1986
20
1152
11
3011
28
38
927
17
# # # # 0 .0 0
KSH_J4
1.443215
0.059216
0.135125
0.004682 0.889613
0.077222 0.001454
907
24
817
27
1127
37
73
878
50
54.82 0 .0 0
KSH_K1
2.042058
0.077555
0.201844 0.006805
0.918531 0.072955 0.001099
1130
26
1185
36
1013
30
117
1090
48
11.62 0 .0 0
KSH_K5
2.080551 0.061977
94.45 0 .0 0
KSH_K7
2.161678
KSH_K12
0.743169
KSH_L8
KSH_N1
KSH_N3
0.161690
0.002866 0.584214
0.092789 0.002244
1142
20
966
16
1484
45
65
981
32
0.054907
0.183091
0.003351 0.812335
0.085138
0.001277
1169
17
1084
18
1319
29
82
1123
35
58.68 0 .0 0
0.019183
0.074298
0.001417
0.828379 0.072130
0.001056
564
11
462
9
990
29
47
427
16
# # # # 0 .0 0
2.490228
0.056202 0.200086 0.002923 0.766481 0.089745 0.001323
1269
16
1176
16
1420
28
83
1201
31
69.84 0 .0 0
0.989329
0.038795
0.109458 0.004227 0.956883 0.064015 0.000733
698
20
670
25
798
25
84
733
33
12.60 0 .0 0
1.531616
0.066702
0.144647 0.006293 0.972016
943
26
871
35
1129
22
77
1060
31
36.62 0 .0 0
KSH_N8
2.916796
0.114229
0.205133 0.007970 0.966395 0.100706
0.001019
1386
29
1203
42
1812
16
66
1619
27
114.26 0 .0 0
KSH_N9
10.545503 0.424612
0.414113
0.016727 0.979629 0.180358
0.001468
2484
37
2234
76
2689
14
83
2678
21
37.21 0 .0 0
KSH_N11
1.534221
0.146662
0.006141 0.955946 0.074090 0.000929
944
26
882
34
1123
19
79
1023
37
24.46 0 .0 0
0.065164
0.074994 0.000772
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
Sample KSH-11-18:
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
±1σ
Rho
Pb
206
Pb
207
±1σ
Pb ±1σ
235
U (Ma)
206
Pb ±1σ
238
U (Ma)
207
206
Pb ±1σ U/Pb Concordia M SWD P ro b. 232 Th 238 U
Pb (Ma) Pb/Pb age ±2σ (Ma)(of concordance)
(ppm) (ppm) Th/U
(a)
(b)
(c)
Age used Age ±2σ (Ma)
(d)
(e)
Sample KSH-11-18 (38.50487°N, 77.43166°W)
au07b05
2.842638
0.135684
0.230046 0.009522 0.433580 0.088369 0.000651
1367
36
1335
50
1391
14
96
1359
69
0.46
0.50
au07b06
2.563889
0.130777
0.219878
0.088063 0.001779
1290
37
1281
35
1384
39
93
1285
58
0.05
0.83
au07b07
1.770295
0.097953
0.174621 0.005976 0.309265 0.072754 0.001880
1035
36
1038
33
1007
52
103
1036
55
0.01
0.94
au07b08
3.480585
0.112880
0.266054 0.004933 0.285871 0.094418
0.001182
1523
26
1521
25
1516
24
100
1522
41
0.00
0.95
au07b09
2.840320
0.158512
0.230598 0.006992 0.271662
0.093330 0.001817
1366
42
1338
37
1495
37
89
1349
62
0.36
0.55
au07b10
3.247065
0.178709
0.249303 0.009790 0.356740 0.092462 0.001144
1468
43
1435
51
1477
23
97
1456
76
0.40
0.53
au07b11
2.680151
0.152733
0.227355 0.006996 0.269994 0.089729 0.001738
1323
42
1321
37
1420
37
93
1322
62
0.00
0.96
au07b12
3.243632
0.094173
0.252245
0.005514 0.376441 0.092093 0.000937
1468
23
1450
28
1469
19
99
1462
41
0.37
0.54
au07b15
2.592269
0.077107
0.222217 0.004053 0.306581 0.085739 0.001123
1298
22
1294
21
1332
25
97
1296
35
0.04
0.85
au07b16
1.828935
0.049238
0.175969 0.003862 0.407612
0.075167 0.000479
1056
18
1045
21
1073
13
97
1052
32
0.26
0.61
au07b17
2.036865
0.123554
0.195816
0.006066 0.255346 0.077299 0.001293
1128
41
1153
33
1129
33
102
1144
57
0.30
0.58
au07b18
3.159225
0.260163
0.248866
0.013269 0.323737 0.093305 0.001830
1447
64
1433
68
1494
37
96
1441
107
0.04
0.85
au07b19
2.031142
0.129240
0.183334
0.005159
0.080907 0.001549
1126
43
1085
28
1219
38
89
1095
52
0.77
0 .3 8
au07b20
3.369210
0.243912
0.261712
0.012773 0.337071 0.087676 0.000993
1497
57
1499
65
1375
22
109
1498
99
0.00
0.98
au07b21
2.717997
0.226875 0.220333
0.017421 0.473616
au07b22
2.414810
0.082982
au07b25
0.006591 0.293819
0.221133
0.088405 0.000836
1333
62
1284
92
1391
18
92
1325
122
0.36
0.55
0.212003 0.004999 0.343095 0.083394 0.001035
1247
25
1239
27
1278
24
97
1244
42
0.07
0.80
4.007471 0.094566
0.288641 0.004416 0.324155
0.001187
1636
19
1635
22
1643
22
99
1635
33
0.00
0.97
au07b26
2.085896
0.168339
0.191287
0.011631 0.376709 0.079922 0.001251
1144
55
1128
63
1195
31
94
1138
98
0.06
0.81
au07b27
0.872644
0.160560
0.098889
0.010466 0.287602 0.069717
0.001430
637
87
608
61
920
42
66
615
113
0.10
0.75
au07b28
1.837405
0.061154
0.176279 0.004657 0.396841 0.075623 0.000899
1059
22
1047
26
1085
24
96
1054
39
0.22
0.64
JL29a08
2.262247
0.105431
0.199825 0.006922 0.371637
0.001340
1201
33
1174
37
1233
32
95
1190
58
0.44
0.51
JL29a09
1.605374
0.118335
0.164847
0.010699 0.440234 0.069305 0.001247
972
46
984
59
908
37
108
976
86
0.04
0.84
JL29a10
1.540473
0.041233
0.156114
0.002977 0.356267 0.072927 0.000480
947
16
935
17
1012
13
92
941
27
0.38
0.54
JL29a11
1.881410
0.129628
0.187626 0.007666 0.296500 0.075461 0.001260
1075
46
1109
42
1081
33
103
1093
70
0.43
0.51
0.458208
2464
33
2432
61
2483
14
98
2461
66
0.34
0.56
JL29a13
10.324531 0.371916
0.013704
0.415139
0.101032
0.081483
0.162638
0.001398
JL29a14
1.496012
0.078076
0.154761 0.006537 0.404691 0.071633 0.000975
929
32
928
36
976
28
95
928
57
0.00
0.98
JL29a17
3.056057
0.123613
0.245840
0.007151 0.359573 0.091239
0.001141
1422
31
1417
37
1452
24
98
1420
55
0.02
0.90
JL29a18
2.445521
0.104150
0.216719
0.006625 0.358896
0.001707
1256
31
1265
35
1241
41
102
1259
54
0.05
0.82
JL29a20
1.843466
0.100062
0.176321 0.007348 0.383876 0.076276 0.000977
1061
36
1047
40
1102
26
95
1055
63
0.11
0.74
JL29a21
2.435453
0.136334
0.208831 0.008614 0.368436 0.086037 0.001676
1253
40
1223
46
1339
38
91
1241
71
0.39
0.53
0.081815
248
33
39
79
29
85
40
108
94
65
69
65
699
61
42
134
64
169
59
261
141
838
134
59
0.355
0.538
0.931
0.589
0.450
0.502
0.676
0.412
0.669
0.078
0.517
1.107
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
1359
1285
1036
1522
1349
1456
1322
1462
1296
1052
1144
1441
69
58
55
41
62
76
62
41
35
32
57
107
78
44
154
104
113
55
1142
310
35
58
216
63
150
60
105
19
109
42
242
264
351
174
176
132
697
342
130
134
1513
132
208
217
172
74
381
90
0.322
0.167
0.438
0.597
0.640
0.420
1.639
0.907
0.269
0.429
0.143
0.477
0.719
0.275
0.613
0.252
0.286
0.467
206
1085
1498
1325
1244
1635
1138
615
1054
1190
976
941
1093
2461
928
1420
1259
1055
1241
56
99
122
42
33
98
113
39
58
86
27
70
66
57
55
54
63
71
Pb/238 U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
Sample KSH-11-18 continued:
JL29a22
2.504555
0.256994
0.212224
1273
74
1241
58
1380
31
90
1251
102
0.16
0.69
JL29a23
2.141228
0.121913
0.194069 0.008586 0.388544 0.082127
0.001743
1162
39
1143
46
1249
42
92
1155
71
0.16
0.69
JL29a27
0.969919
0.104675
0.116725
0.008434 0.334739 0.067515
0.001795
688
54
712
49
854
55
83
702
83
0.15
0.69
JL29a28
1.404213
0.140141
0.150658
0.012164
0.068283 0.001973
891
59
905
68
877
60
103
896
105
0.04
0.84
JL29a29
1.659572
0.169305
0.159169
0.009838 0.302922 0.077503 0.001145
993
65
952
55
1134
29
84
967
96
0.33
0.57
JL29a30
1.755507
0.110211
0.172477 0.006542 0.302079 0.078037 0.001287
1029
41
1026
36
1148
33
89
1027
61
0.01
0.94
JL29a32
1.726225
0.077450
0.167230 0.005380 0.358496 0.078057 0.001234
1018
29
997
30
1148
31
87
1008
48
0.42
0.52
JL29a33
2.218810
0.325658
0.184861
0.031459 0.579733 0.084682 0.000906
1187
103
1093
171
1308
21
84
1184
206
0.46
0.50
JL29a34
1.785156
0.099245
0.173517
0.004656 0.241337
0.080066 0.001398
1040
36
1031
26
1199
34
86
1034
46
0.05
0.83
JL29a38
1.814323
0.131313
0.171600
0.007791 0.313674
0.086156
0.001489
1051
47
1021
43
1342
33
76
1033
73
0.31
0.58
JL29a39
0.754411
0.022148
0.092142
0.002118
0.391543
0.059266 0.000550
571
13
568
13
577
20
98
569
21
0.03
0.85
JL29a40
2.666080
0.118373
0.228735 0.006693 0.329519
0.088360 0.001712
1319
33
1328
35
1390
37
96
1323
55
0.05
0.82
JL29a41
1.902819
0.153532
0.182283
0.009314 0.316627
0.080378 0.001259
1082
54
1079
51
1206
31
89
1081
85
0.00
0.97
JL29a42
3.791497
0.198803
0.273835
0.013080 0.455478
0.101714
0.001463
1591
42
1560
66
1656
27
94
1587
83
0.26
0.61
JL29a43
2.815588
0.130076
0.234480
0.010043 0.463549 0.088217
0.001047
1360
35
1358
52
1387
23
98
1359
68
0.00
0.97
JL29a44
1.892758
0.125009
0.180160
0.008828 0.370975 0.080529 0.002278
1079
44
1068
48
1210
56
88
1074
76
0.04
0.84
JL29a47
2.149544
0.079227
0.197036
0.005314 0.365882 0.078732 0.001708
1165
26
1159
29
1165
43
99
1163
45
0.03
0.86
JL29a48
2.074494
0.152040
0.191867
0.010415
1140
50
1131
56
1208
19
94
1137
88
0.02
0.88
JL29a49
1.971257
0.043145
0.185486 0.003265 0.402103
1106
15
1097
18
1137
14
96
1103
27
0.24
0.62
JL29a50
3.193478
0.126682
0.251213
0.007295 0.366029 0.097412
0.001122
1456
31
1445
38
1575
22
92
1452
55
0.08
0.78
JL29a51
2.401215
0.156991
0.213074
0.010338 0.371050
0.083748 0.000686
1243
47
1245
55
1287
16
97
1244
83
0.00
0.97
JL29a52
2.298071 0.059659 0.204722
0.004130 0.388583 0.081094 0.000773
1212
18
1201
22
1224
19
98
1208
33
0.24
0.62
JL29a53
2.536067
0.126660
0.217267 0.006333
0.088232 0.000745
1282
36
1267
34
1388
16
91
1274
56
0.13
0.72
JL29a57
2.174263
0.121764
0.194178
0.006635 0.305054 0.083987 0.001097
1173
39
1144
36
1292
25
89
1156
61
0.42
0.51
JL29a58
1.638937
0.078356
0.163357
0.004471 0.286207 0.078503 0.001527
985
30
975
25
1160
39
84
979
43
0.09
0.77
JL29a59
2.815206
0.131004
0.229781 0.006886 0.321980
0.093023 0.001088
1360
35
1333
36
1488
22
90
1347
58
0.40
0.53
JL29a60
1.910148
0.132266
0.181846
0.009114
0.080830 0.001606
1085
46
1077
50
1217
39
88
1081
79
0.02
0.89
JL29a61
2.094218
0.111267
0.191236
0.006024 0.296438 0.082376 0.001617
1147
37
1128
33
1254
38
90
1136
56
0.21
0.65
JL29a62
1.839495
0.102152
0.178690
0.006123 0.308516
0.077286 0.001125
1060
37
1060
33
1129
29
94
1060
56
0.00
1.00
JL29a63
2.930714
0.110522
0.230726 0.007297 0.419320
0.089284 0.001029
1390
29
1338
38
1410
22
95
1376
54
1.96
0 .16
JL29a64
3.033693
0.176785
0.242817 0.008439 0.298201 0.092934 0.001224
1416
45
1401
44
1487
25
94
1408
71
0.08
JL29a67
2.695292
0.112799
0.230328 0.005928 0.307483 0.083825 0.001382
1327
31
1336
31
1288
32
104
1332
50
0.06
0.80
JL29a68
1.555259
0.071190
0.153257
953
28
919
25
1080
40
85
932
43
1.14
0 .2 9
JL29a69
2.402943
0.098482 0.206877
JL29a70
2.028794
0.119132
0.010850 0.249127
0.404519
0.087876 0.001437
0.370307 0.080455 0.000791
0.291818
0.361888
0.004401 0.313706
0.077608 0.000541
0.075439 0.001485
0.005241 0.309067 0.088876 0.001287
0.192229 0.007009 0.310467
0.076915
0.001653
0.78
1243
29
1212
28
1401
28
86
1226
47
0.85
0 .3 6
1125
40
1133
38
1119
43
101
1130
63
0.03
0.86
93
32
25
10
64
139
7
49
36
29
416
14
64
96
168
18
89
487
545
81
354
172
190
100
46
425
35
54
202
207
58
46
48
494
140
287
924
408
105
992
39
228
127
393
21
129
862
833
244
639
385
559
175
100
413
86
119
156
0.449
0.559
0.545
0.204
0.129
0.996
0.026
0.053
0.088
0.275
0.419
0.349
0.281
0.759
0.427
0.878
0.692
0.565
0.654
0.330
0.553
0.446
0.339
0.569
0.457
1.029
0.409
0.449
1.293
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
1251
1155
702
896
967
1027
1008
1184
1034
1033
569
1323
1081
1587
1359
1074
1163
1137
1103
1452
1244
1208
1274
1156
979
1347
1081
1136
1060
102
71
83
105
96
61
48
206
46
73
21
55
85
83
68
76
45
88
27
55
83
33
56
61
43
58
79
56
56
232
109
44
256
232
80
0.905
0.471
0.558
206
1338
1408
1332
76
71
50
45
101
0.444
206
Pb/238 U
919
49
0.203
0.449
206
Pb/238 U
concordia
1212
1130
56
63
25
35
125
77
Pb/238 U
concordia
concordia
Sample KSH-11-18 continued:
JL29a78
1.990003
0.071101
0.186003 0.004907 0.369193
0.077587 0.000719
1112
24
1100
27
1136
18
97
1107
42
0.19
0.66
JL29a79
2.572030
0.223764
0.219497
0.452711 0.094328 0.004464
1293
64
1279
91
1515
89
84
1290
123
0.03
0.87
JL29a80
1.216674
0.174920
0.125729 0.009775 0.270379 0.074950 0.002303
808
80
763
56
1067
62
72
775
103
0.27
0.60
JL29a81
2.422180
0.067528
0.211342
0.004132 0.350625 0.081438 0.000825
1249
20
1236
22
1232
20
100
1243
34
0.30
0.58
JL29a82
2.102196
0.108239
0.199012
0.006277 0.306291 0.082444 0.001553
1150
35
1170
34
1256
37
93
1160
56
0.25
0.61
JL29a83
2.155327
0.135810
0.191828
0.010729 0.443803 0.078371 0.000973
1167
44
1131
58
1156
25
98
1157
83
0.42
0.52
JL29a84
1.909486
0.077706
0.182927 0.004478 0.300758 0.075761 0.000951
1084
27
1083
24
1089
25
99
1084
41
0.00
0.96
54
81
194
5
7
125
25
147
113
JL29a87
1.833377
0.095253
0.169370 0.005799 0.329476 0.077307 0.001464
1057
34
1009
32
1129
38
89
1030
54
1.60
0 .2 1
32
0.001469
1386
32
1331
32
1455
31
91
1357
52
2.07
0.189727 0.009752 0.437319
0.075966 0.000935
1133
40
1120
53
1094
25
102
1130
76
0.07
0.79
JL29a72
2.915547
0.124534
0.229415
JL29a73
2.053448
0.120677
0.006041 0.308230
0.017290
0.091413
0 .15
0.084368 0.001229
1249
29
1196
32
1301
28
92
1226
50
2.41
0.233396 0.005039 0.294331 0.088646 0.001192
1344
27
1352
26
1397
26
97
1349
43
0.06
0.81
0.001169
1182
24
1180
25
1224
28
96
1181
40
0.01
0.94
0.072885 0.001109
1006
30
989
36
1011
31
98
1000
55
0.22
0.64
0.001282
1476
37
1443
52
1496
26
96
1468
71
0.45
0.50
0.001276
1043
35
1023
41
1074
34
95
1036
62
0.24
0.63
0.005191 0.425619
0.074065 0.000806
955
24
933
29
1043
22
89
947
44
0.57
0 .4 5
0.174779 0.007644 0.322612
0.079492 0.001714
1064
45
1038
42
1184
43
88
1050
71
0.25
0.62
JL29a99
12.488144 0.634847 0.485233 0.022097 0.447893
0.183918 0.002007
2642
48
2550
96
2689
18
95
2638
96
1.16
0 .2 8
JL29a100
2.527502
0.232115
0.213758
1249
65
1411
50
88
1264
108
0.16
0.69
JL29a101
3.199651
0.206215
JL29a102
2.455315
0.109670
JL29a103
3.202911
0.249509 0.253074
JL29a104
JL29a88
2.421908
0.096634 0.203843 0.005939 0.365103
JL29a89
2.758736
0.101179
JL29a90
2.204180
0.075058 0.200936 0.004704 0.343749 0.081098
JL29a91
1.692719
0.079645
0.165770 0.006527
0.418419
JL29a92
3.278408
0.156065
0.250844
0.010172
0.425928 0.093414
JL29a93
1.793800
0.095151
0.171976
0.007399 0.405560 0.075195
JL29a97
1.560704
0.061110
0.155739
JL29a98
1.850330
0.125428
0 .12
0.012315
0.313678
0.089326 0.002350
1280
67
0.246529
0.011137
0.350478 0.093830 0.001444
1457
50
1421
58
1505
29
94
1442
88
0.35
0.55
0.211141
0.006297 0.333850 0.084956 0.001586
1259
32
1235
34
1315
36
94
1247
54
0.40
0.53
0.013614
0.345268 0.093737 0.001563
1458
60
1454
70
1503
32
97
1456
106
0.00
0.96
2.482981 0.082306
0.216386 0.005646 0.393585 0.082031 0.001032
1267
24
1263
30
1246
25
101
1266
44
0.02
0.89
JL29a107
2.062413
0.140681
0.190611 0.006499 0.249915
0.084988 0.002362
1136
47
1125
35
1315
54
86
1128
63
0.05
0.82
JL29a108
3.172454
0.101585
0.251567 0.006635
0.093965 0.001129
1450
25
1447
34
1507
23
96
1450
47
0.01
0.90
JL29a109
1.978733
0.073210
0.188114
0.004236 0.304330 0.078668 0.001175
1108
25
1111
23
1164
30
95
1110
39
0.01
0.92
JL29a110
1.963366
0.080981
0.188130
0.005181 0.333820 0.079012
0.001291
1103
28
1111
28
1172
32
95
1107
46
0.06
0.80
JL29a111
2.834432
0.098971
0.233167 0.006852 0.420795 0.088153
0.001192
1365
26
1351
36
1386
26
97
1361
50
0.16
0.69
JL29a112
2.155288
0.087814
0.200331 0.004246 0.260104
0.001188
1167
28
1177
23
1151
30
102
1173
40
0.11
0.74
JL29a113
1.524499
0.046196
0.153018
0.004345 0.468483 0.070641 0.000675
940
19
918
24
947
20
97
934
35
0.98
0 .3 2
JL29a114
1.565256
0.116484
0.157699
0.007143 0.304309
0.071719
0.001819
957
46
944
40
978
52
97
949
69
0.06
0.81
JL29a117
2.571866
0.111919
0.225440 0.006275 0.319840
0.087016
0.001128
1293
32
1311
33
1361
25
96
1301
52
0.22
0.64
JL29a118
1.685769
0.178872
0.161619
0.007880 0.229764 0.078937 0.001252
1003
68
966
44
1171
31
83
974
81
0.27
0.61
JL29a119
3.298772
0.109157
0.253728 0.006893
1481
26
1458
35
1494
23
98
1475
49
0.46
0.50
Sample KSH-11-18 continued:
0.411821
0.410514
0.078180
0.093296 0.001139
76
519
455
7
52
332
93
246
251
0.719
0.157
0.427
0.689
0.131
0.375
0.268
0.598
0.451
206
Pb/238 U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
1331
1130
1107
1290
775
1243
1160
1157
1084
63
76
42
123
103
34
56
83
41
130
0.245
206
Pb/238 U
1009
64
100
84
137
132
130
198
158
152
168
288
161
252
0.633
0.549
0.814
0.458
0.807
0.787
206
Pb/238 U
concordia
concordia
concordia
concordia
concordia
1196
1349
1181
1000
1468
1036
64
43
40
55
71
62
321
18
510
78
0.629
0.236
206
Pb/238 U
concordia
933
1050
58
71
107
30
88
63
83
62
20
121
118
67
39
184
94
63
150
137
144
156
62
202
190
163
139
188
1.133
0.467
0.584
0.459
0.580
0.399
0.318
0.600
0.623
0.412
0.283
0.983
206
Pb/238 U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
2550
1264
1442
1247
1456
1266
1128
1450
1110
1107
1361
1173
192
108
88
54
106
44
63
47
39
46
50
40
137 1228 0.112
33 140 0.237
249 241 1.034
219 393 0.557
228 235 0.970
206
918
949
1301
974
1475
49
69
52
81
49
Pb/238 U
concordia
concordia
concordia
concordia
JL29a07
1.206503
0.053569
0.110832
804
25
678
34
1263
26
54
784
50
JL29a12
0.912588
0.048839
0.100901 0.004504 0.417055
0.067240 0.000681
658
26
620
26
845
21
73
639
44
JL29a19
1.677409
0.156296
0.115323
0.010263 0.477544
0.101627 0.002438
1000
59
704
59
1654
44
43
801
109
21.83 0 .0 0
JL29a24
1.385234
0.067767
0.116610
0.004176 0.365992 0.086282 0.000616
883
29
711
24
1345
14
53
760
44
30.23 0 .0 0
JL29a37
1.394409
0.117228
0.115131
0.009312 0.481029
0.085538 0.000791
887
50
702
54
1328
18
53
792
93
11.75 0 .0 0
JL29a71
1.527537
0.070090
0.162752 0.004562 0.305475 0.065678 0.001380
942
28
972
25
796
44
12 2
959
43
0.94
0 .3 3
JL29a74
1.702753
0.111185
0.158315
0.008160 0.394684 0.078445 0.000851
1010
42
947
45
1158
22
82
981
73
1.66
0 .2 0
JL29a75
1.981985
0.143724
0.174031 0.008886 0.352063 0.084014 0.002223
1109
49
1034
49
1293
51
80
1069
82
1.79
0 .18
JL29a94
1.314454
0.176363
0.130792
852
77
792
83
1036
22
76
824
136
0.47
0 .4 9
0.005920
0.601461 0.082739 0.001120
0.014557 0.414748
0.073806 0.000786
20.89 0 .0 0
1.87
0 .17
175 1275 0.137
57 2051 0.028
82 217 0.378
878 1254 0.700
282 673 0.420
36 113 0.318
415 718 0.578
11
43 0.257
207 828 0.251
not used
not used
not used
not used
not used
not used
not used
not used
not used
Sample KSH-11-19:
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
±1σ
Rho
Pb
206
Pb
207
±1σ
Pb ±1σ
235
U (Ma)
206
Pb ±1σ
238
U (Ma)
207
206
Pb ±1σ U/Pb Concordia M SWD P ro b. 232 Th 238 U
Pb (Ma) Pb/Pb age ±2σ (Ma)(of concordance)
(ppm) (ppm) Th/U
Age used Age ±2σ (Ma)
Sample KSH-11-19 (38.53449°N, 77.38839°W)
457
18
472
10
455
42
104
469
19
0.67
0 .4 1
489
29
469
21
621
44
76
475
39
0.43
0.51
0.078288 0.002812
536
106
464
44
1154
71
40
470
85
0.43
0.51
0.002508 0.202997 0.065778 0.001832
463
32
443
15
799
58
55
445
29
0.36
0.55
0.073673 0.075286 0.006878 0.389766 0.060227 0.001425
495
46
468
41
612
51
76
479
73
0.32
0.57
0.038777 0.076599
0.002310 0.240571 0.062828 0.001401
489
24
476
14
702
47
68
478
26
0.28
0.60
0.588285
0.022663 0.076606
0.001735 0.293953 0.056236 0.000932
470
14
476
10
462
37
103
474
19
0.16
0.69
jl30a36
0.622855
0.026648 0.078094
0.001783 0.266794 0.055823 0.001289
492
17
485
11
445
51
109
486
20
0.16
0.69
jl30a43
0.645719
0.110009
0.076962 0.008384 0.319732
0.063150
0.001904
506
68
478
50
713
64
67
486
92
0.15
0.69
jl30a24
0.621610
0.030743
0.077881 0.002199 0.285419
0.057033 0.001322
491
19
483
13
493
51
98
485
24
0.14
0.71
jl30a37
0.617074
0.037651
0.077159 0.002485 0.263901 0.058078 0.001173
488
24
479
15
533
44
90
481
28
0.13
0.72
jl30a39
0.574429
0.036361 0.072693 0.002467 0.268099 0.058558 0.001045
461
23
452
15
551
39
82
454
28
0.12
0.73
jl30a38
0.558566
0.044605 0.070730 0.003299 0.292002 0.057876 0.001426
451
29
441
20
525
54
84
443
37
0.11
0.74
jl30a42
0.609348
0.031520
0.076679 0.002325 0.293146
0.057766 0.001143
483
20
476
14
521
43
91
478
26
0.11
0.74
jl30a48
0.561718
0.026545
0.071873
0.001756 0.258483 0.057835 0.001122
453
17
447
11
524
43
85
448
20
0.09
0.77
jl30a08
0.571868
0.034147
0.072789
0.002619 0.301262
0.055439 0.001354
459
22
453
16
430
54
105
455
29
0.08
0.78
jl30a46
0.577943
0.025966 0.073740 0.002025 0.305670 0.055263 0.000919
463
17
459
12
423
37
108
460
22
0.07
0.80
jl30a13
0.583989
0.045224 0.073958 0.002946 0.257213
jl30a20
0.552614
0.078243
jl30a23
0.591908
0.054843 0.074690 0.002470 0.178479
jl30a12
0.575005
0.036705
jl30a10
0.613906
0.031163
0.077944
0.001815
jl30a47
0.594914
0.041405
0.075929
0.002193 0.207449 0.061527
jl30a27
0.558639
0.045470 0.072067 0.004469 0.380936 0.056655 0.001061
jl30a21
0.582591 0.028841 0.075007
jl30a09
0.678747
jl30a19
0.624922
jl30a18
0.456122
jl30a11
0.568621 0.027453 0.075982
jl30a41
0.619084
jl30a14
0.695237
0.177319
0.074647 0.007257 0.190574
jl30a22
0.577597
0.050146
0.071164
jl30a40
0.628623
jl30a07
0.618586
jl30a17
0.001694 0.230939 0.056065 0.001063
0.046456 0.075506 0.003575
0.315491 0.060483 0.001246
0.060156
0.001905
467
29
460
18
609
68
76
461
33
0.06
0.81
0.069813 0.004408 0.222949 0.067122
0.002319
447
51
435
27
842
72
52
437
51
0.05
0.82
0.068881 0.001936
472
35
464
15
895
58
52
465
29
0.05
0.83
0.073681 0.001936 0.205774 0.059497 0.001412
461
24
458
12
585
52
78
459
22
0.01
0.90
486
20
484
11
602
46
80
484
21
0.01
0.91
474
26
472
13
658
55
72
472
25
0.01
0.93
0.229340 0.059969 0.001279
0.001582
451
30
449
27
478
41
94
449
47
0.00
0.95
0.001884 0.253627 0.060255 0.001092
466
19
466
11
613
39
76
466
21
0.00
0.99
0.051887
0.066961 0.003796 0.370824 0.079479 0.002282
526
31
418
23
1184
57
35
441
44
11.28 0 .0 0
0.058677
0.074136 0.003935 0.282637 0.063326 0.001706
493
37
461
24
719
57
64
468
44
0.71 0 .4 0
0.083132
0.053041 0.003858 0.199544
382
58
333
24
1095
58
30
337
46
0.67
Sample KSH-11-28:
0.076005 0.002208
0 .4 1
146
65
26
112
95
126
162
70
65
71
80
156
45
119
127
37
103
24
19
71
55
160
58
144
147
388
189
114
228
300
306
444
203
183
241
254
388
159
315
264
172
344
90
83
176
190
326
173
361
366
0.377
0.346
0.228
0.492
0.318
0.413
0.365
0.344
0.353
0.294
0.315
0.403
0.285
0.378
0.481
0.217
0.301
0.266
0.226
0.403
0.292
0.491
0.333
0.398
0.401
118
75
60
228
244
215
0.519
0.309
0.281
206
Pb/238 U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
not used
not used
not used
472
475
470
445
479
478
474
486
486
485
481
454
443
478
448
455
460
461
437
465
459
484
472
449
466
20
39
85
29
73
26
19
20
92
24
28
28
37
26
20
29
22
33
51
29
22
21
25
47
21
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
±1σ
Rho
Pb
206
Pb
207
±1σ
Pb ±1σ
235
U (Ma)
206
Pb ±1σ
238
U (Ma)
207
206
Pb ±1σ U/Pb Concordia M SWD P ro b. 232 Th 238 U
Pb (Ma) Pb/Pb age ±2σ (Ma)(of concordance)
(ppm) (ppm) Th/U
(a)
(b)
(c)
Age used Age ±2σ (Ma)
(d)
(e)
0.930
0.577
0.937
0.895
0.770
0.700
0.797
0.269
0.721
0.181
0.728
0.588
0.761
0.282
0.679
0.663
0.593
0.763
0.870
0.641
0.127
0.739
0.584
0.326
0.909
0.770
0.932
0.521
1.105
0.219
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
Sample KSH-11-28 (38.12930°N, 77.85023°W)
374
31
0.90
710
0.79
81
0.54
103
0.57
86
0.83
80
0.64
46
0.72
88
0.76
25
0.87
75
1.00
42
0.95
78
0.85
57
0.98
44
0.95
132
0.95
29
0.76
113
0.84
157
0.76
69
0.98
68
0.88
80
0.85
43
0.77
55
0.91 163
0.76
79
0.84
150
0.60
97
0.78 2122
0.80
65
450
24
440
21
517
41
85
444
36
0.17
0.68
444
159
486
73
726
85
67
480
139
0.07
0.80
0.067228 0.001698
619
121
603
64
845
53
71
606
123
0.02
0.075181 0.002724
458
49
444
22
1073
73
41
446
42
0.07
0.001392
463
24
478
14
498
54
96
475
26
0.38
0.234611 0.057659 0.001481
467
37
488
22
517
56
94
484
41
0.32
0.061350 0.002287
454
54
466
30
652
80
71
464
57
0.05
0.005167 0.287072 0.056800 0.001657
453
43
474
31
484
64
98
468
56
0.22
0.061861 0.001793
477
30
465
17
669
62
70
467
33
0.13
0.077010
0.001214
1025
33
1014
30
1121
31
90
1019
50
0.10
0.050262
0.077821 0.003100 0.244697 0.064370 0.001788
488
32
483
19
754
59
64
484
35
0.03
0.599714
0.149025
0.076834 0.006508 0.170420
0.065172 0.002559
477
95
477
39
780
83
61
477
76
0.00
0.637902
0.070696 0.080333 0.003888 0.218364
0.064861 0.002036
501
44
498
23
770
66
65
499
44
0.00
1.699528
0.060082
0.168423 0.003729
0.076604 0.000936
1008
23
1003
21
1111
24
90
1006
35
0.04
jl30b38
0.624314
0.083542
0.079133 0.005945 0.280730 0.063818
0.002301
493
52
491
36
736
76
67
491
66
0.00
jl30b39
1.080991
0.062247
0.121945
0.005711 0.406639 0.065346 0.001142
744
30
742
33
785
37
94
743
53
0.00
jl30b40
0.622766
0.088895 0.078633
0.006160 0.274417
0.066918 0.003039
492
56
488
37
835
95
58
489
68
0.00
jl30b41
0.506984
0.051461 0.068579
0.004166 0.299209 0.055501 0.001547
416
35
428
25
432
62
99
424
46
0.10
jl30b42
0.611706
0.071494
0.076451 0.006252 0.349860 0.059009 0.001429
485
45
475
37
567
53
84
478
67
0.04
jl30b44
0.612619
0.050605 0.076540 0.002853 0.225604 0.063190
0.001830
485
32
475
17
715
62
67
477
33
0.09
jl30b47
1.701645
0.143144
0.169745 0.009255 0.324058 0.078328 0.000700
1009
54
1011
51
1155
18
87
1010
85
0.00
jl30b48
0.586566
0.050176
0.074590 0.003728 0.292162
0.060241 0.001562
469
32
464
22
612
56
76
465
41
0.02
jl30b49
0.585744
0.168821
0.078916
0.014429 0.317200
0.057628 0.002068
468
108
490
86
516
79
95
482
153
0.04
jl30b50
0.606348
0.069150
0.075356
0.002901 0.168781 0.068737 0.001877
481
44
468
17
891
56
53
469
34
0.08
jl30b51
0.555885
0.047866
0.071529 0.003552 0.288322 0.062132
0.001747
449
31
445
21
679
60
66
446
40
0.01
jl30b52
0.512576
0.074325 0.069965 0.005300 0.261233
0.057028 0.002099
420
50
436
32
493
81
88
432
59
0.09
jl30b53
0.555154
0.040878 0.072954
0.003219 0.299574 0.056532 0.001370
448
27
454
19
473
54
96
452
35
0.04
jl30b54
0.575043
0.051411
0.071183
0.004521 0.355162
0.059666 0.001505
461
33
443
27
591
55
75
449
49
0.27
jl30b58
0.494053
0.060776
0.063150 0.008629 0.555391 0.057036 0.000586
408
41
395
52
493
23
80
404
80
0.08
jl30b59
2.073764
0.107786
0.191456
1140
36
1129
42
1237
21
91
1136
64
0.06
jl30b08
0.557985
0.036176
jl30b09
0.548615
0.242686 0.078223
0.012168
0.175820
0.063544 0.002546
jl30b10
0.839090
0.219394
0.098100
0.010963 0.213704
jl30b11
0.569536
0.075162
0.071336 0.003574 0.189808
jl30b14
0.577833
0.036941 0.077002 0.002340 0.237665 0.057174
jl30b17
0.583354
0.057335
jl30b18
0.563194
0.083727 0.074897 0.004992 0.224170
jl30b19
0.562171
0.066326 0.076286
jl30b21
0.598853
0.047683 0.074859 0.002892 0.242567
jl30b24
1.745155
0.088019
0.170344
jl30b27
0.617451
jl30b28
jl30b32
jl30b33
0.070623 0.003428 0.374357 0.057656 0.001080
0.078641 0.003627
0.005401 0.314310
0.313121
0.007681 0.385933 0.081642 0.000880
Sample KSH-11-28 continued:
402
54
758
91
134
122
101
172
122
140
102
71
102
202
65
199
48
148
181
108
537
109
74
168
179
103
161
186
1921
298
444
480
606
446
475
484
464
468
467
1019
484
477
499
1006
491
743
489
424
478
477
1010
465
482
469
446
432
452
449
404
1136
36
139
123
42
26
41
57
56
33
50
35
76
44
35
66
53
68
46
67
33
85
41
153
34
40
59
35
49
80
64
jl30b61
1.925051
0.140805
0.082295 0.000986
1090
49
1088
28
1253
23
87
1088
53
0.00
0.97
jl30b62
0.614598
0.056464 0.077455 0.003605 0.253328 0.058877 0.001957
486
36
481
22
563
72
85
482
41
0.02
0.88
jl30b63
0.534623
0.018784
0.070263
0.001312
0.265762 0.057957 0.000792
435
12
438
8
528
30
83
437
15
0.05
0.82
jl30b64
0.588889
0.022422 0.075784
0.002115
0.366478 0.057793 0.000951
470
14
471
13
522
36
90
471
22
0.00
0.96
jl30b67
0.551877
0.060310
0.069871 0.004214 0.275965 0.060660 0.001974
446
39
435
25
627
70
69
438
48
0.07
0.79
jl30b68
0.600786
0.077070 0.075560 0.004996 0.257704 0.062613 0.002432
478
49
470
30
695
83
68
471
56
0.03
0.87
jl30b69
0.524616
0.076839 0.068248 0.004633 0.231745
0.065488 0.002626
428
51
426
28
790
84
54
426
53
0.00
0.96
jl31b07
0.533243
0.049451 0.069746 0.004222 0.326377 0.053365 0.001890
434
33
435
25
344
80
126
434
46
0.00
0.98
jl31b08
0.564764
0.079915
0.074917 0.005357 0.252664 0.060068 0.001997
455
52
466
32
606
72
77
463
60
0.04
0.84
jl31b09
0.574231 0.027726
0.072215
0.056911 0.001134
461
18
449
10
488
44
92
451
19
0.38
0.54
jl31b10
0.899527
0.051537
0.102943 0.004272
0.060844 0.001271
651
28
632
25
634
45
100
640
43
0.44
0.51
jl31b11
0.602277
0.047921
0.074198
0.003081 0.260923 0.058427 0.001904
479
30
461
18
546
71
85
465
35
0.30
0.58
jl31b13
0.600626
0.022784
0.074441 0.001504 0.266266 0.058620 0.000929
478
14
463
9
553
35
84
466
17
0.98
0 .3 2
jl31b18
0.492026
0.127833
0.074563 0.005600 0.144547
0.060548 0.002164
406
87
464
34
623
77
74
458
65
0.44
0.51
jl31b22
0.615869
0.062360 0.078242 0.003303 0.208436 0.064507 0.001669
487
39
486
20
758
55
64
486
38
0.00
0.97
jl31b23
0.538558
0.048246 0.073680 0.002889 0.218832
0.001881
437
32
458
17
572
69
80
455
33
0.41
0.52
jl31b24
0.588936
0.039050 0.077309 0.002536 0.247399 0.057873 0.001489
470
25
480
15
525
56
91
478
28
0.15
0.70
jl31b27
0.720695
0.109883
0.081496
0.010334 0.415826
0.062791 0.001221
551
65
505
62
701
41
72
525
107
0.45
0.50
jl31b28
0.621742
0.086913
0.074310 0.003602 0.173357
0.069281 0.003435
491
54
462
22
907
102
51
464
42
0.27
0.60
jl31b29
0.670833
0.216640
0.081153
0.174391 0.065653 0.002052
521
132
503
55
795
66
63
505
106
0.02
0.89
jl31b32
0.568542
0.040307 0.073457 0.002599 0.249494 0.066868 0.002012
457
26
457
16
834
63
55
457
29
0.00
1.00
jl31b34
0.534141
0.099346
435
66
408
46
732
131
56
414
85
0.16
0.69
jl31b37
0.540423
0.055928 0.069559 0.004268 0.296470 0.062198
0.002124
439
37
433
26
681
73
64
435
47
0.02
0.89
jl31b38
0.537004
0.051643
0.069998 0.004666 0.346551 0.056431 0.001639
436
34
436
28
469
64
93
436
50
0.00
0.99
jl31b39
0.584322
0.039528 0.075325 0.002650 0.259998 0.058921 0.001136
467
25
468
16
564
42
83
468
30
0.00
0.97
jl31b40
0.556853
0.174851 0.072825 0.004257 0.093080 0.080495 0.004664
449
114
453
26
1209
114
37
453
51
0.00
0.97
jl31b41
0.560222
0.020349
452
13
449
8
549
32
82
450
15
0.03
0.87
jl31b42
0.600501 0.048417
0.001719
478
31
475
15
652
60
73
476
29
0.01
0.94
jl31b43
0.460496
0.059775 0.070350 0.003930
0.215195
0.056878 0.001679
385
42
438
24
487
65
90
427
44
1.60
0 .2 1
jl31b44
0.553116
0.077840 0.070872
0.004813 0.241258
0.066290 0.002127
447
51
441
29
816
67
54
442
55
0.01
0.91
jl31b47
0.588204
0.050942 0.072289
0.003114
0.248727 0.066549 0.001927
jl31b50
0.538675
0.069447 0.068433
0.004313 0.244456 0.063173
jl31b51
0.538162
0.022831 0.068626
jl31b53
0.671723
0.168740
0.075775
jl31b54
0.578098
0.050507
0.071572 0.002524 0.201793
0.183868 0.005227 0.194344
0.001698 0.243453
0.009141
0.362115
0.065281 0.007522 0.309766
0.072201 0.001296 0.247149
0.059126
0.063711 0.003939
0.058500 0.000846
0.076504 0.002520 0.204280 0.061362
470
33
450
19
824
60
55
453
36
0.35
0.55
0.001648
438
46
427
26
714
55
60
429
49
0.05
0.82
0.001742 0.299192
0.059359 0.001096
437
15
428
11
580
40
74
430
19
0.36
0.55
0.010011 0.262972
0.074511 0.004454
522
102
471
60
1055
120
45
479
114
0.23
0.63
0.064359
463
32
446
15
753
69
59
448
29
0.28
0.60
Sample KSH-11-28 continued:
0.002111
349
98
1223
529
126
73
44
66
43
267
171
86
990
131
1411
462
155
93
66
98
93
240
155
108
0.353
0.747
0.867
1.146
0.816
0.789
0.656
0.674
0.466
1.113
1.101
0.793
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
1088
482
437
471
438
471
426
434
463
451
640
465
53
41
15
22
48
56
53
46
60
19
43
35
376
67
69
51
41
225
84
69
77
67
63
119
519
159
561
254
331
71
97
68
124
453
113
82
91
91
79
147
428
172
595
246
1.136
0.939
0.709
0.745
0.332
0.497
0.743
0.849
0.848
0.735
0.793
0.808
1.212
0.927
0.943
1.033
206
Pb/238 U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
463
458
486
455
478
525
464
505
457
414
435
436
468
453
450
476
18
65
38
33
28
107
42
106
29
85
47
50
30
51
15
29
108
191
108
215
479
68
101
120
187
119
203
400
76
118
0.904
1.021
0.907
1.060
1.200
0.895
0.854
206
438
442
453
429
430
479
448
47
55
36
49
19
114
29
Pb/238 U
concordia
concordia
concordia
concordia
concordia
concordia
jl31b57
0.569520
jl31b58
0.563041 0.033875
jl31b59
0.580264
jl30b07
jl30b12
0.053058 0.074522
0.003431 0.247095 0.062540 0.002308
0.071286 0.002528
0.294711 0.062882 0.001985
458
34
463
21
693
79
67
462
39
0.03
0.87
454
22
444
15
704
67
63
446
28
0.18
0.67
70
459
52
0.03
0.86
0.066057 0.073432 0.004689 0.280442
0.061310 0.002067
465
42
457
28
650
72
0.816756
0.176312
0.095030 0.003690
606
99
495
29
1529
73
32
499
58
1.14
0 .2 9
0.731521
0.068482 0.077068 0.003885 0.269240 0.078367 0.002290
557
40
479
23
1156
58
41
491
45
3.57
0 .0 6
jl30b13
0.710283
0.093471 0.076022
0.005104 0.255108
0.002291
545
55
472
31
982
65
48
482
59
1.59
0 .2 1
jl30b20
0.683969
0.127006
0.008149 0.296309 0.072552 0.003013
529
77
461
49
1001
84
46
473
93
0.75
0 .3 9
jl30b31
0.562705
0.084398 0.080907 0.006862 0.282738 0.052891 0.001714
453
55
502
41
324
74
15 5
486
73
0.70
0 .4 0
jl30b37
0.706278
0.118555
0.074943 0.006429 0.255524 0.074602 0.003222
543
71
466
39
1058
87
44
476
74
1.10
0 .3 0
jl30b43
0.261137
0.033091
0.028810 0.003435 0.470484 0.075302 0.001534
236
27
183
22
1077
41
17
198
41
4.24
0 .0 4
jl30b60
0.423600
0.066821 0.043653 0.008560 0.621564
0.070747 0.001079
359
48
275
53
950
31
29
324
91
3.55
0 .0 6
jl31b12
0.668066
0.045879
0.076541 0.002893 0.275232 0.066076 0.002039
520
28
475
17
809
65
59
484
33
2.32
0 .13
jl31b14
0.206519
0.013662
0.020547
0.001552 0.570832 0.070071 0.000781
191
11
131
10
930
23
14
148
19
34.57 0 .0 0
jl31b17
0.160850
0.007939
0.013186
0.000700 0.537912
0.087332 0.001087
151
7
84
4
1368
24
6
88
9
121.98 0 .0 0
jl31b19
0.157495
0.010975
0.011804
0.001346 0.817957
0.092645 0.001693
149
10
76
9
1481
35
5
78
17
161.10 0 .0 0
jl31b20
0.707217
0.118758
0.070586 0.003984 0.168077
0.090589 0.004829
543
71
440
24
1438
102
31
444
47
1.95
0 .16
jl31b21
0.360794
0.072982 0.036072 0.008457 0.579491 0.067656 0.000871
313
54
228
53
858
27
27
262
97
2.88
0 .0 9
jl31b30
0.642429
0.041863
0.060937 0.001693
504
26
453
16
637
60
71
463
30
3.57
0 .0 6
jl31b31
0.332921 0.027392
0.040122
0.001815
0.274938 0.070469 0.001464
292
21
254
11
942
43
27
259
22
3.28
0 .0 7
jl31b33
0.316572
0.014211
0.033957
0.001266 0.415385
279
11
215
8
920
24
23
229
15
35.68 0 .0 0
0.079890 0.004932 0.142994
0.074049
0.072839 0.002672 0.281437
0.071864
0.069726 0.000801
jl31b48
1.348956
0.231159
0.120160
0.017695 0.429692 0.079103
0.001711
867
100
731
102
1175
43
62
793
176
1.54
0 .2 2
jl31b49
0.586273
0.033426
0.070417 0.002622 0.326530 0.058172
0.001416
468
21
439
16
536
53
82
447
29
1.80
0 .18
Sample KSH-11-39:
93
134
74
96
118
101
0.963
1.139
0.735
concordia
concordia
concordia
45
148
98
56
125
65
7812
3571
49
7054
6740
6021
76
3941
86
6891
5987
91
259
75
160
118
82
137
79
4148
2449
68
5185
6093
3624
97
2011
108
3146
3192
184
246
0.591
0.929
0.830
0.689
0.910
0.817
1.883
1.458
0.723
1.361
1.106
1.662
0.776
1.959
0.797
2.190
1.876
0.494
1.056
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
462
446
459
39
28
52
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
±1σ
Rho
Pb
206
Pb
207
±1σ
Pb ±1σ
235
U (Ma)
206
Pb ±1σ
238
U (Ma)
207
206
Pb ±1σ U/Pb Concordia M SWD P ro b. 232 Th 238 U
Pb (Ma) Pb/Pb age ±2σ (Ma)(of concordance)
(ppm) (ppm) Th/U
(a)
(b)
(c)
Age used Age ±2σ (Ma)
(d)
(e)
0.534
0.463
1.463
0.721
0.639
1.287
0.790
1.029
0.727
1.205
1.277
0.693
0.536
0.582
0.570
0.633
0.738
0.901
0.459
0.685
0.611
0.632
0.718
0.653
1.091
0.537
0.497
1.277
1.367
0.892
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
Sample KSH-11-39 (37.95398°N, 78.00282°W)
au01b05
0.568507
0.023523 0.072860
0.001455 0.241385
0.054406 0.000979
457
15
453
9
388
40
117
454
17
0.06
au01b06
0.548986
0.039749 0.072475 0.002437 0.232175
0.058250 0.001202
444
26
451
15
539
45
84
450
28
0.06
au01b07
0.579137
0.012301
0.074161
0.001052 0.333855 0.056977 0.000546
464
8
461
6
491
21
94
462
11
0.11
au01b10
0.557077
0.036889 0.069734
0.002731 0.295705 0.059650 0.001016
450
24
435
16
591
37
74
438
31
0.37
au01b100
0.597452
0.029448 0.074747
0.002471 0.335286 0.056529 0.001418
476
19
465
15
473
55
98
468
27
0.31
au01b101
0.567459
0.013844
0.072632 0.000962 0.271429
456
9
452
6
497
25
91
453
11
0.22
au01b102
0.603982
0.050710
0.076267 0.002563 0.200096 0.064018
0.001513
480
32
474
15
742
50
64
475
30
0.03
au01b105
0.576683
0.022540 0.074455
0.001426 0.244948 0.059136 0.000974
462
15
463
9
572
36
81
463
16
0.00
au01b106
0.517518
0.074216
0.073738 0.006442 0.304618
0.053686 0.001449
423
50
459
39
358
61
128
447
69
0.45
au01b107
0.542438
0.018620
0.071852
0.058519 0.002386
440
12
447
9
549
89
81
445
16
0.33
au01b108
0.586447
0.022970 0.074708
0.002317 0.395888 0.059378 0.000802
469
15
464
14
581
29
80
466
24
0.07
au01b109
0.549757
0.062398
0.060721 0.001383
445
41
468
20
629
49
74
465
39
0.31
au01b11
0.572435
0.033972 0.075388 0.002055 0.229694 0.057757 0.001359
460
22
469
12
521
52
90
467
23
0.16
au01b110
0.580139
0.035591 0.074452 0.002549 0.279087 0.069239 0.011409
465
23
463
15
906
340
51
463
28
0.00
au01b111
0.575019
0.051326
461
33
443
16
786
74
56
445
31
0.30
au01b112
0.545951 0.040301
0.071408 0.002735 0.259461 0.058718
0.001352
442
26
445
16
557
50
80
444
31
0.01
au01b115
2.161544
0.113094
0.199560 0.009479 0.453921 0.080229 0.000794
1169
36
1173
51
1203
20
98
1170
70
0.01
au01b116
0.553918
0.038770 0.070024 0.003767 0.384333
0.058111
0.001119
448
25
436
23
534
42
82
441
40
0.18
au01b117
0.596221 0.038944 0.074282 0.002490 0.256641 0.062015
0.001450
475
25
462
15
675
50
68
464
28
0.26
au01b118
0.601134
0.026919
0.076674
0.001769 0.257596 0.059257 0.001221
478
17
476
11
577
45
83
477
20
0.01
au01b119
0.579166
0.031089
0.073256
0.003019 0.383883 0.059087 0.001047
464
20
456
18
570
39
80
459
32
0.15
au01b12
0.615232
0.032695 0.076789
0.002147 0.263024 0.059163
0.001180
487
21
477
13
573
43
83
479
24
0.22
au01b120
0.574352
0.026784 0.073789
0.001535 0.223093 0.057416
0.001152
461
17
459
9
508
44
90
459
18
0.01
au01b121
0.542018
0.038895 0.069607 0.002650 0.265287
0.001562
440
26
434
16
645
55
67
435
30
0.05
au01b122
0.570113
0.024596
0.073051 0.003182 0.504759 0.056813 0.000599
458
16
455
19
484
23
94
457
30
0.04
au01b125
0.664445
0.044521 0.082429
0.003149 0.285054 0.063358 0.001400
517
27
511
19
720
47
71
512
35
0.06
au01b126
0.599349
0.036706 0.076392
0.002312 0.247074 0.061739
0.001503
477
23
475
14
665
52
71
475
26
0.01
au01b127
0.568481
0.019931 0.073397
0.001951 0.379073 0.056948 0.000604
457
13
457
12
490
23
93
457
20
0.00
au01b128
0.541409
0.018653
0.069839
0.001755 0.364720 0.058061 0.000464
439
12
435
11
532
17
82
437
19
0.10
au01b129
0.549756
0.022843 0.070845
0.001769 0.300535 0.059799 0.001015
445
15
441
11
596
37
74
442
20
0.05
0.001439 0.291669
0.075281 0.003366 0.196949
0.071111
0.002707 0.213270
Sample KSH-11-39 continued:
0.057152 0.000646
0.065358 0.002302
0.061164
118
86
0.74 1714
0.55
166
0.58
157
0.64 3428
0.86
393
0.97
699
0.50
331
0.57 2080
0.79 2430
0.58
361
0.69
89
0.95
275
0.59
159
0.93
312
0.93
582
0.67
618
0.61 158
0.92
321
0.70
323
0.64
147
0.92
427
0.82
111
0.84 1628
0.81
90
0.92
80
0.97 1353
0.75 2498
0.82
413
0.81
0.80
221
185
1172
230
245
2664
498
680
455
1726
1902
521
167
473
278
493
789
686
343
469
529
233
596
171
1493
167
161
1060
1827
464
454
450
462
438
468
453
475
463
447
445
466
465
467
463
445
444
1170
441
464
477
459
479
459
435
457
512
475
457
437
442
17
28
11
31
27
11
30
16
69
16
24
39
23
28
31
31
70
40
28
20
32
24
18
30
30
35
26
20
19
20
au01b130
0.559197
0.033836
0.073813 0.002024 0.226543 0.054615
0.001399
451
22
459
12
396
57
116
458
23
0.13
0.72
au01b131
0.549697
0.028357
0.071798
0.001729 0.233449 0.057836 0.001246
445
19
447
10
524
47
85
447
20
0.01
0.91
au01b135
0.694587
0.018890
0.087350
0.002137 0.449720 0.057823 0.000578
536
11
540
13
523
22
103
537
20
0.12
0.73
au01b136
0.568389
0.023007 0.074652
0.001754 0.290255 0.107336 0.050745
457
15
464
11
1755
865
26
462
19
0.21
0.64
au01b137
0.570252
0.028727
0.001783 0.238575 0.059250 0.001299
458
19
461
11
576
48
80
461
20
0.03
0.87
au01b138
0.600714
0.035161 0.077759 0.002702 0.296808 0.058634 0.001477
478
22
483
16
554
55
87
481
29
0.05
0.83
au01b15
0.644526
0.066905
505
41
478
41
682
63
70
491
70
0.39
0.53
au01b16
0.581382
0.029694 0.075237
0.001503 0.195506
0.060031 0.001214
465
19
468
9
605
44
77
467
17
0.01
0.91
au01b17
0.552692
0.035450 0.069245 0.002275 0.256100
0.059245 0.001257
447
23
432
14
576
46
75
434
26
0.40
0.53
au01b18
0.504703
0.025261
0.068199 0.002229 0.326541 0.053768 0.001003
415
17
425
13
361
42
118
422
24
0.34
0.56
au01b19
0.516881
0.045823
0.071140
0.002821 0.223677 0.057302 0.001375
423
31
443
17
503
53
88
439
32
0.41
0.52
au01b20
0.591781
0.030905 0.074507
0.002371 0.304675 0.056124
0.000851
472
20
463
14
457
34
101
466
26
0.18
0.67
au01b21
0.558208
0.042600
0.069541 0.002860 0.269464 0.058265 0.000972
450
28
433
17
540
37
80
437
32
0.35
0.55
au01b22
0.592696
0.040395 0.073779 0.002763 0.274698 0.058415 0.000972
473
26
459
17
545
36
84
462
31
0.26
0.61
au01b25
0.589554
0.037750 0.072904 0.002524 0.270364
0.060141 0.001130
471
24
454
15
609
41
75
457
28
0.46
0.50
au01b26
0.613527
0.020327 0.077562
0.001193
0.232206 0.057484 0.000833
486
13
482
7
510
32
94
482
14
0.10
0.75
au01b29
0.563893
0.028633 0.073063
0.001744 0.235084 0.067009 0.009329
454
19
455
10
838
290
54
454
20
0.00
0.98
au01b30
0.565079
0.041452
0.073035 0.002465 0.230094 0.060815
0.001351
455
27
454
15
633
48
72
454
28
0.00
0.99
au01b32
0.560313
0.023881
0.071898
0.001520 0.247963 0.055668 0.001095
452
16
448
9
439
44
102
448
17
0.07
0.79
au01b35
0.630718
0.040175
0.077560
0.003421 0.346253 0.056739 0.000795
497
25
482
20
481
31
100
487
37
0.32
0.57
au01b36
0.597229
0.061439
0.075245 0.004335 0.279997 0.058656 0.001359
475
39
468
26
554
51
84
470
48
0.04
0.85
au01b37
0.544011
0.050609
0.071106
441
33
443
20
583
72
76
442
37
0.00
0.96
au01b38
0.590403
0.037732 0.073768 0.002763 0.293049 0.057169
0.000810
471
24
459
17
498
31
92
462
31
0.24
0.62
au01b39
0.649851 0.061942
0.059848 0.001673
508
38
483
29
598
61
81
490
52
0.41
0.52
au01b40
0.600186
0.050492 0.073997
0.003211 0.257926 0.060009 0.001239
477
32
460
19
604
45
76
463
36
0.27
0.60
au01b41
0.573993
0.029866 0.072742
0.001935 0.255624
0.057411 0.001019
461
19
453
12
507
39
89
454
22
0.16
0.69
au01b42
0.596772
0.045099 0.073388 0.002604 0.234777
0.061018
0.001519
475
29
457
16
640
54
71
459
30
0.40
0.53
au01b45
0.576809
0.034896 0.073395
0.003154
0.355114
0.055519 0.000464
462
22
457
19
433
19
105
459
34
0.06
0.81
au01b46
0.649186
0.036469 0.084553
0.001776 0.186909
0.055583 0.000891
508
22
523
11
436
36
120
521
20
0.45
0.50
au01b47
0.631817
0.063064
0.004251 0.279384 0.062784 0.001862
497
39
473
25
701
63
68
479
48
0.34
0.56
au01b50
0.611683
0.040779 0.075443
0.002169 0.215665
0.063244 0.001576
485
26
469
13
716
53
65
471
25
0.36
0.55
au01b51
0.600171
0.024888 0.078562
0.001654 0.253806 0.055794 0.001050
477
16
488
10
444
42
110
485
18
0.39
0.53
au01b52
0.605816
0.040304 0.078240 0.002288
0.056705 0.001296
481
25
486
14
480
50
101
485
26
0.03
0.86
au01b55
0.543135
0.038034
0.071958 0.002386 0.236726 0.057804 0.001352
440
25
448
14
522
51
86
447
27
0.08
0.77
au01b57
0.576901 0.043560
0.071121 0.003625 0.337558 0.057560 0.000643
462
28
443
22
513
25
86
449
40
0.45
0.50
0.074184
0.076914 0.006907 0.432547 0.062227 0.001844
0.003251 0.245745 0.059434 0.001972
0.077763 0.004784 0.322719
0.076215
Sample KSH-11-39 continued:
0.219810
56
100
1410
604
99
64
102
92
103
132
129
258
478
287
153
331
207
104
132
431
77
47
465
58
81
152
97
2318
416
72
80
83
99
77
1122
156
164
1189
886
189
116
172
207
204
219
202
362
632
341
264
451
282
196
257
658
196
107
651
106
187
266
198
1774
437
146
172
193
200
182
1283
0.359
0.609
1.186
0.682
0.524
0.551
0.592
0.444
0.503
0.604
0.641
0.714
0.756
0.840
0.579
0.734
0.736
0.531
0.514
0.655
0.391
0.441
0.715
0.543
0.430
0.573
0.490
1.307
0.954
0.492
0.468
0.429
0.494
0.426
0.874
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
458
447
537
462
461
481
491
467
434
422
439
466
437
462
457
482
454
454
448
487
470
442
462
490
463
454
459
459
521
479
471
485
485
447
449
23
20
20
19
20
29
70
17
26
24
32
26
32
31
28
14
20
28
17
37
48
37
31
52
36
22
30
34
20
48
25
18
26
27
40
au01b58
0.557683
0.034333 0.072669
0.002124 0.237421 0.057123
0.001202
450
22
452
13
496
46
91
452
24
0.01
0.92
au01b59
0.533385
0.040988 0.068538
0.002951 0.280168
0.001596
434
27
427
18
664
55
64
429
33
0.06
0.81
au01b61
0.583310
0.033060 0.073487 0.002295 0.275500 0.059492 0.001195
467
21
457
14
585
44
78
459
26
0.19
0.67
au01b62
0.620009
0.029393
0.078105
0.001795 0.242435 0.059777 0.001097
490
18
485
11
596
40
81
486
20
0.07
0.79
au01b65
0.562863
0.026116
0.074372
0.001802
0.055778 0.001137
453
17
462
11
444
45
104
460
20
0.27
0.61
au01b66
0.590245
0.031576
0.076389 0.002530 0.309594 0.059473 0.000964
471
20
475
15
584
35
81
473
27
0.03
0.87
au01b67
0.548846
0.024171
0.071900
0.001807 0.285401 0.056408 0.001003
444
16
448
11
468
39
96
447
20
0.04
0.84
au01b68
0.588622
0.020089 0.075526
0.001471 0.285350 0.057091 0.000726
470
13
469
9
495
28
95
470
16
0.00
0.96
au01b69
0.584377
0.026932 0.076850 0.002225 0.314034
0.058062 0.001048
467
17
477
13
532
40
90
474
24
0.31
0.58
au01b70
0.595168
0.028851 0.078487
0.001885 0.247724 0.056396 0.001164
474
18
487
11
468
46
104
484
21
0.47
0.50
au01b71
0.503007
0.042839 0.067755 0.004052
au01b72
0.542592
0.045270
au01b75
0.261117
0.061707
0.056156
0.001491
414
29
423
24
459
59
92
419
43
0.08
0.77
0.002771 0.232694 0.061635
0.001397
440
30
444
17
661
49
67
444
32
0.02
0.89
0.591736
0.036260 0.075575 0.002459 0.265496 0.059786 0.001244
472
23
470
15
596
45
79
470
28
0.01
0.92
au01b76
0.672637
0.058646 0.080939 0.003647 0.258399 0.063790 0.001794
522
36
502
22
735
60
68
506
41
0.31
0.58
au01b77
0.630986
0.076492 0.075059 0.005439 0.298857 0.064219 0.002082
497
48
467
33
749
68
62
474
61
0.37
0.54
au01b78
0.730469
0.063112
557
37
578
18
576
74
100
575
34
0.33
0.57
au01b79
0.587992
0.037890 0.074768 0.002784 0.288907 0.061658
0.001247
470
24
465
17
662
43
70
466
31
0.04
0.85
au01b80
0.582444
0.043153
0.052808 0.001580
466
28
481
20
321
68
150
476
36
0.25
0.62
au01b81
0.564443
0.026593 0.074079
0.001884 0.269948 0.057908 0.000806
454
17
461
11
526
31
88
459
21
0.12
0.73
au01b82
0.602937
0.052457 0.076890
0.004149 0.310098
0.060541 0.001573
479
33
478
25
623
56
77
478
45
0.00
0.96
au01b85
0.573578
0.024110
0.072520
0.001812
0.297155
0.059832 0.001027
460
16
451
11
598
37
76
454
20
0.31
0.58
au01b86
0.563512
0.027616
0.075139 0.003023 0.410458
0.056088 0.000507
454
18
467
18
456
20
102
460
30
0.46
0.50
au01b87
0.643621 0.033998 0.082662 0.002400 0.274786 0.058935 0.001340
505
21
512
14
565
50
91
510
26
0.12
0.73
au01b88
0.596210
0.038372 0.075945 0.002566 0.262482 0.058283 0.001283
475
24
472
15
540
48
87
473
29
0.01
0.91
au01b89
0.606495
0.065575 0.073805
0.003010 0.188572
0.068048 0.001938
481
41
459
18
870
59
53
461
35
0.28
0.60
au01b91
0.594420
0.031962
0.002341 0.283519
0.057333 0.001385
474
20
477
14
504
53
95
476
26
0.02
0.88
au01b92
0.605375
0.017301 0.076947
0.001252 0.284570 0.059375 0.000681
481
11
478
7
581
25
82
479
14
0.06
0.81
au01b95
0.570017
0.055039 0.073690 0.003354 0.235679 0.062407 0.001295
458
36
458
20
688
44
67
458
38
0.00
0.99
au01b96
0.590018
0.035581
471
23
476
11
614
72
78
475
22
0.05
0.82
au01b97
0.585473
0.022844 0.073965
0.001607 0.278382 0.060339 0.001103
468
15
460
10
616
39
75
462
18
0.28
0.60
au01b98
0.627920
0.033435 0.078745
0.002144 0.255678 0.061349
0.001566
495
21
489
13
652
55
75
490
24
0.08
0.77
au01b99
0.582683
0.025665
0.075717
0.001849 0.277190
0.060103 0.003050
466
16
471
11
607
110
77
469
20
0.06
0.80
au01b08
0.565334
0.038215
0.068073 0.002855 0.310246
0.063781 0.001772
455
25
425
17
734
59
58
432
32
1.41
0 .2 3
au01b09
0.306178
0.017888
0.034384
0.001086 0.270424 0.068601 0.000924
271
14
218
7
887
28
25
223
13
0.071356
0.093870
0.351119
0.002971 0.183168
0.077396 0.003347 0.291806
0.076780
0.059247 0.002024
0.076671 0.001896 0.205073 0.060291 0.002002
Sample KSH-11-39 continued:
14.46 0 .0 0
145
144
93
98
75
413
353
545
215
179
91
99
124
101
43
45
124
52
662
60
541
1913
77
150
89
197
1511
427
193
438
195
577
255
171
174
210
140
437
440
752
322
262
170
177
194
197
105
101
240
120
953
131
617
1600
159
232
165
410
1557
596
331
600
313
756
0.568
0.843
0.534
0.469
0.539
0.945
0.803
0.725
0.666
0.686
0.535
0.558
0.640
0.514
0.405
0.445
0.516
0.436
0.695
0.460
0.876
1.196
0.486
0.645
0.543
0.480
0.970
0.716
0.582
0.729
0.624
0.763
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
78 112 0.691
4676 2303 2.030
not used
not used
452
429
459
486
460
473
447
470
474
484
419
444
470
506
474
575
466
476
459
478
454
460
510
473
461
476
479
458
475
462
490
469
24
33
26
20
20
27
20
16
24
21
43
32
28
41
61
34
31
36
21
45
20
30
26
29
35
26
14
38
22
18
24
20
au01b27
0.341997
0.056555
0.089913
0.002125
299
43
200
21
1424
45
14
206
41
5.31 0 .0 2
au01b28
0.565255
0.038642 0.064723 0.006685 0.755377 0.060619
0.001078
455
25
404
40
626
38
65
464
49
3.53
au01b31
0.600344
0.079894 0.069639 0.007652 0.412847
0.000715
477
51
434
46
582
26
75
451
82
0.67
0 .4 1
au01b48
0.580477
0.032290 0.068756 0.002888 0.377495 0.057495 0.000767
465
21
429
17
511
29
84
441
31
2.79
0 .0 9
au01b49
0.628647
0.054303
0.071855 0.003626 0.292132
0.062898 0.001709
495
34
447
22
705
58
63
457
41
1.87
0 .17
au01b56
0.601534
0.039797
0.073135
0.062786 0.001573
478
25
455
11
701
53
65
457
21
0.81 0 .3 7
au01b60
0.695782
0.064037 0.075764 0.004986 0.357538
0.061021 0.001478
536
38
471
30
640
52
74
489
55
2.69
0 .10
au01b90
0.520039
0.029747 0.073680 0.002766 0.328198
0.054475 0.001153
425
20
458
17
391
48
117
446
29
2.44
0 .12
Sample KSH-11-40:
0.031469
0.003314 0.318390
0.001812
0.187278
0.059415
0 .0 6
3116
521
607
641
127
155
132
91
967
788
1247
1178
229
243
215
223
3.224
0.660
0.487
0.544
0.555
0.637
0.612
0.407
not used
not used
not used
not used
not used
not used
not used
not used
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
±1σ
Rho
Pb
206
Pb
207
±1σ
Pb ±1σ
235
U (Ma)
206
Pb ±1σ
238
U (Ma)
207
206
Pb ±1σ U/Pb Concordia M SWD P ro b. 232 Th 238 U
Pb (Ma) Pb/Pb age ±2σ (Ma)(of concordance)
(ppm) (ppm) Th/U
(a)
(b)
(c)
(d)
Age used Age ±2σ (Ma)
(e)
Sample KSH-11-40 (38.41893°N, 77.63665°W)
1363
46
1397
42
1475
66
95
1381
70
0.40
0.53
0.001569
1988
29
1967
43
1990
23
99
1983
55
0.27
0.60
0.196705 0.004946 0.297953 0.082207 0.001435
1166
29
1158
27
1250
34
93
1161
45
0.06
0.81
0.193607 0.004994 0.279609
0.081154
0.001096
1147
32
1141
27
1225
27
93
1143
46
0.03
0.86
0.080013
0.129020 0.004353 0.252014
0.072316
0.001873
798
37
782
25
995
53
79
786
46
0.17
0.68
0.110413
0.130272
0.010038 0.422426
0.066112
0.001169
805
51
789
57
810
37
97
799
91
0.08
0.78
1.051525
0.091939
0.115004
0.005662 0.281523
0.068286 0.001808
730
46
702
33
877
55
80
709
60
0.33
0.56
au06a103
2.708014
0.121460
0.226299
0.009128 0.449667 0.085590 0.000836
1331
33
1315
48
1329
19
99
1328
64
0.12
0.73
au06a104
1.700613
0.067457
0.166013
0.003893 0.295596 0.076149 0.000936
1009
25
990
22
1099
25
90
997
37
0.44
0.51
au06a107
2.336735
0.152200
0.208655 0.008460
1224
46
1222
45
1269
39
96
1223
74
0.00
0.97
au06a108
2.075275
0.068702
0.194959 0.003902 0.302254 0.077744 0.001074
1141
23
1148
21
1140
27
101
1145
35
0.08
0.77
au06a109
2.189656
0.073300
0.200114
0.001099
1178
23
1176
24
1226
27
96
1177
38
0.00
0.95
au06a11
2.101449
0.050920
0.194696 0.003650 0.386870 0.077227 0.000480
1149
17
1147
20
1127
12
102
1148
30
0.02
0.90
au06a110
1.627417
0.032265
0.163002
0.003001 0.464354 0.072610 0.000395
981
12
973
17
1003
11
97
979
24
0.23
0.63
au06a111
0.890531 0.064505
0.107192
0.003753 0.241707
0.002319
647
35
656
22
903
69
73
654
41
0.07
0.79
au06a112
8.173039
0.405657
0.407157
0.018048 0.446533 0.145093 0.000966
2250
45
2202
83
2289
11
96
2247
90
0.43
0.51
au06a113
1.521013
0.032974
0.156892 0.002627 0.386246 0.070332 0.000443
939
13
939
15
938
13
100
939
23
0.00
0.97
au06a114
1.846388
0.096565
0.181303
0.007445 0.392596 0.074290 0.000959
1062
34
1074
41
1049
26
102
1066
62
0.08
0.77
au06a117
1.708094
0.257917
0.172757
0.015361 0.294428 0.074003 0.002261
1012
97
1027
84
1042
62
99
1021
144
0.02
0.88
au06a118
1.724607
0.047045
0.171376
0.003465 0.370589 0.072831 0.000477
1018
18
1020
19
1009
13
101
1019
30
0.01
0.92
au06a119
2.404979
0.241689
0.216619
0.012414
0.085132 0.002087
1244
72
1264
66
1319
48
96
1255
110
0.06
0.81
au06a12
2.391357
0.103979
0.210919
0.005477 0.298619
0.081716
0.001428
1240
31
1234
29
1239
34
100
1237
49
0.03
0.86
au06a120
2.151068
0.134493
0.202708 0.006454 0.254633 0.081070
0.001426
1165
43
1190
35
1223
35
97
1181
60
0.26
0.61
au06a121
5.519048
0.249885 0.344548
0.011656
0.373600
0.116989
0.001970
1904
39
1909
56
1911
30
100
1905
73
0.01
0.93
au06a122
5.379161
0.275325
0.016059 0.472941
0.114838
0.001030
1882
44
1847
78
1877
16
98
1879
87
0.26
0.61
au06a123
2.780421 0.093885 0.229294
0.005413 0.349575 0.087401 0.000898
1350
25
1331
28
1369
20
97
1342
44
0.40
0.53
au06a124
2.097858
0.109219
0.191661 0.006462 0.323825
0.077191 0.001309
1148
36
1130
35
1126
34
100
1139
58
0.19
0.67
au06a127
2.049852
0.096906
0.192133
0.077309 0.001159
1132
32
1133
34
1129
30
100
1133
54
0.00
0.99
au06a128
6.577829
0.176549
0.370758 0.008233 0.413680
0.128555
2056
24
2033
39
2078
11
98
2053
46
0.42
0.52
au06a13
0.837231 0.090667 0.097785
618
50
601
32
777
59
77
605
60
0.10
0.76
au06a07
2.827503
0.173860
au06a08
6.084286
0.202709 0.356704 0.008959 0.376948 0.122293
au06a09
2.151622
0.090785
au06a10
2.094421 0.096600
au06a100
1.195443
au06a101
1.210665
au06a102
0.241904
0.331696
0.008137 0.273513
0.311250
0.004410 0.329182
0.006198
0.285136
0.341168
0.005531 0.261172
Sample KSH-11-40 continued:
0.092389 0.003206
0.082973 0.001647
0.081207
0.069159
0.000821
0.065092 0.001814
24
21 1.142
41
70 0.585
51
85 0.605
87 218 0.400
63 106 0.590
109 169 0.643
61
75 0.808
131 366 0.358
74 199 0.372
30
64 0.474
41 115 0.358
94 135 0.693
98 783 0.125
706 1657 0.426
20
50 0.404
78 307 0.254
100 1048 0.095
47 185 0.254
13
49 0.259
414 986 0.420
12
33 0.348
33
81 0.403
48
91 0.523
59
46 1.265
39 221 0.177
85 202 0.422
36
86 0.419
41 121 0.338
80 305 0.262
49
89 0.553
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
1381
1983
1161
1143
786
799
709
1328
997
1223
1145
1177
1148
979
654
2247
939
1066
1021
1019
1255
1237
1181
1905
1879
1342
1139
1133
2053
605
70
55
45
46
46
91
60
64
37
74
35
38
30
24
41
90
23
62
144
30
110
49
60
73
87
44
58
54
46
60
au06a130
2.126263
0.097592
0.195467
0.006112
0.340621 0.078960 0.001295
1157
32
1151
33
1171
32
98
1154
53
0.03
0.86
au06a131
3.205375
0.213503
0.248249
0.010060 0.304204 0.093427 0.001784
1458
52
1429
52
1497
36
96
1444
84
0.22
0.64
au06a132
2.283121
0.084648 0.206454
0.004714 0.307916
0.078109
0.001220
1207
26
1210
25
1150
31
105
1209
41
0.01
0.93
au06a133
5.962738
0.310645
0.352857
0.015554 0.423057
0.119535 0.002048
1970
45
1948
74
1949
31
100
1967
89
0.10
0.75
au06a134
1.417126
0.094089
0.144739 0.004998 0.260069 0.073090 0.001530
896
40
871
28
1016
42
86
878
51
0.34
0.56
au06a135
0.896916
0.050928
0.107021 0.002625 0.215977
0.065915 0.004687
650
27
655
15
804
149
82
654
29
0.04
0.85
au06a137
0.687717
0.055201 0.085789 0.003863 0.280522 0.056648 0.001408
531
33
531
23
478
55
111
531
42
0.00
0.98
au06a138
0.730360
0.059243 0.087998 0.002849 0.199559
0.001242
557
35
544
17
778
40
70
545
32
0.13
0.71
au06a139
1.619519
0.087191
0.167430
0.006143 0.340747 0.070721 0.001831
978
34
998
34
949
53
105
988
55
0.27
0.60
au06a14
1.162621
0.061777
0.125696 0.005429 0.406460
0.065311 0.000802
783
29
763
31
784
26
97
774
50
0.37
0.54
au06a140
2.437270
0.119143
0.213290 0.007292 0.349689 0.080035 0.001480
1254
35
1246
39
1198
36
104
1251
61
0.03
0.86
au06a141
2.344330
0.230402
0.218154
0.012808 0.298692 0.079188
0.001945
1226
70
1272
68
1177
49
108
1249
110
0.33
0.57
au06a142
1.705128
0.073341
0.171155
0.003986 0.270741 0.072824 0.001443
1010
28
1018
22
1009
40
101
1016
38
0.07
0.79
au06a143
0.921599
0.030997
0.108472 0.002922 0.400410
0.060665 0.000511
663
16
664
17
627
18
106
664
28
0.00
0.97
au06a17
1.318588
0.072058
0.143747
0.004515 0.287376 0.068470 0.002084
854
32
866
25
883
63
98
862
45
0.12
0.73
au06a18
0.810876
0.029448 0.098725
0.001937 0.270145
603
17
607
11
626
29
97
606
21
0.05
0.82
au06a19
5.710181
0.420334 0.335274
0.020170 0.408638 0.123835
0.001031
1933
64
1864
97
2012
15
93
1920
124
0.57
0 .4 5
au06a20
4.934447
0.313281
0.315013
0.018008 0.450196
0.000850
1808
54
1765
88
1826
14
97
1803
106
0.29
0.59
au06a21
2.900125
0.191962
0.231285
0.010202 0.333208 0.090240 0.001330
1382
50
1341
53
1431
28
94
1363
85
0.46
0.50
au06a22
1.593640
0.146361
0.157770
0.010635 0.366976 0.075134
0.001758
968
57
944
59
1072
47
88
956
97
0.13
0.72
au06a23
0.690142
0.062196
0.086472 0.003696 0.237142
0.062197
0.001623
533
37
535
22
681
56
79
534
41
0.00
0.96
au06a24
2.225217
0.067926
0.203215 0.003900 0.314360
0.080341 0.000676
1189
21
1193
21
1205
17
99
1191
34
0.02
0.89
au06a27
5.532797
0.141600
0.342477 0.007647 0.436204
0.114981 0.000904
1906
22
1899
37
1880
14
101
1905
43
0.05
0.83
au06a28
0.664977
0.051344
0.080756 0.003253 0.260845 0.060600 0.001242
518
31
501
19
625
44
80
504
36
0.28
0.60
au06a29
2.116738
0.099266
0.197997 0.005724 0.308223 0.079345 0.001589
1154
32
1165
31
1181
40
99
1160
51
0.08
0.78
au06a30
2.325603
0.127033
0.207336 0.007390 0.326257 0.083489 0.001878
1220
39
1215
39
1281
44
95
1217
64
0.01
0.90
au06a31
2.293082
0.071121
0.204903 0.005490 0.431947
0.079290 0.000710
1210
22
1202
29
1179
18
102
1208
41
0.09
0.76
au06a32
1.050464
0.069083
0.115446
0.005026
0.070334 0.001774
729
34
704
29
938
52
75
713
51
0.45
0.50
au06a33
4.841176
0.187474
0.319038
0.008137 0.329315
0.111982
0.001739
1792
33
1785
40
1832
28
97
1790
58
0.03
0.87
au06a34
4.696902
0.202700 0.309879
0.011494
0.108921 0.001369
1767
36
1740
57
1781
23
98
1762
71
0.26
0.61
au06a37
2.489855
0.135099
0.214393
0.007156 0.307561 0.089655 0.001777
1269
39
1252
38
1418
38
88
1260
63
0.14
0.71
au06a38
0.869682
0.052104
0.106602 0.004846 0.379393 0.059027 0.001088
635
28
653
28
568
40
115
644
47
0.31
0.58
au06a39
0.771378
0.022157
0.093748
0.059324 0.000594
581
13
578
10
579
22
100
579
18
0.05
0.83
au06a40
0.742979
0.053903 0.090377 0.003246 0.247543 0.063740 0.001606
564
31
558
19
733
53
76
559
36
0.04
0.84
au06a41
2.069765
0.093180
1139
31
1124
29
1228
31
92
1131
49
0.18
0.68
0.190501
0.001680
0.331012
0.429751
0.311896
0.005381 0.313738
Sample KSH-11-40 continued:
0.065111
0.060627 0.000824
0.111620
0.081286
0.001299
30
43
56
39
32
159
78
200
17
277
33
42
36
91
53
181
88
94
98
48
93
123
141
479
43
418
57
47
91
891
60
300
0.340
0.451
0.573
0.812
0.342
1.287
0.551
0.418
0.404
0.662
0.577
0.911
0.394
0.102
0.895
0.602
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
1154
1444
1209
1967
878
654
531
545
988
774
1251
1249
1016
664
862
606
53
84
41
89
51
29
42
32
55
50
61
110
38
28
45
21
243
291
56
100
155
336
203
182
46
46
91
47
69
72
168
76
289
41
44
358
447
150
62
93
444
255
278
58
63
389
80
56
91
88
216
629
105
100
0.680
0.651
0.374
1.608
1.660
0.755
0.795
0.657
0.796
0.725
0.233
0.585
1.232
0.793
1.920
0.350
0.459
0.389
0.440
207
2012
1803
1363
956
534
1191
1905
504
1160
1217
1208
713
1790
1762
1260
644
579
559
1131
30
106
85
97
41
34
43
36
51
64
41
51
58
71
63
47
18
36
49
Pb/206 Pb
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
2070
24
2057
39
2097
10
98
2068
47
0.12
0.73
0.002187
651
46
622
31
952
63
65
629
58
0.35
0.55
0.031635 0.396357
0.135731 0.002006
2148
90
2147
146
2173
26
99
2148
175
0.00
1.00
0.014319
0.090103 0.000974
1433
43
1403
74
1428
21
98
1432
85
0.22
0.64
0.061395
0.000715
635
16
625
12
653
25
96
629
22
0.39
0.53
0.004301 0.359468 0.073820 0.000857
982
23
969
24
1037
23
93
975
39
0.23
0.63
0.082433 0.230958 0.004237 0.304526 0.085634 0.001020
1339
22
1340
22
1330
23
101
1339
36
0.00
0.97
1.103572
0.039820
0.123994 0.002878 0.321652
0.065797 0.000816
755
19
754
17
800
26
94
754
29
0.01
0.94
au06a52
3.061439
0.155332
0.241106
0.483987 0.090608 0.000759
1423
39
1392
62
1438
16
97
1419
77
0.32
0.57
au06a53
0.714251
0.054938 0.087305 0.004363 0.324827 0.061244
0.001273
547
33
540
26
648
45
83
542
46
0.05
0.82
au06a54
2.751861
0.080685
0.231136
0.004585 0.338268 0.087060 0.000975
1343
22
1340
24
1362
22
98
1342
37
0.01
0.94
au06a58
2.575930
0.184529
0.222110
0.010646 0.334532 0.080617
0.001860
1294
52
1293
56
1212
45
107
1293
88
0.00
0.99
au06a59
6.476732
0.319576
0.365290
0.012879 0.357284 0.124698
0.001421
2043
43
2007
61
2025
20
99
2033
82
0.34
0.56
au06a60
1.769723
0.099273
0.169591 0.005443 0.286077 0.079719
0.001902
1034
36
1010
30
1190
47
85
1019
53
0.37
0.54
au06a61
0.862308
0.041247
0.100554 0.002079
0.216167
0.060464
0.001131
631
22
618
12
620
40
100
620
23
0.35
0.56
au06a62
0.706286
0.108028
0.094665 0.005095
0.175951 0.059164
0.001378
543
64
583
30
573
51
102
577
57
0.39
0.53
au06a64
0.848959
0.056959 0.099674 0.003252 0.243168
0.001224
624
31
613
19
604
44
101
615
36
0.13
0.72
au06a67
0.824954
0.047438 0.096908 0.002626 0.235634 0.062186 0.000895
611
26
596
15
681
31
88
599
29
0.28
0.60
au06a68
0.814532
0.054074 0.099600 0.003574 0.270268 0.055972
0.001611
605
30
612
21
451
64
136
610
38
0.05
0.82
au06a70
8.795245
0.419657
0.001986
2317
44
2296
69
2206
25
104
2313
84
0.10
0.75
au06a71
2.434901 0.183304
0.208326 0.007333 0.233789 0.084660 0.002186
1253
54
1220
39
1308
50
93
1229
70
0.31
0.58
au06a73
3.091775
0.102231
0.244512 0.005624 0.347827 0.088403 0.001266
1431
25
1410
29
1391
27
101
1422
44
0.43
0.51
au06a74
5.174158
0.241053
0.324743
0.010332 0.341466
0.114187
0.001446
1848
40
1813
50
1867
23
97
1836
72
0.46
0.50
au06a77
5.448424
0.180951 0.340757 0.007540 0.333105
0.113325
0.001026
1893
28
1890
36
1853
16
102
1892
51
0.00
0.95
au06a78
2.384651 0.135035
0.206745 0.006663 0.284566 0.082308 0.001500
1238
41
1211
36
1253
36
97
1222
61
0.33
0.56
au06a79
6.304102
0.453265 0.356437
0.001448
2019
63
1965
86
1985
21
99
2004
118
0.38
0.54
au06a80
0.755616
0.060689 0.096753 0.002708 0.174228
0.062780 0.001759
571
35
595
16
701
60
85
592
31
0.45
0.50
au06a81
1.585151
0.091405
0.160244
0.004991 0.270051 0.071442
0.001047
964
36
958
28
970
30
99
960
49
0.03
0.87
au06a82
2.169593
0.149251
0.193389
0.008519 0.320190
0.077840 0.001254
1171
48
1140
46
1143
32
100
1154
77
0.33
0.56
au06a83
0.702430
0.056331 0.086022
0.004116
0.298355 0.060788 0.002520
540
34
532
24
632
89
84
534
45
0.06
0.81
au06a84
1.150458
0.089611
0.125843 0.005885
0.300211 0.066639 0.000892
777
42
764
34
827
28
92
769
60
0.09
0.77
au06a87
3.559259
0.200418
0.263402 0.008585 0.289407 0.098751 0.001262
1540
45
1507
44
1601
24
94
1523
71
0.40
0.53
au06a88
2.133677
0.060612
0.197233 0.003682 0.328625
0.080141 0.000942
1160
20
1160
20
1200
23
97
1160
32
0.00
0.98
au06a89
2.571265
0.414299
0.233431 0.019051 0.253256 0.090769 0.003062
1293
118
1352
100
1442
64
94
1328
168
0.21
0.65
au06a90
2.651850
0.155380
0.223797 0.006585
1315
43
1302
35
1465
50
89
1307
60
0.08
0.78
au06a42
6.678470
0.182191
0.375933 0.008306 0.404968 0.129920 0.000734
au06a43
0.898699
0.086440
0.101334
au06a44
7.291300
0.736226 0.395222
au06a47
3.102230
0.172810
0.243222
au06a48
0.869776
0.028822
0.101810
0.002136 0.316528
au06a49
1.629608
0.060115
0.162169
au06a50
2.737025
au06a51
0.427839
0.005372 0.275558 0.070818
0.011842
0.015214
0.018103
Sample KSH-11-40 con tinued:
0.528419
0.372647
0.353198
0.251104
0.060014
0.138319
0.121954
0.091895 0.002405
157
114
23
118
198
171
94
213
245
277
122
21
87
64
153
72
98
189
97
51
31
32
124
100
57
161
244
124
39
26
67
40
157
11
26
671
65
49
198
521
261
186
358
407
275
180
46
75
43
205
120
204
412
98
71
60
96
104
153
65
139
97
191
110
29
315
103
167
22
34
0.235
1.754
0.479
0.596
0.380
0.656
0.504
0.594
0.601
1.008
0.680
0.462
1.169
1.503
0.745
0.604
0.480
0.458
0.997
0.719
0.517
0.328
1.195
0.655
0.878
1.158
2.499
0.648
0.354
0.889
0.213
0.387
0.936
0.482
0.753
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
2068
629
2148
1432
629
975
1339
754
1419
542
1342
1293
2033
1019
620
577
615
599
610
2313
1229
1422
1836
1892
1222
2004
592
960
1154
534
769
1523
1160
1328
1307
47
58
175
85
22
39
36
29
77
46
37
88
82
53
23
57
36
29
38
84
70
44
72
51
61
118
31
49
77
45
60
71
32
168
60
1533
13
1524
20
1535
16
99
1531
26
0.22
0.64
0.061724
0.001873
690
38
681
25
665
65
102
683
47
0.05
0.82
0.011501 0.307569
0.114220
0.001787
1723
52
1689
57
1868
28
90
1708
88
0.28
0.60
0.004219
0.078810
0.001279
1218
27
1231
22
1167
32
105
1226
39
0.18
0.67
0.036458
0.085231 0.002557 0.279949 0.059752 0.001346
527
22
527
15
595
49
89
527
28
0.00
0.99
2.158116
0.098779
0.194265 0.005957 0.334979 0.082852 0.001539
1168
32
1144
32
1266
36
90
1156
52
0.40
0.53
au06a99
1.585969
0.061244
0.163855
965
24
978
19
1000
27
98
974
33
0.26
0.61
au06a57
0.817262
0.069229 0.092457 0.004908 0.313347
0.066368 0.001490
607
39
570
29
818
47
70
580
53
0.80
0 .3 7
au06a63
0.684721 0.023420 0.080959
0.001674 0.302257 0.060782 0.000744
530
14
502
10
632
26
79
509
18
3.56
0 .0 6
au06a69
2.023025
0.134704
0.177239
0.007146 0.302745 0.082670 0.002181
1123
45
1052
39
1261
52
83
1078
68
1.98
0 .16
au06a72
0.714363
0.045153
0.081122
0.003471 0.338437 0.069755 0.005314
547
27
503
21
921
157
55
516
38
2.53
0 .11
au06a91
3.524988
0.059873 0.266722 0.003837 0.423433 0.095375 0.000794
au06a92
0.972704
0.074330
0.111353
au06a93
4.458027
0.278196
0.299616
au06a94
2.319218
0.089006
0.210450
au06a97
0.680354
au06a98
Sample KSH-11-BUF:
0.004343 0.255193
0.261188
0.003411 0.269542 0.072498 0.000970
81
29
61
164
67
79
139
311
80
80
117
115
78
229
0.259
0.364
0.757
1.400
0.581
1.017
0.608
concordia
concordia
concordia
concordia
concordia
concordia
concordia
169
405
34
419
228
683
66
447
0.743
0.593
0.509
0.937
not used
not used
not used
not used
1531
683
1708
1226
527
1156
974
26
47
88
39
28
52
33
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
Rho
±1σ
Pb
206
Pb
207
±1σ
Pb ±1σ
235
U (Ma)
206
Pb ±1σ
238
U (Ma)
207
206
Pb ±1σ U/Pb Concordia M SWD P ro b. 232 Th 238 U
Pb (Ma) Pb/Pb age ±2σ (Ma)(of concordance)
(ppm) (ppm) Th/U
(a)
(b)
(c)
Age used Age ±2σ (Ma)
(d)
(e)
0.880
0.671
concordia
concordia
Sample KSH-11-BUF (37.65385°N, 78.36009°W)
au01a07
0.526918
0.029678 0.067082 0.002258 0.298800 0.054820 0.000797
430
20
419
14
405
33
103
421
25
0.30
0.58
au01a08
0.579418
0.033577 0.072443 0.002420 0.288193
0.056046 0.000794
464
22
451
15
454
31
99
454
27
0.35
0.55
au01a09
0.604502
0.060132
0.071040 0.006436 0.455394 0.057655 0.000981
480
38
442
39
517
37
86
461
66
0.88
0 .3 5
au01a10
1.848211
0.084825
0.179380 0.003976 0.241490
0.074964 0.001063
1063
30
1064
22
1068
29
100
1063
39
0.00
0.98
au01a11
0.551491
0.028976 0.070608
0.001457
0.057300 0.000677
446
19
440
9
503
26
87
441
17
0.10
0.75
au01a12
0.555230
0.033975
0.070615
0.002491 0.288233 0.054385 0.000804
448
22
440
15
387
33
114
442
28
0.14
0.71
au01a13
0.538432
0.025622 0.069642
0.001860 0.280702 0.054097 0.000572
437
17
434
11
375
24
116
435
21
0.04
0.85
au01a14
0.551275
0.023072 0.067935
0.002316 0.407255 0.054734 0.000598
446
15
424
14
401
24
106
433
24
1.93
au01a15
0.537340
0.035018
0.067914 0.002632 0.297291 0.056272 0.000808
437
23
424
16
463
32
91
427
29
0.30
0.58
au01a16
2.433632
0.120881 0.209679 0.005726 0.274884 0.081487
0.001130
1253
36
1227
31
1233
27
100
1237
53
0.40
0.53
au01a17
0.529347
0.044557 0.066906
0.002981 0.264674 0.056518
0.001064
431
30
417
18
473
42
88
420
34
0.21
0.65
au01a20
3.298954
0.174091
0.011422
0.429535 0.089360 0.000575
1481
41
1449
59
1412
12
103
1474
79
0.34
0.56
au01a21
0.541149
0.029423 0.067694
0.002213 0.300701 0.055857 0.000787
439
19
422
13
447
31
95
426
25
0.71 0 .4 0
au01a22
0.530465
0.026331 0.068397
0.001554 0.228804 0.055926 0.000838
432
17
426
9
449
33
95
427
18
0.10
0.75
au01a23
0.596679
0.076126
0.076106 0.006543 0.336929 0.053061 0.002509
475
48
473
39
331
107
143
474
70
0.00
0.96
au01a25
2.124227
0.205321
0.186641
0.014913
0.413323
0.077877 0.000784
1157
67
1103
81
1144
20
96
1138
123
0.44
0.51
au01a26
0.541630
0.032297
0.071196
0.001954 0.230149
0.054290 0.000936
439
21
443
12
383
39
116
443
22
0.03
0.86
au01a28
0.527056
0.028354 0.066788
0.001884 0.262109
0.057128 0.000863
430
19
417
11
496
33
84
419
21
0.46
0.50
au01a30
0.594833
0.054773
0.073510 0.007265 0.536635 0.053472 0.000883
474
35
457
44
349
37
131
469
67
0.19
0.67
au07a07
0.552876
0.015941
0.071745
0.001088 0.262948 0.054867 0.000711
447
10
447
7
407
29
110
447
12
0.00
0.98
au07a08
0.543193
0.021848
0.070246
0.001781
0.315217
0.055511 0.000854
441
14
438
11
433
34
101
438
20
0.04
0.85
au07a09
0.546421 0.024557 0.069382
0.001910
0.306196
0.056429 0.001049
443
16
432
12
469
41
92
435
21
0.37
0.54
au07a10
0.505767
0.031157
0.067665
0.002106 0.252553 0.059323 0.001052
416
21
422
13
579
39
73
421
24
0.09
0.76
au07a11
0.578084
0.110043
0.069279 0.005762 0.218443
0.075718 0.002682
463
71
432
35
1088
71
40
436
67
0.19
0.67
au07a13
0.527507
0.029394
0.068791 0.001989 0.259466 0.058280 0.000980
430
20
429
12
540
37
79
429
23
0.00
au07a14
0.509391 0.026873
0.071345
0.002451 0.325538 0.055674 0.001265
418
18
444
15
439
51
101
435
26
1.87
au07a17
0.554958
0.021707
0.070586
0.001466 0.265408 0.056120 0.000829
448
14
440
9
457
33
96
441
17
0.34
0.56
au07a18
0.532825
0.027079 0.067846 0.002628 0.381067
0.056373 0.000686
434
18
423
16
467
27
91
427
28
0.31
0.58
au07a19
0.544901 0.023948
0.069170
0.001559 0.256337 0.057931 0.000825
442
16
431
9
527
31
82
433
18
0.42
0.52
au07a20
0.555930
0.071037
0.002241 0.369436 0.055614 0.000747
449
15
442
13
437
30
101
445
24
0.16
0.69
0.023733
0.251945
0.196310
Sample KSH-11-BUF continued:
0 .16
0.95
0 .17
560
397
636
592
421
454
25
27
559 605 0.924
59 168 0.351
749 1233 0.608
573 860 0.666
556 1055 0.527
206
Pb/238 U
concordia
concordia
concordia
concordia
442
1063
441
442
435
77
39
17
28
21
578 1152 0.502
422 645 0.654
43 185 0.233
359 361 0.996
190 594 0.319
206
Pb/238 U
concordia
concordia
concordia
concordia
424
427
1237
420
1474
28
29
53
34
79
296 860 0.344
327 610 0.535
37
46 0.811
125 580 0.215
250 301 0.831
498 1182 0.422
462 445 1.037
565 653 0.865
294 414 0.711
336 310 1.081
487 517 0.942
82
93 0.887
240 338 0.710
206
422
427
474
1138
443
419
469
447
438
435
421
436
429
27
18
70
123
22
21
67
12
20
21
24
67
23
283
403
471
287
336
206
444
441
427
433
445
29
17
28
18
24
229
589
734
475
755
1.232
0.684
0.642
0.605
0.445
Pb/238 U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
Pb/238 U
concordia
concordia
concordia
concordia
998
36
967
51
1001
20
97
992
71
0.45
0.50
0.000411
1027
21
1024
25
1023
11
100
1026
38
0.01
0.92
0.057347 0.001083
448
17
444
11
505
42
88
445
20
0.06
0.81
0.001897 0.282228 0.058204 0.000683
454
17
445
11
537
26
83
447
21
0.23
0.63
436
25
431
19
431
48
100
432
34
0.04
0.84
1297
35
1299
44
1299
20
100
1298
64
0.00
0.97
463
44
448
20
824
80
54
449
38
0.11
0.74
0.058506 0.001216
445
20
444
12
549
45
81
445
23
0.00
0.97
0.009321 0.350899 0.080051 0.001945
1141
47
1139
50
1198
48
95
1140
80
0.00
0.97
0.058569 0.001742
435
30
426
21
551
65
77
428
39
0.08
0.78
0.152211
0.194661 0.008568 0.302997 0.080588 0.002522
1147
50
1147
46
1211
62
95
1147
77
0.00
0.99
1.680186
0.187515
0.167619
0.073978 0.002826
1001
71
999
64
1041
77
96
1000
109
0.00
0.98
jl31a15
0.485218
0.069007
0.063271 0.004181 0.232309 0.059503 0.001509
402
47
395
25
586
55
68
396
48
0.02
0.90
jl31a18
0.542288
0.024217
0.069765
0.054923 0.000988
440
16
435
10
409
40
106
436
18
0.10
0.75
jl31a19
0.540508
0.084589 0.064678 0.003955 0.195367
0.071673
0.002817
439
56
404
24
977
80
41
407
47
0.37
0.54
jl31a20
0.528430
0.056033
0.071528
0.003174 0.209212
0.055332 0.001453
431
37
445
19
426
59
105
443
36
0.15
0.70
jl31a21
4.146741
0.190823
0.288190
0.009541 0.359700 0.096796 0.001857
1664
38
1632
48
1563
36
104
1653
69
0.40
0.53
jl31a24
0.543903
0.027371
0.072118
0.002207 0.304097 0.055270 0.001419
441
18
449
13
423
57
106
447
24
0.18
0.67
jl31a25
2.629170
0.151105
0.228799 0.008064 0.306617
0.091749 0.009857
1309
42
1328
42
1462
204
91
1318
68
0.15
0.70
jl31a31
0.516941
0.043480 0.068269 0.003077 0.267956 0.053823 0.001929
423
29
426
19
364
81
117
425
35
0.01
0.93
jl31a33
0.537822
0.030652 0.067986 0.002275 0.293580 0.054023 0.000924
437
20
424
14
372
39
114
427
26
0.38
0.54
oc05a07
0.509055
0.026889
0.002130 0.292088 0.055350 0.000630
418
18
430
13
426
25
101
427
23
0.44
0.51
oc05a08
0.523152
0.025047 0.067676
0.001823 0.281340
427
17
422
11
562
27
75
423
20
0.09
0.77
oc05a09
0.513358
0.020086 0.067787 0.002072 0.390587 0.054950 0.000596
421
13
423
13
410
24
103
422
22
0.02
0.88
oc05a10
0.522726
0.019519
427
13
425
9
484
23
88
426
17
0.01
0.91
oc05a11
0.505994
0.029269 0.067669 0.002482 0.316994
0.055120 0.000627
416
20
422
15
417
25
101
420
27
0.09
0.76
oc05a12
3.091830
0.309787
0.241282 0.020244 0.418698
0.094036 0.001058
1431
77
1393
105
1509
21
92
1421
146
0.14
0.71
oc05a13
0.545644
0.022583 0.069703 0.002388 0.413939
0.054678 0.000614
442
15
434
14
399
25
109
438
25
0.24
0.62
oc05a14
1.684829
0.062498
0.169150
0.004190 0.333900 0.074155 0.000685
oc05a17
0.513790
0.076661
0.071798
0.004541 0.211955
oc05a18
0.513581
0.020029 0.066657
oc05a19
0.502867
0.027523 0.066927 0.002300 0.313907
oc05a20
0.506193
0.056117
0.069849 0.003536 0.228325 0.057125
oc05a21
0.528052
0.019065
oc05a22
0.539286
0.030986
au07a21
1.671426
0.095226
0.161885
0.009225 0.500120
au07a22
1.749453
0.056843
0.172250
0.004551 0.406603 0.073319
au07a24
0.554514
0.026321
0.071238
0.001771 0.261839
au07a25
0.563915
0.026494
0.071547
au07a26
0.536406
0.037290
0.069100
0.003145 0.327329 0.055453 0.001198
au07a27
2.587637
0.124658
0.223176 0.008282 0.385182
0.084270 0.000881
au07a30
0.577133
0.068436
0.071891 0.003246 0.190406
0.066559 0.002563
jl31a08
0.550349
0.030006
0.071382
0.002051 0.263516
jl31a09
2.075654
0.142654
0.193248
jl31a10
0.534177
0.045660 0.068309 0.003543 0.303413
jl31a12
2.095634
jl31a13
0.069017
0.068220
0.011616
0.310466
0.001590 0.255182
0.072518 0.000707
0.058871 0.000729
0.001523 0.299028 0.056802 0.000595
1003
24
1007
23
1046
19
96
1005
38
0.03
0.86
0.057111 0.000982
421
51
447
27
496
38
90
443
52
0.25
0.62
0.001952 0.375491 0.054036 0.000679
421
13
416
12
373
28
112
418
21
0.12
0.73
414
19
418
14
442
27
95
416
25
0.04
0.84
0.001064
416
38
435
21
496
41
88
432
40
0.25
0.62
0.068418
0.001635 0.330850 0.056972 0.000549
431
13
427
10
490
21
87
428
18
0.09
0.77
0.068107
0.003010 0.384647 0.056800 0.000734
438
20
425
18
484
29
88
430
32
0.38
0.54
Sample KSH-11-BUF continued:
0.055733 0.000686
206 526 0.393
139 1199 0.116
281 257 1.092
362 773 0.468
155 201 0.770
70 299 0.233
161 212 0.762
673 625 1.077
30 113 0.269
175 328 0.531
59 133 0.448
50
50 0.996
779 681 1.145
269 689 0.391
349 528 0.660
154 378 0.408
70 129 0.539
548 512 1.070
65 123 0.526
88 142 0.617
319 908 0.351
280 758 0.369
280 382 0.733
249 451 0.551
366 494 0.741
264 693 0.381
47 118 0.393
165 368 0.448
70 165 0.423
97 232 0.417
161 314 0.513
245 373 0.657
134 224 0.597
360 473 0.761
120 324 0.370
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
992
1026
445
447
432
1298
449
445
1140
428
1147
1000
396
436
407
443
1653
447
1318
425
427
427
423
422
426
420
1421
438
1005
443
418
416
432
428
430
71
38
20
21
34
64
38
23
80
39
77
109
48
18
47
36
69
24
68
35
26
23
20
22
17
27
146
25
38
52
21
25
40
18
32
oc05a23
0.505993
0.027954 0.068472 0.002428 0.320881 0.053942 0.000683
416
19
427
15
369
29
116
423
26
0.32
0.57
oc05a24
0.537568
0.024805 0.068536
437
16
427
11
528
28
81
430
21
0.31
0.58
oc05a25
0.574998
0.043661
0.073891 0.005060 0.450953 0.055196 0.000943
461
28
460
30
420
38
109
461
50
0.00
0.96
oc05a28
0.527983
0.034653
0.068531 0.003109 0.345645 0.056361 0.000696
430
23
427
19
467
27
92
428
34
0.02
0.90
oc05a29
0.539339
0.018987
0.069216
0.055610 0.000646
438
13
431
9
437
26
99
433
17
0.25
0.61
oc05a30
0.532839
0.048657 0.072949 0.003436 0.257926 0.055902 0.000999
434
32
454
21
448
40
101
449
38
0.37
0.54
oc05a31
0.540113
0.037518
0.070228
0.002817 0.288723
0.056171 0.000761
438
25
438
17
459
30
95
438
31
0.00
0.97
oc05a32
0.542246
0.056193
0.070003
0.004103 0.282769 0.056839 0.000787
440
37
436
25
485
31
90
437
46
0.01
0.92
oc05a33
0.587799
0.136991 0.073772
0.015513
0.055813 0.000809
469
88
459
93
445
32
103
465
154
0.01
0.91
oc05a34
0.531707
0.038838
0.069105 0.003322 0.329029 0.055039 0.000843
433
26
431
20
414
34
104
431
36
0.01
0.94
oc05a35
0.525229
0.022440 0.068027
0.001926
0.000616
429
15
424
12
413
25
103
426
21
0.08
0.78
oc05a38
0.594080
0.023733 0.075247
0.002431 0.404339 0.059274 0.000760
473
15
468
15
577
28
81
470
25
0.13
0.72
oc05a39
3.935500
0.148298
0.001120
1621
31
1622
28
1710
20
95
1621
46
0.00
0.99
oc05a40
0.549509
0.039834 0.070589 0.002705 0.264274 0.059092 0.001280
445
26
440
16
570
47
77
441
31
0.03
0.85
oc05a41
0.511225
0.033512
0.055012 0.000659
419
23
422
18
413
27
102
421
32
0.01
0.90
oc05a42
0.529212
0.043574 0.070606
0.002021 0.173801 0.056353 0.001177
431
29
440
12
466
46
94
439
24
0.08
0.77
oc05a43
0.535532
0.015878
0.001364 0.335240 0.056170 0.000555
435
10
428
8
459
22
93
430
15
0.49
0.49
oc05a44
0.630487
0.078499 0.075204 0.007685 0.410390
0.058793 0.000736
496
49
467
46
559
27
84
480
80
0.31
0.58
oc05a45
0.516602
0.059246
0.071280
0.055829 0.001056
423
40
444
22
446
42
100
440
41
0.27
0.60
oc05a46
3.082819
0.180169
0.243884 0.009950 0.349044 0.091658
0.001029
1428
45
1407
52
1460
21
96
1420
79
0.15
0.70
oc05a49
0.573025
0.044879
0.071687 0.004580 0.407863 0.055768 0.000662
460
29
446
28
443
26
101
452
47
0.20
0.66
oc05a50
0.572330
0.062895
0.073551 0.005605 0.346710
0.054857 0.000665
460
41
458
34
406
27
113
458
60
0.00
0.96
oc05a51
0.549938
0.126948
0.075867 0.007354 0.209949
0.056711 0.001007
445
83
471
44
480
39
98
467
84
0.10
0.76
oc05a52
1.801910
0.078916
0.176171
0.004661 0.302038 0.074832 0.000931
1046
29
1046
26
1064
25
98
1046
43
0.00
1.00
oc05a53
2.147376
0.171179
0.197827
0.011771 0.373202 0.078003 0.000871
1164
55
1164
63
1147
22
101
1164
97
0.00
0.99
oc05a55
0.566490
0.098140
0.074273 0.006689 0.259933 0.058064 0.001237
456
64
462
40
532
47
87
460
75
0.01
0.93
oc05a56
0.553132
0.026029 0.070674
447
17
440
11
463
27
95
442
21
0.15
0.70
oc05a57
3.117519
0.103315
0.247198 0.005983 0.365172
0.090701 0.000691
1437
25
1424
31
1440
15
99
1432
46
0.16
0.69
oc05a60
0.530942
0.020350
0.068610
0.001509 0.286879 0.056726 0.000607
432
13
428
9
481
24
89
429
17
0.11
0.74
au01a24
0.522590
0.020248
0.061855 0.002366 0.493609 0.057575 0.000602
427
14
387
14
514
23
75
409
24
8.06
0 .0 0
au01a27
1.060768
0.217873
0.074469 0.004052 0.132463
734
107
463
24
1780
79
26
465
49
4.99
0 .0 3
au01a29
0.934849
0.183814
0.066385 0.002230 0.085426 0.154608
0.008213
670
96
414
13
2398
90
17
415
27
5.53
0 .0 2
au07a12
0.540332
0.050033 0.066283 0.002704 0.220322 0.066165
0.001345
439
33
414
16
812
43
51
417
32
0.55
0 .4 6
au07a23
0.481704
0.035722 0.054958
0.072796 0.002077
399
24
345
24
1008
58
34
370
42
4.79
0 .0 3
0.001852 0.292798 0.057952 0.000747
0.001518
0.311583
0.451142
0.331311
0.055018
0.286001 0.005593 0.259463 0.104726
0.067672 0.002947 0.332166
0.068618
0.003615
0.221134
0.001861 0.279850 0.056268 0.000697
0.003931 0.482318
Sample KSH-11-BUF con tinued:
0.108805 0.004692
182
233
88
166
241
119
237
245
143
123
194
199
43
67
186
340
273
225
169
36
213
401
125
37
39
91
242
52
232
322
316
199
376
371
181
424
306
256
277
349
433
117
121
417
492
496
424
184
120
388
644
195
169
136
137
388
223
386
0.564
0.738
0.444
0.441
0.650
0.660
0.560
0.800
0.559
0.443
0.556
0.460
0.372
0.551
0.446
0.691
0.550
0.532
0.921
0.302
0.549
0.623
0.637
0.220
0.286
0.660
0.625
0.232
0.601
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
2434
745
576
686
1106
1406
475
451
642
586
1.732
1.569
1.279
1.068
1.888
not used
not used
not used
not used
not used
423
430
461
428
433
449
438
437
465
431
426
470
1621
441
421
439
430
480
440
1420
452
458
467
1046
1164
460
442
1432
429
26
21
50
34
17
38
31
46
154
36
21
25
46
31
32
24
15
80
41
79
47
60
84
43
97
75
21
46
17
jl31a11
0.596870
jl31a14
0.607971 0.059585
0.082130
0.064682 0.001715
475
52
436
22
764
56
57
439
42
0.55
0 .4 6
0.070381 0.004593 0.332921 0.059239 0.001431
482
38
438
28
576
53
76
450
51
1.26
0 .2 6
0.069929
0.003591 0.186598
jl31a22
0.610284
0.068839 0.068346 0.004492
0.291316
0.065952 0.002386
484
43
426
27
805
76
53
437
52
1.65
0 .2 0
jl31a23
0.573042
0.033218
0.066784 0.002463
0.318122
0.056911 0.001231
460
21
417
15
488
48
85
427
28
3.82
0 .0 5
jl31a29
0.585827
0.029400
0.068192
0.001779 0.259862 0.059050 0.001153
468
19
425
11
569
42
75
432
21
4.91 0 .0 3
jl31a30
0.443466
0.061372
0.051297
0.004321 0.304320 0.062310
0.001259
373
43
322
26
685
43
47
331
51
1.31
0 .2 5
jl31a32
0.524970
0.043664
0.062341 0.002645 0.255019
0.060931 0.000899
428
29
390
16
637
32
61
396
31
1.68
0 .2 0
oc05a06
1.312218
0.082080
0.152709 0.004686 0.245278 0.065695 0.000838
851
36
916
26
797
27
115
895
46
2.86
0 .0 9
oc05a54
0.548729
0.022637 0.067466
444
15
421
11
551
25
76
428
21
2.28
0 .13
Sample KSH-12-70:
0.001866 0.335250 0.058564 0.000673
464
394
80
288
367
1216
655
44
186
622
545
160
574
752
1104
1345
149
376
0.747
0.723
0.500
0.502
0.488
1.101
0.487
0.292
0.495
not used
not used
not used
not used
not used
not used
not used
not used
not used
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
±1σ
Rho
Pb
206
Pb
207
±1σ
Pb ±1σ
235
U (Ma)
206
Pb ±1σ
238
U (Ma)
207
206
Pb ±1σ U/Pb Concordia M SWD P ro b. 232 Th 238 U
Pb (Ma) Pb/Pb age ±2σ (Ma)(of concordance)
(ppm) (ppm) Th/U
(a)
(b)
86
471
(c)
Age used Age ±2σ (Ma)
(d)
(e)
Sample KSH-12-70 (38.48899°N, 77.419183°W)
mr19a50
0.634075
0.046627 0.074200
0.003519 0.322454 0.058196
0.001088
499
29
461
21
537
41
39
1.53
0 .2 2
mr19a40
0.528373
0.072556 0.076247 0.003778 0.180395
0.001902
431
48
474
23
459
75
103
468
43
0.78
mr20b20
0.570325
0.040580 0.076867 0.002579 0.235742 0.057077 0.001581
458
26
477
15
495
61
97
474
29
0.51 0 .4 8
mr19a60
0.637097
0.065335 0.076040 0.003473 0.222667 0.060814
0.001626
501
41
472
21
633
58
75
476
40
0.45
mr19a24
0.624680
0.036586 0.076806
0.002129 0.236593 0.058824 0.000559
mr19a34
0.651147
0.073591 0.077043 0.004024 0.231085
mr19a51
0.637177
mr19a77
0.056176
493
23
477
13
561
21
85
480
24
0.45
0.062630 0.001778
509
45
478
24
696
61
69
483
46
0.44
0.100893
0.073781 0.005770 0.246941 0.064439 0.002213
501
63
459
35
756
72
61
465
66
0.42
0.633363
0.048713
0.077077 0.003607 0.304197
0.059571 0.001701
498
30
479
22
588
62
81
484
40
0.38
mr20b16
0.630677
0.038173
0.077565
0.002180 0.232205 0.059081 0.001180
497
24
482
13
570
43
84
484
25
0.37
mr19a80
0.571519
0.058035 0.077578 0.004397 0.279060 0.056704 0.001258
459
37
482
26
480
49
100
475
48
0.34
mr19a25
0.718748
0.099228 0.083722 0.005638 0.243896 0.067803 0.002416
550
59
518
34
863
74
60
524
64
0.27
mr19a42
0.618629
0.073746 0.074837
0.004134 0.231704
0.001793
489
46
465
25
560
66
83
469
47
0.25
mr19a28
0.617809
0.029265
0.002124 0.290665 0.057681 0.000596
488
18
479
13
518
23
93
481
23
0.25
mr19a65
0.613216
0.053633 0.075305 0.004307 0.327002 0.063200 0.001325
486
34
468
26
715
45
65
473
47
0.25
mr19a62
0.528489
0.041372
0.071464 0.003432 0.306751 0.056275 0.001478
431
27
445
21
463
58
96
441
37
0.24
mr20b23
0.653711
0.064105
0.079161 0.003939 0.253698 0.059953 0.001747
511
39
491
24
602
63
82
495
44
0.23
mr20b22
0.775393
0.431325
0.073740 0.020596 0.251050
583
247
459
124
1169
76
39
470
242
0.23
mr19a67
0.622344
0.044447 0.076996
0.002901 0.263802 0.061805
0.001439
491
28
478
17
667
50
72
481
33
0.21
mr19a79
0.574322
0.047850 0.076487
0.003154 0.247476 0.055860 0.001416
461
31
475
19
447
56
106
472
35
0.20
mr19a78
0.549641 0.074474 0.075096 0.005399 0.265282 0.058757 0.001934
445
49
467
32
558
72
84
461
60
0.19
mr19a73
0.527531 0.086582 0.072705
0.001811
430
58
452
27
508
69
89
450
51
0.15
mr19a23
0.633814
0.092374 0.076750 0.006679 0.298543 0.061609 0.002465
498
57
477
40
661
86
72
482
74
0.13
mr20b18
0.606555
0.043259 0.076009 0.003439 0.317244
0.056824 0.001454
481
27
472
21
485
57
97
475
37
0.10
mr19a75
0.595068
0.159424
0.067005 0.002708
474
101
506
43
838
84
60
502
83
0.10
mr20b06
0.581078
0.055431 0.076658 0.003978 0.271995
0.057710
0.001842
465
36
476
24
519
70
92
473
44
0.09
mr20b11
0.596921 0.056105
0.054752 0.001184
475
36
486
19
402
48
121
484
36
0.08
mr19a74
0.617798
0.059901 0.076976
0.003061 0.205095 0.062430 0.001835
488
38
478
18
689
63
69
479
35
0.07
mr19a20
0.556144
0.076558 0.074388 0.004400 0.214863
0.058162
0.001538
449
50
463
26
536
58
86
460
50
0.07
mr19a16
0.612983
0.050182
0.076766 0.003923
0.312142
0.056558 0.000697
485
32
477
23
474
27
101
479
43
0.07
mr19a64
0.567677
0.193913
0.068471 0.004288 0.091659
0.073710 0.004226
457
126
427
26
1034
116
41
428
51
0.05
0.077126
0.004412 0.184865
0.081590 0.007204 0.164783
0.078285
0.003169 0.215367
Sample KSH-12-70 continued:
0.058817
0.078856 0.003024
0.057438
0 .3 8
276
51
80
0.50
103
0.50
612
0.51 106
0.52
82
0.54
69
0.54
41
0.56
221
0.60
50
0.62
61
0.62 1023
0.62
337
0.62
134
0.63
76
0.63
99
0.65
104
0.65
74
0.66
67
0.70
119
0.72
91
0.75
99
0.76
39
0.77
50
0.77
204
0.79
88
0.79
49
0.79
940
0.82
123
0.869
206
Pb/238 U
461
42
83
0.616
206
Pb/238 U
474
45
111
143
1944
145
79
110
315
245
72
146
1042
337
160
119
88
142
111
117
130
135
140
66
80
240
118
98
961
111
0.722
0.723
0.315
0.729
1.042
0.627
0.130
0.901
0.700
0.419
0.982
0.998
0.837
0.639
1.131
0.731
0.665
0.576
0.910
0.672
0.712
0.580
0.632
0.850
0.745
0.498
0.977
1.111
206
Pb/238 U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
477
476
480
483
465
484
484
475
524
469
481
473
441
495
470
481
472
461
450
482
475
502
473
484
479
460
479
428
31
40
24
46
66
40
25
48
64
47
23
47
37
44
242
33
35
60
51
74
37
83
44
36
35
50
43
51
318
mr19a81
1.903749
0.102262
0.076476 0.000842
1082
36
1092
43
1108
22
99
1086
65
0.05
0.82
mr19a29
0.595079
0.056268 0.077423 0.004236 0.289327 0.054560 0.001260
474
36
481
25
394
52
122
479
46
0.03
0.86
mr19a10
0.613643
0.043595 0.079000
0.003159
0.054853 0.001035
486
27
490
19
406
42
121
489
35
0.02
0.88
mr19a36
0.579739
0.072921 0.073998
0.004713 0.253163
0.055518
0.001876
464
47
460
28
433
75
106
461
53
0.01
0.93
mr19a76
0.575181
0.045251 0.074467 0.003036 0.259134
0.055514
0.001302
461
29
463
18
433
52
107
463
34
0.00
0.96
mr19a21
0.611130
0.081237
0.078412 0.003970 0.190422
0.058142
0.001769
484
51
487
24
535
67
91
486
46
0.00
0.96
mr19a13
0.575465
0.060870
0.074176 0.005325 0.339381 0.054747 0.001326
462
39
461
32
402
54
115
461
57
0.00
0.99
mr20b10
0.608408
0.207026 0.077657 0.007003
0.065938 0.002841
483
131
482
42
804
90
60
482
82
0.00
1.00
mr19a68
0.586871 0.062122
0.052249
0.006251 0.565078 0.085261 0.003644
469
40
328
38
1321
83
25
379
71
14.24 0 .0 0
mr19a27
0.610718
0.046082
0.061828
0.005091 0.545656 0.067596 0.001080
484
29
387
31
856
33
45
437
54
11.37 0 .0 0
mr20b21
0.931075
0.100433
0.078736 0.003226 0.189904
0.084153 0.003585
668
53
489
19
1296
83
38
496
38
9.94
0 .0 0
mr19a61
0.476131
0.064978
0.042147 0.005654 0.491485
0.087149
0.002217
395
45
266
35
1364
49
20
291
68
9.22
0 .0 0
mr20b12
2.288122
0.141538
0.179816
0.086148 0.000782
1209
44
1066
44
1342
18
79
1130
75
8.02
0 .0 0
mr20b13
0.740338
0.068727
0.071596 0.004052 0.304845 0.072332 0.001998
563
40
446
24
995
56
45
463
47
7.85
0 .0 1
mr19a14
0.693983
0.086062 0.062077 0.005628 0.365545 0.076589 0.002469
535
52
388
34
1111
64
35
410
66
7.72
0 .0 1
mr20b14
0.722805
0.105282
552
62
403
88
1574
64
26
568
122
7.21
0 .0 1
mr19a63
0.382078
0.057988 0.070473 0.003330 0.155690
0.048045 0.002094
329
43
439
20
101
103
433
421
38
6.76
0 .0 1
mr19a12
0.814243
0.094362
0.080451 0.002625
605
53
473
23
1208
64
39
482
45
5.59
0 .0 2
mr19a09
0.718182
0.056759 0.075976 0.003904 0.325104
0.064134
0.001474
550
34
472
23
746
49
63
489
44
4.95
0 .0 3
mr20b07
0.647332
0.046251
0.071425 0.002847 0.278978 0.064378 0.001493
507
29
445
17
754
49
59
455
33
4.44
0 .0 4
mr20b19
0.630879
0.059675 0.067500
0.479082 0.072724 0.002493
497
37
421
37
1006
70
42
456
65
3.92
0 .0 5
mr20b24
0.656664
0.074080 0.067540 0.005478 0.359481 0.072343 0.002177
513
45
421
33
996
61
42
442
62
3.82
0 .0 5
mr19a37
1.895697
0.246837
0.148913
0.014836 0.382584 0.087544 0.001414
1080
87
895
83
1372
31
65
966
147
3.63
0 .0 6
mr19a08
0.671474
0.059154
0.073233
0.004144 0.321202
0.064054
0.001711
522
36
456
25
743
56
61
470
47
3.14
0 .0 8
mr19a26
0.713636
0.095119
0.071426
0.004981 0.261620
0.073071 0.002384
547
56
445
30
1016
66
44
457
58
3.03
0 .0 8
mr20b08
1.023466
0.230059
0.080813 0.004822 0.132735
0.106121 0.004260
716
115
501
29
1734
74
29
504
57
2.85
0 .0 9
mr19a49
0.667742
0.056035
0.074717 0.003349 0.267075 0.064527 0.001899
519
34
465
20
759
62
61
474
38
2.41
0 .12
mr19a54
0.607163
0.041029
0.071152
482
26
443
14
689
40
64
449
28
2.10
0 .15
mr19a11
0.755050
0.088891 0.079650 0.003700 0.197309
0.065996 0.002144
571
51
494
22
806
68
61
500
43
2.08
0 .15
mr20b17
0.787224
0.141621
0.082218 0.003724
590
80
479
23
1251
89
38
482
45
1.72
0 .19
mr19a22
0.667166
0.070943 0.074804 0.003878 0.243777 0.064494 0.001862
519
43
465
23
758
61
61
473
45
1.46
0 .2 3
0.184635 0.007907 0.398617
0.064583
0.008035
0.281416
0.132516
0.361177
0.014550 0.773365 0.097360 0.003341
0.076134 0.003779
0.006118
0.214157
0.002393 0.248841 0.062439 0.001177
0.077058 0.003763 0.135737
mr20b15
0.666441 0.071005
0.074775 0.005036 0.316057
0.001966
519
43
465
30
665
68
70
477
57
1.43
0 .2 3
mr19a35
0.650369
0.072149
0.073038
0.003711 0.229032 0.059537 0.001756
509
44
454
22
587
64
77
461
43
1.40
0 .2 4
mr19a38
0.720922
0.100956
0.077165
0.004619 0.213743
551
60
479
28
854
91
56
486
54
1.36
0 .2 4
Sample KSH-12-70 continued:
0.061727
0.067510 0.002964
115
95
209
51
91
92
225
47
412
132
230
90
134
106
247
79
0.280
0.722
0.910
0.569
0.679
0.874
0.910
0.596
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
149
962
73
884
177
85
79
417
69
78
84
113
92
88
46
114
86
112
74
1272
58
94
66
65
75
113
188
575
100
383
712
112
118
149
80
104
122
161
95
118
195
155
103
141
109
870
79
118
104
100
122
131
0.790
1.672
0.731
2.309
0.248
0.766
0.669
2.805
0.857
0.750
0.687
0.702
0.965
0.742
0.238
0.739
0.833
0.799
0.684
1.462
0.732
0.793
0.640
0.649
0.619
0.860
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
1086
479
489
461
463
486
461
482
65
46
35
53
34
46
57
82
mr19a48
0.596258
0.034623
0.072128
mr19a55
0.632711
0.051838
0.074169 0.002699 0.222066 0.061507
mr19a66
0.631186
0.032907 0.076654
0.002631 0.329153
mr19a41
0.514438
0.058002 0.073096
0.003173
mr19a47
0.600734
0.055740
0.071979 0.002403
mr19a15
0.704623
mr19a39
mr20b09
mr19a53
475
22
449
15
577
31
78
455
27
1.29
0 .2 6
0.001223
498
32
461
16
657
43
70
466
31
1.22
0 .2 7
0.002419 0.288750 0.059281 0.000838
0.001204
497
20
476
16
645
42
74
482
29
0.93
0 .3 3
0.192491 0.054278 0.001844
421
39
455
19
383
76
119
450
36
0.72
0 .4 0
0.179916
0.064565 0.001748
478
35
448
14
760
57
59
451
28
0.67
0 .4 1
0.126910
0.077323 0.004988 0.179095
0.071751 0.002872
542
76
480
30
979
82
49
485
59
0.62
0 .4 3
0.601904
0.067683
0.071319
0.005422 0.338058 0.054537 0.001903
478
43
444
33
393
78
113
454
60
0.59
0 .4 4
0.629411
0.059394
0.075167 0.004452 0.313855
0.059941 0.001463
496
37
467
27
601
53
78
475
49
0.55
0 .4 6
0.666588
0.074350
0.078122 0.003750
0.063672 0.002278
519
45
485
22
731
76
66
489
43
0.52
0 .4 7
Sample BREMO:
0.215174
0.061153
921
425
140
68
121
93
68
112
76
881
446
515
95
178
87
101
160
101
1.046
0.953
0.272
0.716
0.677
1.062
0.670
0.698
0.757
not used
not used
not used
not used
not used
not used
not used
not used
not used
Measured Isotopic Ratios
207
file ID
Pb
235
U
206
±1σ
Pb
238
U
Calculated Ages
207
±1σ
Rho
Pb
206
Pb
207
±1σ
Pb ±1σ
235
U (Ma)
206
Pb ±1σ
238
U (Ma)
207
206
Pb ±1σ U/Pb Concordia M SWD P ro b. 232 Th 238 U
Pb (Ma) Pb/Pb age ±2σ (Ma)(of concordance)
(ppm) (ppm) Th/U
(a)
(b)
(c)
Age used Age ±2σ (Ma)
(d)
(e)
Sample BREMO (37.71290°N, 78.30061°W)
my09A11
0.625898
0.022482
0.077514 0.002026 0.363770 0.057096 0.000400
494
14
481
12
495
15
97
486
21
0.68
0 .4 1
my09A12
0.591175
0.012606
0.075213
0.001334 0.415945
0.056062 0.000224
472
8
467
8
455
9
103
470
14
0.23
0.63
my09A13
0.592732
0.021542
0.074730
0.001750 0.322215
0.057205 0.000413
473
14
465
10
499
16
93
467
19
0.31
my09A15
1.744338
0.025926
0.170023 0.002238 0.442819
0.072543 0.000399
1025
10
1012
12
1001
11
101
1021
18
1.18
0 .2 8
my09A19
2.735771 0.071783
0.230732 0.004404 0.363732 0.085882 0.000436
1338
20
1338
23
1336
10
100
1338
35
0.00
1.00
my09A21
1.539700
0.244760
0.163281
0.012235 0.235685 0.073926 0.000655
946
98
975
68
1039
18
94
967
122
0.08
0.78
my09A23
2.328390
0.027863
0.199170
0.002631 0.551899
1221
9
1171
14
1216
9
96
1219
17
18.13
0 .0 0
0.080779 0.000371
0.58
my09A24
2.034090
0.040076
0.177237 0.002937 0.420505
0.081163 0.000358
1127
13
1052
16
1225
9
86
1099
25
my09A27
3.683219
0.124107
0.266451 0.009763 0.543713
0.096959 0.000331
1568
27
1523
50
1566
6
97
1568
54
1.17
0 .2 8
my09A28
2.735500
0.079381 0.233928 0.004759 0.350529 0.086309 0.000399
1338
22
1355
25
1345
9
101
1345
38
0.40
0.52
my09A32
1.799174
0.057263
1045
21
1062
17
1079
18
98
1056
30
0.55
0 .4 6
my09A33
2.207794
0.035810
0.179116
0.003160 0.277150
0.197559 0.002704 0.421990
0.075408 0.000692
0.078962 0.000303
1184
11
1162
15
1171
8
99
1177
21
21.84 0 .0 0
2.26
0 .13
25
35
122
433
0.464
206
Pb/238 U
1171
28
Pb/238 U
1052
32
201
142
339
0.417
206
165
108
426
411
0.388
0.262
206
Pb/238 U
concordia
1523
1345
99
38
21
38
0.558
206
Pb/238 U
1062
35
0.992
206
Pb/238 U
1162
29
185
187
85
340
231
0.479
0.605
0.428
206
0.83
41
206
99
Pb/238 U
concordia
concordia
1088
1125
476
30
31
24
0 .0 4
111
449
0.248
206
Pb/238 U
1087
29
Pb/238 U
1154
30
Pb/238 U
1053
61
966
32
987
22
98
998
42
1.76
8
1226
13
1218
14
101
1226
17
0.00
my09A37
2.447632
0.037136
0.474101 0.081752 0.000238
1257
11
1258
16
1240
6
101
1257
21
0.00
my09A38
3.169156
0.038311 0.252482 0.002883 0.472228 0.090713 0.000328
1450
9
1451
15
1441
7
101
1450
18
0.01
my09A43
2.473884
0.091472
1264
27
1277
32
1303
11
98
1269
48
0.15
my09A46
4.207977
0.049705 0.296208 0.003636 0.519545
0.102134 0.000252
1676
10
1672
18
1663
5
101
1676
19
0.04
my09A47
0.556894
0.010846
0.072733
0.001055 0.372293 0.056544 0.000266
450
7
453
6
474
10
96
451
11
0.17
my09A51
1.636013
0.026455
0.163557
0.001998 0.377648 0.073137 0.000359
984
10
977
11
1018
10
96
981
18
0.42
my09A52
0.575909
0.024409 0.076047
0.057288 0.000469
462
16
472
8
503
18
94
471
16
0.44
my09A55
1.872761
0.032679
0.183941 0.002726 0.424697 0.074793 0.000537
1072
12
1088
15
1063
14
102
1076
21
1.38
0 .2 4
my09A58
2.033255
0.047712
0.189729 0.004092 0.459601 0.077293 0.000308
1127
16
1120
22
1129
8
99
1125
31
0.11
0.74
my09A62
0.599295
0.019960
0.076256 0.002600
0.056831 0.000612
477
13
474
16
485
24
98
476
24
0.05
my09A64
2.000752
0.034761
0.183646 0.002666 0.417770
0.079113
1116
12
1087
15
1175
8
93
1106
22
4.04
0.000331
1012
1338
967
64
17
21
18
48
19
11
18
16
21
1226
0.511916
Pb/238 U
concordia
concordia
966
1226
1257
1450
1269
1676
451
981
471
1003
0.080843 0.000574
0.217317
206
Pb/ U
concordia
concordia
concordia
concordia
concordia
concordia
concordia
concordia
0.072055 0.000775
0.001401
0.328
0.382
0.234
0.873
1.095
0.136
0.431
0.485
0.443
0.328
0.464
1.028
0.005793 0.532816
0.027430 0.209489 0.002526 0.515495
0.006105 0.376690 0.084469 0.000460
162
233
169
53
89
39
50
608
632
178
125
454
621
126
485
0.056637
2.345505
0.219161
24
14
19
1129
Pb/238 U
concordia
concordia
44
666
0.94
86
0.90
77
0.70
61
0.84 201
0.68 203
0.52
58
0.51 498
1.684626
my09A36
0.215446 0.003099
481
470
467
412
206
my09A34
0.161700
206
400
0.573
0.430
0.528
236
485
211
0 .18
0.99
238
my09A65
2.235572
0.044761
0.196006 0.002788 0.355202 0.082966 0.000459
1192
14
1154
15
1268
11
91
1175
24
5.38
0 .0 2
61
95
0.644
206
my09A66
1.886125
0.075148
0.177483 0.005567 0.393639 0.076709 0.000305
1076
26
1053
30
1114
8
95
1067
47
0.53
0 .4 7
66
399
0.166
206
my09A67
1.689464
0.028764
0.164289 0.002645 0.472841 0.072784 0.000271
1005
11
981
15
1008
8
97
999
21
3.17
0 .0 8
2.710733
0.044781 0.229053 0.002858 0.377624 0.084699 0.000380
1331
12
1330
15
1309
9
102
1331
22
0.01
0.90
349
117
0.323
0.442
206
my09A68
113
52
Pb/238 U
concordia
981
1331
29
22
my09A74
1.679605
0.034300
1001
13
1026
11
1010
11
102
1015
19
2.93
0 .0 9
43
177
0.241
206
1026
23
0.172453 0.002058 0.292222 0.072847 0.000393
Sample BREMO continued:
Pb/238 U
my09A76
1.691442
0.049086
0.174166
0.069844 0.000842
1005
19
1035
23
924
25
112
1015
34
1.71
my09A77
1.786150
0.095985
0.175262 0.008439 0.448035 0.074476 0.000502
1040
35
1041
46
1054
14
99
1041
66
0.00
my09A79
2.334409
0.064526 0.209473 0.004098 0.353846 0.081897 0.000564
1223
20
1226
22
1243
13
99
1224
34
0.02
my09A80
2.337706
0.047037
1224
14
1242
18
1256
15
99
1230
26
1.04
0.212485
0.004154 0.410952
0.003311 0.387166
0.082451 0.000625
28
91
215
0.748
0.264
0.277
206
0.89
21
24
60
Pb/238 U
concordia
concordia
1035
1041
1224
46
66
34
0 .3 1
27
45
0.607
206
Pb/238 U
1242
35
Pb/238 U
1173
49
Pb/238 U
1123
41
0 .19
0.99
my09A81
2.087738
0.056526
0.199569
0.077245 0.000395
1145
19
1173
24
1128
10
104
1152
35
1.42
0 .2 3
37
155
0.236
206
my09A82
1.933194
0.044435
0.190253 0.003746 0.428270 0.073234 0.000386
1093
15
1123
20
1020
11
110
1101
29
2.38
0 .12
47
162
0.291
206
my09A83
1.893051
0.036362
0.185994 0.002286 0.319946
0.075264 0.000516
1079
13
1100
12
1076
14
102
1089
20
2.05
0 .15
2.247406
0.049585
0.204411
0.003181 0.352684 0.079977 0.000354
1196
16
1199
17
1196
9
100
1197
27
0.03
0.87
my09A85
0.616761
0.015343
0.077900
0.001114
0.287353 0.058726 0.000433
488
10
484
7
557
16
87
485
12
0.18
0.67
my09A89
2.581151
0.035401
0.221640
0.002718 0.447005 0.084752 0.000361
1295
10
1291
14
1310
8
99
1294
19
0.13
0.72
my09A92
2.146009
0.031295
0.197164
0.002721 0.473183
0.077477 0.000270
1164
10
1160
15
1133
7
102
1163
20
0.08
0.78
80
279
226
182
399
1.141
0.361
0.537
0.483
0.165
206
my09A84
91
101
122
88
66
Pb/238 U
concordia
concordia
concordia
concordia
1100
1197
485
1294
1163
25
27
12
19
20
my09A93
1.740684
0.053992
0.164639 0.004805 0.470451 0.078280 0.000666
1024
20
983
27
1154
17
85
1013
38
2.80
0 .0 9
1.712712
0.021333
0.169776
0.001974 0.466764 0.072220 0.000274
1013
8
1011
11
992
8
102
1013
15
0.06
my09A96
3.544497
0.071646
0.267907 0.004858 0.448505 0.095540 0.000364
1537
16
1530
25
1539
7
99
1536
31
0.10
66
256
264
0.319
0.353
0.389
206
my09A94
21
0.81
90
0.76 103
Pb/238 U
concordia
concordia
983
1013
1536
53
15
31
my09A101
1.859861
0.032021
0.174071
0.076348 0.000592
1067
11
1035
12
1104
16
94
1051
19
6.13
0 .0 1
2.840537
0.037712
0.235173 0.002702 0.432659 0.086669 0.000371
1366
10
1362
14
1353
8
101
1365
19
0.13
0.72
47
106
67
215
0.701
0.492
206
my09A102
Pb/238 U
concordia
1035
1365
23
19
my09A103
3.611992
0.041192
0.268322 0.003260 0.532681 0.107804
1552
9
1532
17
1763
156
87
1552
18
2.02
425
471
0.903
206
1532
33
0.004551 0.421140
0.002107 0.351482
0.009199
0 .16
61
164
39
71
154
847
100
330
0.393
0.193
0.389
0.214
Pb/ U
concordia
concordia
concordia
1002
419
1027
1060
53
94
23
21
29
0.91 663
127
596
0.227
1.114
206
Pb/238 U
concordia
1014
415
28
34
16
0.62 581
0.71 152
56
846
428
0.286
0.687
0.355
206
Pb/238 U
concordia
concordia
1005
439
965
25
21
17
23
43
0.531
206
Pb/238 U
1213
29
Pb/238 U
1012
25
Pb/238 U
concordia
my09A104
1.741851
0.046899
0.168219
0.004813 0.531343
0.072994 0.000413
1024
17
1002
27
1014
11
99
1022
34
0.93
0 .3 4
my09A106
0.505320
0.071925
0.063376
0.013451 0.745582 0.055595 0.000336
415
49
396
82
436
13
91
419
94
0.12
0.73
my09A107
1.740913
0.041856
0.172973 0.002429 0.292050 0.074671 0.000482
1024
16
1028
13
1060
13
97
1027
23
0.07
0.79
my09A108
1.850259
0.034871
0.177943 0.002337 0.348409 0.075284 0.000299
1064
12
1056
13
1076
8
98
1060
21
0.29
0.59
my09A111
1.786944
0.029341
0.170293 0.002557 0.457284 0.072418 0.000367
1041
11
1014
14
998
10
102
1034
20
4.16
0 .0 4
my09A112
0.511093
0.056608 0.066459 0.002955 0.200691 0.059597 0.000609
419
38
415
18
589
22
70
415
34
0.01
my09A113
1.630872
0.040324
0.168662 0.002224 0.266706 0.072452 0.000538
982
16
1005
12
999
15
101
997
21
1.76
my09A114
0.546314
0.020023
0.069911
0.002041 0.398207 0.056394 0.000241
443
13
436
12
468
9
93
439
21
0.25
my09A115
1.591200
0.023807
0.161038
0.002122 0.440322 0.069848 0.000230
967
9
963
12
924
7
104
965
17
0.14
my09A116
2.254225
0.044022 0.206960 0.002709 0.335090 0.079439 0.000579
1198
14
1213
14
1183
14
102
1205
23
0.80
0 .18
0 .3 7
62
270
0.227
32
0.91 304
76
402
0.427
0.756
206
1165
464
42
10
307
0.61 131
891
232
0.344
0.563
206
Pb/238 U
concordia
437
443
16
19
32
159
0.198
206
Pb/238 U
950
27
0.362
206
Pb/238 U
992
18
0.338
206
999
42
1.743861
0.027254
0.169912
0.002241 0.421890
0.072749 0.000284
1025
10
1012
12
1007
8
100
1020
19
1.18
my09A122
2.050612
0.108637
0.197996
0.003931 0.187403
0.077956 0.000529
1132
36
1165
21
1146
13
102
1158
39
0.71 0 .4 0
my09A123
0.580532
0.012180
0.074607 0.000877 0.280076 0.056655 0.000325
465
8
464
5
478
13
97
464
10
0.01
my09A124
0.551230
0.011624
0.070121
0.001326 0.448290
0.055101 0.000205
446
8
437
8
416
8
105
442
13
1.18
my09A125
0.556946
0.024619
0.070815
0.001635
0.261128
0.057932 0.000522
450
16
441
10
527
20
84
443
19
0.26
my09A126
1.594779
0.031758
0.158748
0.002411
0.381391 0.073072 0.000400
968
12
950
13
1016
11
93
960
21
1.62
my09A132
1.685763
1.716047
0.029673
0.051056
0.166275
0.001618
0.276375 0.074669 0.000528
0.167543 0.003832 0.384391 0.072345 0.000338
Sample BREMO continued:
1003
1015
11
19
992
999
9
21
1060
996
14
10
94
100
996
1008
16
33
0.89
238
206
my09A117
my09A128
Pb/238 U
206
0 .2 8
0 .2 8
0 .2 0
0 .3 4
0.51 0 .4 8
23
63
64
187
238
Pb/
U
my09A133
1.692365
0.025584
0.166624
0.001763 0.349959 0.072850 0.000401
1006
10
993
10
1010
11
98
1000
16
1.21
0 .2 7
26
98
0.265
206
Pb/238 U
993
19
Pb/238 U
1414
41
0.092249 0.000348
1453
14
1414
20
1473
7
96
1444
28
4.13
0 .0 4
107
181
0.591
206
0.042544
0.172000 0.002389 0.270651 0.071878 0.000633
993
16
1023
13
982
18
104
1012
23
2.92
0 .0 9
0.038482
0.167770 0.002243 0.290803 0.071907 0.000735
999
15
1000
12
983
21
102
999
21
0.00
0.95
my09A137
1.744004
0.056763
0.173095
0.003614 0.320756 0.073952 0.000705
1025
21
1029
20
1040
19
99
1027
33
0.03
0.86
my09A141
1.664974
0.057541
0.169158
0.003176 0.271598
0.072610 0.000437
995
22
1007
18
1003
12
100
1003
31
0.26
39
35
84
139
1.001
0.347
0.502
0.319
206
1.674374
39
12
42
44
Pb/238 U
concordia
concordia
concordia
1023
999
1027
1003
26
21
33
31
my09A142
1.557522
0.045690
0.154149
0.004234 0.468139
0.072419 0.000348
953
18
924
24
998
10
93
946
35
1.77
1.595952
0.027306
0.161514
0.002248 0.406792 0.072233 0.000285
969
11
965
12
993
8
97
967
19
0.07
my09A144
2.995008
0.068349 0.243675 0.003892 0.349925 0.090531 0.000480
1406
17
1406
20
1437
10
98
1406
31
0.00
0.98
193
405
126
0.375
0.180
0.373
206
my09A143
72
73
47
924
967
1406
47
19
31
my09A145
0.594193
0.009453
0.073411
0.001010
0.432363 0.056455 0.000415
474
6
457
6
470
16
97
465
10
6.84
0 .0 1
0.547010
0.013718
0.071714
0.001011
0.281187
0.056485 0.000324
443
9
446
6
471
13
95
446
11
0.14
my09A148
0.570112
0.012363
0.073563
0.001201 0.376501
0.056011 0.000376
458
8
458
7
453
15
101
458
13
0.00
242
549
186
0.848
0.935
0.500
206
my09A146
205
0.71 513
0.95
93
457
446
458
12
11
13
my09A151
0.576859
0.013717
0.072706
0.001144
0.330881 0.057812 0.000346
462
9
452
7
523
13
87
456
12
1.17
0 .2 8
0.616918
0.036538 0.078563
0.004145 0.445371 0.056335 0.000272
488
23
488
25
466
11
105
488
40
0.00
0.99
my09A154
1.987742
0.079195
0.188946
0.004912 0.326265 0.077416 0.000437
1111
27
1116
27
1132
11
99
1114
44
0.02
0.89
437
634
49
828
635
159
0.528
0.998
0.310
206
my09A153
Pb/238 U
concordia
concordia
452
488
1114
14
40
44
my09A157
0.615306
0.011942
0.077165
0.001077 0.359654 0.058530 0.000319
487
8
479
6
550
12
87
482
11
0.94
0 .3 3
2.568155
0.048994
0.221116
0.003063 0.363033 0.084787 0.000296
1292
14
1288
16
1311
7
98
1290
25
0.05
0.82
593
526
226
1.346
0.428
0.270
206
my09A158
798
225
61
Pb/238 U
concordia
concordia
479
1290
1625
13
25
48
206
1355
98
my09A134
3.183718
0.059569 0.245256 0.003958 0.431247
my09A135
1.658180
my09A136
0.61
0 .18
0.79
my09A161
3.971112
0.130174
0.285637 0.006535 0.348989
0.101952 0.000365
1628
27
1620
33
1660
7
98
1625
48
0.06
0.80
my09A163
2.972437
0.164655
0.233875
0.009418 0.363487 0.094425 0.000444
1401
42
1355
49
1517
9
89
1383
75
0.78
0 .3 8
56
456
0.123
my09A10
0.609856
0.021077
0.070835
0.002127 0.434463 0.060745 0.000551
483
13
441
13
630
20
70
460
22
9.17
0 .0 0
my09A14
0.576150
0.014286
0.070702
0.001447 0.412790
0.058233 0.000310
462
9
440
9
539
12
82
450
15
4.91 0 .0 3
my09A20
1.149699
0.062757
0.115486
0.005872 0.465758 0.070657 0.000457
777
30
705
34
948
13
74
748
55
4.79
my09A30
1.375260
0.071689
0.136596 0.006254 0.439130
0.072762 0.000374
878
31
825
35
1007
10
82
858
56
2.25
0 .13
my09A35
0.718820
0.054234
0.082215 0.004648 0.374668 0.069043 0.000702
550
32
509
28
900
21
57
524
49
1.44
0 .2 3
my09A41
1.922513
0.079346
0.173485 0.005072 0.354219
0.085012 0.000959
1089
28
1031
28
1316
22
78
1059
46
3.31 0 .0 7
my09A44
0.469756
0.009589 0.058830
0.000991 0.412470
0.056963 0.000414
391
7
369
6
490
16
75
378
11
10.64 0 .0 0
my09A48
0.478530
0.010275
0.065118
0.000812 0.290205 0.055070 0.000360
397
7
407
5
415
15
404
9
1.73
my09A53
1.502060
0.049961
0.144270 0.003694 0.384946 0.076553 0.000433
931
20
869
21
1110
11
78
900
35
7.42
0 .0 1
my09A73
0.626002
0.028800 0.073957 0.002730
630
24
73
474
29
3.15
0 .0 8
my09A127
0.710929
my09A131
0.608213
my09A138
172
355
129
86
27
18
65
33
72
192
71
781
142
57
190
515
525
917
299
111
119
292
489
129
377
401
635
243
209
747
0.334
0.676
0.141
0.286
0.240
0.150
0.222
0.068
0.560
0.509
0.177
1.231
0.586
0.273
0.254
98
0 .0 3
0 .19
0.401125
0.060729 0.000663
494
18
460
16
0.105991 0.078688
0.007541 0.321388
0.066226 0.000829
545
63
488
45
814
26
60
502
84
0.76
0 .3 8
0.016113
0.074073
0.001052 0.267995 0.058969 0.000394
482
10
461
6
566
15
81
465
12
4.30
0 .0 4
0.708042
0.021143
0.085097
0.001417
544
13
526
8
649
18
81
531
16
1.71
0 .19
my09A156
1.445711
0.078669
0.142928 0.006290 0.404395
0.073511 0.000382
908
33
861
35
1028
11
84
887
57
1.57
0 .2 1
my09A162
2.475624
0.138812
0.208689 0.007445
0.091701 0.000515
1265
41
1222
40
1461
11
84
1242
66
0.84
0 .3 6
0.278739 0.061283 0.000505
0.318136
(a) Concordancy value is equal to (206Pb/238U age / 207Pb/206Pb age)*100. Unacceptable values italicized and underlined.
(b) Concordia age determined using Isoplot function (Ludwig, 2012)
Pb/238 U
concordia
concordia
Pb/238 U
concordia
concordia
Pb/238 U
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
not used
(c) Probability of concordance statistic determined using Isoplot function. Unacceptable values italicized and underlined.
(d) Th/U ratio determined simultaneously with in-situ laser ablation. Potentially metamorphic values italicized and underlined.
(e) Age used in histogram plots. Criteria for selecting concordia, 206Pb/238U, or 207Pb/206Pb age outlined in methods section of text.
References unique to the Appendix:
Hoskin, P.W.O., and Schaltegger, U., 2003, The composition of zircon and igneous and metamorphic petrogenesis, in Hanchar, J.M., and Hoskin, P.W.O., eds.,
Zircon Reviews in Mineralogy and Geochemistry, v. 53, p. 27-62.
Hughes, K.S., 2014, Does the Chopawamsic Fault Represent the Main Iapetan Suture in the Southern Appalachian Orogen? Geology, Geochemistry, and
Geochronology of the Western Piedmont of Virginia and Insight into Local Intraplate Seismicity: Unpublished Doctoral Dissertation North Carolina
State University; Raleigh, NC, 321 ms p., http://www.lib.ncsu.edu/resolver/1840.16/9521
Owens, B., 2010, Geology in the heart of Virginia: the central Piedmont, 40 th annual Virginia Geological Field Conference, 28 p.
Pavlides, L., 1976, Guidebook for Field Trips 1 and 4: Piedmont Geology of the Fredericksburg, Virginia, Area and Vicinity: Geological Society of America,
Joint Northeast and Southeast Sections Meeting, 44 p.Rossman, D. L., 1991, Geology of the Keswick and Boswells Tavern Quadrangles, Virginia:
Virginia Division of Mineral Resources Publication 107, 19 p.
Rubatto, D., Zircon trace element geochemistry: partitioning with garnet and the link between U-Pb ages and metamorphism, Chemical Geology, v. 184, p. 123138.
Terblanche, A.A., and Nance, D.M., 2012, A tale of two basins: Geology along the Chopawamsic fault near Storck and Wilderness, VA: unpublished field
guide (contact Hughes for copy), North Carolina State University, 22 p.
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