Auxiliary material for Paper # 2013TC003332
Syn-extensional magmatism leading to crustal flow in the Albion - Raft-River - Grouse Creek
metamorphic core complex, northeastern Basin and Range.
Alexandros Konstantinou1
Ariel Strickland2
Elizabeth Miller1
Jeffrey Vervoort3
Christopher M. Fisher3
Joseph Wooden4,1
John Valley2
1
Department of Geological and Environmental Sciences, Stanford University, Stanford, CA,
94305.
2
WiscSIMS, Department of Geoscience, University of Wisconsin, 1215 W. Dayton Street,
Madison, WI, 53706.
3
School of the Environment, Washington State University, Pullman WA 99164-2812
4
U.S. Geological Survey, Menlo Park, CA, 94025
Tectonics, manuscript number 2013TC003332
Introduction
This auxiliary material contains detailed descriptions of analytical methods and data for U-Pb
geochronology (Appendix I), whole rock geochemistry (Appendix II and III), and in-situ zircon trace
element and isotopic compositions (Appendix IV, V and VI). These data were collected over four years
(Sept. 2008 through Sep. 2012) at the Stanford-USGS micro analytical center (SUMAC-zircon
geochronology and trace element compositions), at Macalester College and WSU (major and trace
element compositions), Stanford University’s ICPM-MS/TIMS lab (Sr-Nd isotope compositions), at the
U. of Wisconsin SIMS lab (zircon Oxygen isotope composition), and WSU Radiogenic Isotope and
Geochronology Laboratory (zircon Hf isotope compositions). The data was processed using the
methods described in detailed in the accompanying appendices text. References used in the appendices
can be found in the accompanying text.
Appendix I
Analytical methods and detailed description of data obtained by in-situ zircon SHRIMP-RG U-Pb
geochronology.
Table for Appendix I: U-Pb isotopic data used to calculate zircon U-Pb ages of Eocene and Oligocene
igneous rocks.
Column A: Sample and analytical spot name.
Column B: Common 206Pb as a percentage
Column C: U concentration in ppm
Column D: Th concentration in ppm
Column E: 232Th/238U isotope ratio
Column F: 204Pb corrected 206Pb/238U calculated age in Ma.
Column G: 1σ absolute error for column F in Ma
Column H: 207Pb corrected 206Pb/238U calculated age in Ma.
Column G: 1σ absolute error for column H in Ma
Column J: 238U/206Pb isotopic ratio
Column K: percent error for column J
Column L: 207Pb/206Pb isotopic ratio
Column M: percent error for column L
Column N: 204Corrected 207Pb/206Pb isotopic ratio
Column O: percent error for column N
Column P: Comments and reason for excluding analyses from the calculation of the sample age.
Figure for Appendix I: A-G. Concordia diagrams and weighted average diagrams for the samples dated
in this study. The intercept or Concordia ages are indicated for each sample, as well as the weighted
average age of the 207Pb-corrected 206Pb/238U ages for each sample. Dashed ellipses are interpreted as
antecrystic or inherited from earlier phases of the Emigrant Pass complex and were not included in the
weighted mean calculation. H. Concordia diagram showing the distribution of Precambrian inherited
zircon grains from the Emigrant Pass complex (grey squares and ellipses) and the CPC (black circles
and black ellipses). The inherited grains fall into three general age groups (~1100 Ma, ~1700 Ma and
2300-2600 Ma) and along their discordia with Mesozoic lower intercepts (~140 and 100 Ma).
Appendix II
Analytical methods for whole rock Major and trace element geochemical data
Table for Appendix II. Whole rock major and trace element data of Eocene, Oligocene and Precambrian
rocks of the ARG determined by XRF and dissolution ICP-MS.
Column A: Elements and oxides analyzed. Major elements reported in weight % of oxide; Trace
elements reported in ppm.
Columns B-Q: Geochemical data for individual samples
Appendix III
Detailed dissolution and analytical methods and data for whole rock Sr and Nd isotope analyses.
Table for Appendix III. Whole rock Sr and Nd isotope results from Eocene, Oligocene and Precambrian
rocks of the ARG.
Column A: Sample name
Column B and C: Elemental concentration for Rb (B) and Sr (C) in ppm
Column D: Approximate ratio of 87Rb/86Sr, see notes in table on calculation of the ratio
Column E: Measured 87Sr/86Sr isotope ratio
Column F: 2σ error for column E
Column G: Calculated initial Sr-isotope (87Sr/86Sr) ratio, for age reported in column Q. See notes in table
for details
Column H and I: Elemental concentration for Nd (B) and Sm (C) in ppm
Column J: Approximate ratio of 147Sm/144Nd, see notes in table on calculation of the ratio
Column K: Measured 143Nd/144Nd isotope ratio
Column L: 2σ error for column K
Column M: Calculated present day εNd value, see notes in table for details of the calculation
Column N: Calculated initial Sr-isotope (147Sm/144Nd) ratio, for age reported in column Q. See notes in
table for details.
Column O: Calculated εNd value for age reported in column Q, see notes in table for details of the
calculation
Column P: 2σ error for column O
Column Q: Age used for calculations of columns G, N and O.
Appendix IV
Methods used during in-situ zircon SHRIMP-RG trace element analyses and results.
Table for Appendix IV. SHRIMP-RG zircon Trace element data from Eocene and Oligocene rocks of
the ARG. Results without Sc, Ti, V, Cr, Mn, Fe data were not analyzed using the full trace element suite
procedure.
Column A: Sample and spot name
Column B: Comment and reason to exclude
Column C, E-G, and K-AC: Trace element abundances, in ppm
Column D: Isotope ratio of 48Ti/49Ti
Column H: Cerium anomaly calculated from La, Ce and Nd values
Column I: Europium anomaly calculated from Sm, Eu and Gd values
Column J: Magmatic Ti-in-zircon temperature calculated using Ti concentration, aSi=1, aTi=o.7 and
P=1GPa
Appendix V
Methods used for in-situ zircon SIMS O-isotope analyses and analytical data
Table for Appendix V. Results of zircon O-isotope analyses, performed at the WiscSIMS facility.
Column A: Spot number during analytical procedure
Column B: Name of analytical spot
Column C: Corrected δ18O value in ‰ (permil)
Column D: 2σ error for column C in ‰ (permil)
Column E: Fractionation factor calculated from external standard analyses of KIM5. See text for details
Column F: Measured δ18O value in ‰ (permil)
Column G: Internal precision of individual analysis, value in ‰ (permil)
Column H-K: Position (X, Y) of analytical spot from the center of the epoxy mount, with change in
position of the spot (DTFA-X and DTFA-Y). See Kita et al., (2009) for details
Column L: Comments and reason for rejection of individual analysis
Appendix VI
Methods used for in-situ zircon LA-ICP-MS Hf isotope analyses and analytical data
Table for Appendix VI. Results of zircon Hf isotope analyses, performed at the WSU LA-ICP-MS
facility.
Column A: Duration of analysis (s)
Column B: Spot name
Column C: Measured ratio of 176Hf/177Hf
Column D: Corrected ratio of 176Hf/177Hf, based on correction factor determined by analyzing interlaboratory standards. See text for details
Column E: 2σ error for Column D
Column F: Measured ratio of 176Lu/177Hf
Column G: 2σ error for Column F
Column H: Measured ratio of 176Yb/177Hf
Column I: 2σ error for Column H
Column J: Measured ratio of 178Hf/177Hf
Column K: 2σ error for Column J
Column L: Measured ratio of 180Hf/177Hf
Column M: 2σ error for Column L
Column N: Total Hf beam (V)
Column O: Empty
Column P: Age of sample (in Ma) used for calculation of columns Q, S and V. Age determined by
zircon U-Pb SHRIMP-RG analyses
Column Q: Calculated initial ratio of 176Hf/177Hf at age given in column P. See notes in table for details.
Column R: Calculated present day εHf value. See notes in table for details
Column S: Calculated εHf value at age reported in column P. See notes in table for details
Column T: 2σ error for Column S
Column U: Comment and/or reason for rejection of analysis
Column V: Calculated initial ratio of 176Hf/177Hf of Chondritic Uniform Reservoir (CHUR) at age
reported in column P.
Column W: empty
Columns X-AJ: U-Pb isotope results determined during LA-ICP-MS split stream analyses. Applies only
to samples analyses with a split-stream routine. See appendix text for details.
Column X: Measured 207Pb/235U ratio based on intercept method.
Column Y: 1σ absolute error for column X
Column Z: Measured 206Pb/238U ratio based on intercept method.
Column AA: 1σ absolute error for column Z
Column AB: Measured average 207Pb/206Pb ratio
Column AC: 1σ absolute error for column AB
Column AD: Error correlation (RHO) for values in columns X and Z
Column AE: Calculated age based on the 207Pb/235U ratio, in Ma
Column AF: 1σ absolute error for column AE, in Ma
Column AG: Calculated age based on the 206Pb/238U ratio, in Ma
Column AH: 1σ absolute error for column AG, in Ma
Column AI: Calculated age based on the 207Pb/206Pb ratio, in Ma
Column AJ: 1σ absolute error for column AI, in Ma