Dahl_p1215_08_T3.doc
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TABLE DR-3. 40Ar/39Ar analytical results for biotite from Black Hills metasedimentary rocks ________________________________________________________________________________ T a 40 b Ar ____ 38 b Ar ____ 37 b 36 Ar ____ b Ar ____ F c 39 Ar d 40 Ar* e K/Ca f K/Cl g Apparent Ar Ar Ar Ar (%) (%) Age (Ma) h (x100) _________________________________________________________________________________________________ 39 39 39 39 ST-116 biotite Run #62B57m (J = 0.016364 wt. = 1.30mg) 600 650 700 750 770 790 810 830 855 875 900 940 980 1000 1010 1020 1030 1035 1040 1045 1050 1065 1080 1110 1185 1250 114.1 75.25 86.05 87.56 87.14 86.95 86.94 86.63 87.15 87.46 87.91 87.40 87.06 86.30 86.55 86.40 86.85 86.35 86.91 87.40 87.53 87.64 87.68 87.88 88.69 88.96 0.1014 0.0143 0.0163 0.0141 0.0122 0.0123 0.0124 0.0124 0.0118 0.0114 0.0124 0.0124 0.0118 0.0113 0.0124 0.0119 0.0123 0.0110 0.0116 0.0117 0.0124 0.0117 0.0119 0.0123 0.0124 0.0106 0.0802 0.0112 0.0129 0.0081 0.0030 0.0040 0.0032 0.0053 0.0004 0.0051 0.0096 0.0083 0.0055 0.0051 0.0065 0.0039 0.0062 0.0038 0.0090 0.0047 0.0065 0.0045 0.0049 0.0041 0.0108 0.0350 20.70 1.410 1.180 0.647 0.192 0.093 0.063 0.050 0.058 0.062 0.074 0.025 0.027 0.024 0.068 0.083 0.049 0.042 0.044 0.117 0.057 0.017 0.038 0.023 0.020 0.138 52.97 71.06 82.54 85.63 86.55 86.65 86.73 86.46 86.95 87.26 87.66 87.31 86.96 86.21 86.32 86.13 86.68 86.20 86.76 87.04 87.34 87.57 87.55 87.79 88.61 88.54 0.31 1.22 2.78 4.37 3.94 4.33 4.46 4.06 3.51 2.96 3.13 3.45 5.25 6.26 5.74 6.20 5.12 3.93 3.42 3.55 3.04 3.70 3.46 4.07 6.57 1.15 46.40 94.50 96.00 97.80 99.30 99.70 99.80 99.80 99.80 99.80 99.90 99.90 99.90 99.90 99.80 99.70 99.80 99.90 99.90 99.60 99.80 99.90 99.90 99.90 99.90 99.50 6.52 46.7 40.5 64.3 177 130 164 99.1 138 102 54.4 62.8 94.4 103 80.3 133 83.8 139 58.0 112 80.1 116 107 128 48.4 14.9 Integrated 87.09 0.0125 0.0065 0.196 86.49 100 99.31 80.7 101 5940 1580 2470 4880 3850 3450 3400 5670 >10000 3500 3300 5330 >10000 3480 5360 3630 >10000 6550 7350 3430 5810 4930 3510 3280 >10000 1126 1392 1542 1580 1592 1593 1594 1591 1597 1600 1605 1601 1597 1587 1589 1586 1593 1587 1594 1598 1601 1604 1604 1607 1617 1616 3800 1591 “1593 ± 5” (69% of 39Ar) Plateau: 770 - 1050°C ± 52 ± 9 ± 4 ± 4 ± 4 ± 3 ± 3 ± 4 ± 4 ± 4 ± 4 ± 4 ± 3 ± 3 ± 3 ± 3 ± 3 ± 4 ± 4 ± 4 ± 4 ± 4 ± 4 ± 3 ± 3 ± 9 ST-116 biotite Run #62B55m (J = 0.016361 wt. = 0.93mg) 600 650 700 750 770 790 810 830 850 870 900 940 980 1000 1010 1020 1030 1035 1040 87.64 65.56 83.04 96.19 87.90 85.92 87.58 87.44 88.08 87.22 87.00 87.87 87.20 87.28 86.56 87.11 86.33 86.87 87.12 0.1379 0.0192 0.0159 0.0208 0.0126 0.0106 0.0112 0.0111 0.0105 0.0125 0.0114 0.0116 0.0123 0.0124 0.0118 0.0120 0.0120 0.0111 0.0112 0.0788 0.0270 0.0066 0.0052 0.0028 0.0030 0.0043 0.0043 0.0058 0.0013 0.0088 0.0064 0.0070 0.0077 0.0066 0.0059 0.0031 0.0014 0.0022 6.800 1.150 0.409 4.050 0.335 0.101 0.253 0.188 0.126 0.075 0.141 0.112 0.081 0.046 0.062 0.105 0.090 0.106 0.063 67.54 62.14 81.81 84.20 86.88 85.60 86.80 86.86 87.69 86.98 86.56 87.52 86.94 87.12 86.35 86.77 86.04 86.54 86.91 0.17 0.80 1.85 3.86 2.96 3.34 5.12 5.48 4.40 3.99 3.59 3.77 4.58 4.94 4.85 5.22 6.42 4.55 3.44 77.10 94.80 98.50 87.60 98.90 99.70 99.10 99.40 99.60 99.70 99.50 99.60 99.70 99.80 99.80 99.60 99.70 99.60 99.80 6.64 19.4 78.8 100.0 187 177 122 122 89.7 415 59.3 82.4 74.4 67.8 79.4 88.0 171 363 235 45.6 833 1200 2160 4350 >10000 >10000 >10000 >10000 3370 >10000 8430 3790 3380 5720 5060 4920 >10000 >10000 1343 1265 1533 1562 1596 1580 1595 1595 1605 1597 1592 1603 1596 1598 1589 1594 1585 1591 1596 ± 73 ± 15 ± 7 ± 5 ± 5 ± 4 ± 3 ± 3 ± 4 ± 5 ± 5 ± 4 ± 3 ± 4 ± 4 ± 4 ± 3 ± 4 ± 4 1045 1050 1065 1080 1110 1180 1250 87.94 87.72 88.52 88.03 88.43 88.24 90.70 0.0129 0.0123 0.0115 0.0130 0.0142 0.0122 0.0065 0.0032 0.0111 0.0051 0.0093 0.0103 0.0190 0.0397 0.067 0.037 0.033 0.138 0.050 0.070 0.528 87.72 87.58 88.40 87.60 88.26 88.01 89.12 3.24 3.47 3.53 4.03 3.96 7.53 0.90 99.80 99.90 99.90 99.50 99.80 99.80 98.30 162 47.1 102 56.5 50.8 27.5 13.2 2600 3580 7820 2650 1570 4030 >10000 1606 1604 1614 1604 1612 1609 1623 Integrated 87.54 0.0126 0.0071 0.288 86.67 100 99.00 73.8 4220 1593 “1596 ± 5” (67% of 39Ar) Plateau: 810 - 1050°C ± 5 ± 4 ± 4 ± 4 ± 5 ± 3 ± 13 PR-1 biotite Run #57L21m (J = 0.015132 wt. = 1.20mg) 530 580 630 660 690 710 730 750 770 790 810 830 850 870 900 930 960 990 1020 1050 1080 1120 1180 1250 1500 1600 78.02 37.28 68.40 82.95 80.79 82.92 84.45 84.07 84.82 83.80 84.73 83.96 86.13 84.73 86.98 83.46 84.32 84.39 87.45 86.63 88.35 89.98 92.85 102.6 94.17 171.4 0.0969 0.0164 0.0173 0.0246 0.0142 0.0148 0.0139 0.0137 0.0137 0.0141 0.0143 0.0179 0.0134 0.0158 0.0198 0.0125 0.0157 0.0158 0.0125 0.0134 0.0182 0.0162 0.0204 0.0183 0.0175 0.0775 0.0243 0.0093 0.0076 0.0038 0.0036 0.0031 0.0038 0.0032 0.0033 0.0044 0.0077 0.0258 0.0077 0.0172 0.0199 0.0056 0.0082 0.0111 0.0110 0.0137 0.0161 0.0280 0.0866 0.0259 0.0174 0.2248 22.02 0.516 0.480 2.216 0.097 0.077 0.064 0.087 0.073 0.139 0.136 0.615 0.884 1.192 1.412 0.197 0.409 0.301 0.288 0.387 0.622 1.121 4.212 3.901 3.197 29.95 12.93 35.73 66.95 76.37 80.48 82.67 84.23 83.79 84.58 83.37 84.31 82.13 83.50 81.18 82.78 82.85 83.09 83.48 86.58 85.47 86.49 86.65 80.39 91.09 84.70 82.93 0.90 5.16 7.72 6.36 9.57 12.03 11.25 10.81 9.99 7.78 3.56 1.04 0.52 0.68 1.15 1.54 2.04 2.14 1.89 1.41 1.02 0.57 0.20 0.17 0.43 0.05 16.60 95.90 97.90 92.10 99.60 99.70 99.80 99.70 99.70 99.50 99.50 97.80 97.00 95.80 95.20 99.30 98.60 98.90 99.00 98.70 97.90 96.30 86.60 88.80 90.00 48.40 Integrated 80.36 0.0161 0.0063 0.583 78.61 100 97.83 21.6 117 56.3 1110 69.1 923 136 538 145 1620 168 1350 139 1710 164 1880 156 1850 119 1700 67.7 1590 20.2 878 67.6 5490 30.4 1900 26.3 824 93.8 3790 63.5 1250 47.1 1180 47.7 4360 38.1 2680 32.6 831 18.7 1570 6.04 3000 20.2 >10000 30.1 7070 2.33 502 83.7 1230 ± 34 ± 3 ± 4 ± 4 ± 3 ± 3 ± 4 ± 3 ± 4 ± 4 ± 5 ± 12 ± 20 ± 15 ± 11 ± 8 ± 6 ± 7 ± 7 ± 9 ± 10 ± 19 ± 41 ± 40 ± 19 ±207 1414 “1478 ± 5” (53% of 39Ar) Plateau: 730 - 990°C 322 780 1262 1386 1437 1464 1483 1477 1487 1472 1483 1457 1474 1446 1465 1466 1469 1474 1511 1497 1509 1511 1436 1563 1488 1467 ST-106 biotite Run #62B49m (J = 0.016351 wt. = 1.60mg) 600 650 700 750 770 800 810 830 850 870 900 940 980 67.78 77.07 89.50 89.86 89.32 89.60 89.50 89.38 88.67 89.20 89.90 90.11 89.58 0.0508 0.0166 0.0181 0.0125 0.0130 0.0122 0.0110 0.0117 0.0122 0.0124 0.0114 0.0114 0.0121 0.0339 0.0102 0.0099 0.0034 0.0041 0.0091 0.0047 0.0059 0.0043 0.0034 0.0083 0.0038 0.0034 5.739 0.876 1.485 0.294 0.211 0.112 0.104 0.200 0.079 0.036 0.080 0.075 0.040 50.80 74.46 85.09 88.96 88.67 89.24 89.16 88.76 88.41 89.07 89.64 89.86 89.43 0.51 1.22 3.11 5.57 2.88 2.24 2.07 2.11 3.66 1.88 2.37 3.29 4.42 75.00 96.60 95.10 99.00 99.30 99.60 99.70 99.30 99.70 99.90 99.70 99.80 99.90 15.4 51.1 52.7 154 127 57.6 112 89.4 122 153 62.8 137 155 178 1250 1140 4370 2830 4150 >10000 8710 4210 3410 >10000 >10000 4270 1091 1437 1573 1620 1616 1623 1622 1618 1613 1621 1628 1631 1626 ± 16 ± 6 ± 4 ± 3 ± 4 ± 4 ± 4 ± 4 ± 3 ± 5 ± 4 ± 4 ± 3 1000 1010 1020 1030 1035 1040 1045 1050 1065 1080 1110 1180 1260 1300 90.27 90.08 89.62 89.61 89.52 89.48 89.53 89.99 89.72 89.50 90.20 90.37 90.80 91.99 0.0122 0.0117 0.0127 0.0116 0.0126 0.0117 0.0119 0.0122 0.0121 0.0107 0.0121 0.0117 0.0122 0.0106 0.0085 0.0044 0.0051 0.0033 0.0018 0.0034 0.0021 0.0014 0.0034 0.0024 0.0039 0.0056 0.0159 0.0343 0.024 0.039 0.020 0.029 0.045 0.045 0.070 0.069 0.020 0.048 0.026 0.033 0.034 0.235 90.18 89.94 89.59 89.50 89.36 89.33 89.29 89.76 89.64 89.34 90.10 90.25 90.67 91.28 4.02 4.03 3.59 4.25 4.56 4.40 3.90 3.43 5.56 6.56 7.31 7.84 4.47 0.76 99.90 99.90 99.90 99.90 99.80 99.80 99.80 99.80 99.90 99.80 99.90 99.90 99.90 99.20 61.7 119 103 159 299 153 247 370 154 222 135 93.1 32.8 15.3 3740 6280 2750 7050 2950 5960 5210 4070 4060 >10000 4000 5950 3760 >10000 1635 1632 1627 1626 1625 1624 1624 1630 1628 1625 1634 1635 1640 1648 Integrated 89.54 0.0124 0.0053 0.152 89.06 100 99.47 99.2 3920 1621 3 3 3 3 3 3 4 3 3 3 2 2 3 9 “1629 ± 5” (70% of 39Ar) Plateau: 900 - 1180°C ± ± ± ± ± ± ± ± ± ± ± ± ± ± SI-47 biotite Run #57L14m (J = 0.015059 wt. = 1.20mg) 500 580 630 660 690 710 730 760 790 820 850 880 910 940 970 1000 1030 1060 1090 1120 1180 1230 1300 1400 166.9 57.81 80.38 101.0 86.41 86.10 87.67 87.95 88.23 88.08 88.11 88.63 89.75 86.46 87.51 88.95 89.94 91.04 92.02 98.90 101.0 100.1 100.0 121.8 0.3370 0.0183 0.0176 0.0455 0.0146 0.0123 0.0137 0.0129 0.0135 0.0133 0.0149 0.0182 0.0185 0.0174 0.0127 0.0121 0.0166 0.0142 0.0128 0.0139 0.0258 0.0280 0.0261 0.0328 0.0960 0.0180 0.0051 0.0063 0.0026 0.0018 0.0027 0.0016 0.0059 0.0008 0.0056 0.0147 0.0117 0.0231 0.0135 0.0140 0.0247 0.0285 0.0277 0.0147 0.0159 0.0976 0.0614 0.1971 50.82 1.129 0.974 6.451 0.403 0.185 0.124 0.111 0.136 0.103 0.787 1.138 1.287 0.819 0.277 0.739 1.147 1.823 2.349 3.456 5.301 5.429 3.394 13.22 16.74 54.45 77.48 81.90 85.20 85.53 87.28 87.60 87.80 87.75 85.76 85.24 85.92 84.02 86.67 86.75 86.53 85.63 85.05 88.67 85.34 84.01 89.99 82.72 0.30 2.68 5.08 4.22 6.35 7.55 9.53 15.39 22.35 12.07 1.69 1.31 1.41 1.69 2.08 1.73 1.13 0.77 0.56 0.44 0.40 0.42 0.69 0.18 10.00 94.20 96.40 81.10 98.60 99.40 99.60 99.60 99.50 99.70 97.40 96.20 95.80 97.20 99.10 97.50 96.20 94.10 92.50 89.70 84.50 84.00 90.00 67.90 5.45 29.0 103 83.4 204 296 195 331 88.6 643 94.1 35.7 44.8 22.7 38.8 363 21.2 18.4 18.9 35.6 32.8 5.36 8.51 2.65 Integrated 87.74 0.0165 0.0066 0.838 85.24 100 97.15 79.2 22.6 967 1030 231 1690 4250 1950 2670 2140 2200 1940 982 979 1030 3750 1584 1430 5780 2180 1550 1020 743 586 1850 406 1081 1396 1450 1490 1494 1514 1518 1521 1520 1497 1490 1498 1476 1507 1508 1506 1495 1488 1531 1492 1476 1546 1460 1260 1490 (59% of 39Ar) Plateau: 730 - 820°C ±116 ± 7 ± 5 ± 7 ± 4 ± 4 ± 4 ± 3 ± 5 ± 4 ± 14 ± 11 ± 10 ± 9 ± 7 ± 9 ± 12 ± 14 ± 19 ± 26 ± 27 ± 26 ± 16 ± 63 1519 ± 4 ST-61 biotite Run #57L35m (J = 0.014977 wt. = 1.00mg) 525 580 610 635 660 685 700 715 59.71 80.39 98.63 116.0 94.02 95.00 93.53 94.15 0.0596 0.0149 0.0317 0.0536 0.0112 0.0117 0.0125 0.0112 0.1073 0.0445 0.0346 0.0382 0.0368 0.0173 0.0213 0.0102 6.446 0.579 3.749 7.667 0.195 0.005 0.215 0.088 40.65 78.66 87.53 93.30 93.43 94.96 92.87 93.87 0.62 1.38 1.64 1.92 1.87 2.56 2.63 2.98 68.10 97.90 88.80 80.50 99.40 100.00 99.30 99.70 4.87 142 11.8 1730 15.1 376 13.7 184 14.2 >10000 30.3 5520 24.5 4050 51.4 >10000 858 1404 1511 1577 1579 1596 1573 1584 ± 26 ± 11 ± 14 ± 12 ± 10 ± 7 ± 9 ± 8 730 745 760 775 790 810 830 850 880 900 950 1000 1050 1110 1180 1250 1455 1600 94.10 95.60 95.14 95.07 96.15 95.59 96.10 95.75 96.85 95.23 94.53 94.40 95.28 96.78 98.02 99.50 148.7 393.7 0.0145 0.0117 0.0124 0.0129 0.0116 0.0126 0.0110 0.0125 0.0140 0.0111 0.0127 0.0127 0.0122 0.0132 0.0139 0.0171 0.0952 0.1839 0.0118 0.0196 0.0346 0.0162 0.0134 0.0194 0.0192 0.0207 0.0173 0.0106 0.0057 0.0055 0.0053 0.0220 0.0868 0.1781 2.083 5.573 0.173 0.072 0.138 0.114 0.095 0.059 0.012 0.068 0.109 -0.002 0.028 0.035 0.002 0.100 0.767 1.292 14.35 76.28 93.56 95.36 94.71 94.71 95.84 95.39 96.04 95.53 96.51 95.21 94.42 94.27 95.25 96.46 95.74 95.68 106.6 169.3 2.75 2.54 2.41 2.60 2.78 2.96 2.92 2.93 3.62 4.33 12.28 16.76 16.86 6.46 1.35 0.70 0.10 0.03 99.50 99.80 99.60 99.60 99.70 99.80 100.00 99.80 99.70 100.00 99.90 99.90 100.00 99.70 97.70 96.20 71.60 42.80 Integrated 95.35 0.0141 0.0199 0.364 94.25 100 98.85 44.2 1510 26.7 6610 15.1 3830 32.3 2780 39.1 8100 27.0 3070 27.3 >10000 25.2 3170 30.2 1700 49.5 >10000 92.2 2780 95.3 2760 99.1 3550 23.7 2350 6.02 3120 2.94 1330 0.251 91.0 0.094 178 1580 1601 1593 1593 1606 1601 1608 1602 1613 1599 1590 1588 1599 1613 1605 1604 1722 2278 26.3 1588 2000 “1596 ± 5” (73% of 39Ar) Plateau: 745 - 1050°C ± 9 ± 7 ± 8 ± 8 ± 7 ± 9 ± 7 ± 7 ± 7 ± 7 ± 4 ± 4 ± 4 ± 5 ± 11 ± 20 ±130 ±647 ST-60 biotite Run #62B36m (J = 0.016314 wt. = 2.04mg) 600 650 700 750 770 790 810 830 850 870 900 940 980 1000 1020 1030 1035 1040 1045 1050 1055 1060 1065 1070 1080 1100 1150 1200 35.42 55.34 74.37 83.76 83.32 85.18 84.81 84.93 85.08 84.71 84.87 84.69 84.65 83.82 85.13 84.80 84.68 85.97 86.64 86.73 86.37 86.81 86.84 86.84 86.99 87.41 87.63 88.52 0.0301 0.0156 0.0139 0.0162 0.0134 0.0131 0.0126 0.0125 0.0122 0.0117 0.0115 0.0117 0.0122 0.0096 0.0135 0.0120 0.0126 0.0116 0.0122 0.0134 0.0119 0.0131 0.0123 0.0114 0.0103 0.0102 0.0129 0.0137 0.0213 0.0077 0.0052 0.0081 0.0021 0.0025 0.0028 0.0034 0.0026 0.0041 0.0044 0.0024 0.0033 0.0105 0.0027 0.0044 0.0108 0.0022 0.0021 0.0044 0.0042 0.0011 0.0041 0.0034 0.0058 0.0086 0.0049 0.0084 3.002 0.536 0.165 1.154 0.216 0.469 0.110 0.092 0.108 0.144 0.044 0.080 0.057 0.025 0.026 0.093 0.038 0.048 0.044 0.025 0.097 0.187 0.117 0.131 0.126 0.059 0.131 0.216 26.53 53.73 73.86 80.33 82.65 83.77 84.46 84.64 84.74 84.26 84.72 84.43 84.46 83.72 85.02 84.50 84.55 85.80 86.48 86.75 86.06 86.23 86.47 86.43 86.60 87.21 87.22 87.86 0.90 1.93 4.28 7.41 5.09 3.22 3.39 3.38 2.76 2.37 2.57 2.94 5.11 6.75 10.20 8.64 6.79 4.90 3.59 2.65 2.14 1.66 1.42 1.17 0.96 0.95 1.89 0.95 74.90 97.10 99.30 95.90 99.20 98.40 99.60 99.70 99.60 99.50 99.80 99.70 99.80 99.90 99.90 99.70 99.90 99.80 99.80 99.90 99.70 99.40 99.60 99.60 99.60 99.80 99.60 99.30 24.6 67.6 101 64.5 244 208 189 154 198 127 120 214 157 49.6 195 118 48.6 241 244 119 124 461 129 155 89.9 61.0 106 62.5 Integrated 83.59 0.0128 0.0050 0.209 82.95 100 99.23 105 Plateau: 810 - 1035°C (55% of 39Ar) ST-60 biotite Run #62B34m (J = 0.016306 wt. = 1.17mg) 383 1380 1870 1600 2390 3630 3310 3300 4200 8250 8320 6610 4020 >10000 1970 4930 2910 6960 3810 1970 5540 2620 4130 >10000 >10000 >10000 2720 2070 649 1136 1426 1511 1540 1554 1563 1565 1566 1560 1566 1562 1563 1554 1570 1563 1564 1579 1588 1591 1582 1584 1587 1587 1589 1596 1597 1604 3150 1544 ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± 9 3 3 6 3 3 3 3 3 4 4 3 2 6 4 5 6 2 3 3 4 4 5 5 6 6 4 7 1563 ± 5 600 650 700 750 770 795 810 830 850 870 900 940 985 1000 1015 1020 1025 1030 1035 1040 1045 1050 1055 1060 1070 1085 1100 1150 1250 35.26 51.53 74.31 84.29 83.35 85.63 84.36 85.16 86.65 86.30 85.55 85.47 85.37 85.32 85.78 86.37 86.56 86.74 86.65 86.45 87.31 87.19 87.79 87.86 87.47 88.32 87.83 87.63 87.69 0.0323 0.0131 0.0128 0.0154 0.0129 0.0138 0.0129 0.0119 0.0126 0.0114 0.0125 0.0134 0.0129 0.0133 0.0130 0.0124 0.0121 0.0122 0.0105 0.0117 0.0133 0.0125 0.0110 0.0156 0.0103 0.0083 0.0120 0.0117 0.0121 0.0271 0.0124 0.0049 0.0042 0.0022 0.0048 0.0034 0.0023 0.0018 0.0033 0.0057 0.0071 0.0032 0.0023 0.0029 0.0030 0.0026 0.0008 0.0060 0.0080 0.0070 0.0010 0.0126 0.0135 0.0182 0.0109 0.0123 0.0059 0.0228 2.187 0.478 0.245 1.392 0.143 0.327 0.017 0.078 0.230 0.108 0.082 0.115 0.090 0.049 0.021 0.027 0.060 0.082 0.105 0.025 0.052 0.038 0.130 0.174 0.178 0.042 0.139 0.070 0.089 28.78 50.10 73.56 80.15 82.90 84.64 84.29 84.91 85.95 85.96 85.29 85.11 85.08 85.15 85.69 86.26 86.35 86.48 86.31 86.43 87.13 87.05 87.38 87.32 86.93 88.42 87.40 87.40 87.40 0.51 1.73 3.65 7.21 6.62 4.21 4.26 4.96 5.63 3.38 2.68 3.27 4.66 6.75 6.96 6.33 4.37 3.70 3.22 2.51 1.99 1.66 1.50 1.22 1.11 1.00 1.20 2.36 1.34 81.70 97.30 99.00 95.10 99.50 98.90 99.90 99.70 99.20 99.60 99.70 99.60 99.70 99.80 99.90 99.90 99.80 99.70 99.60 99.90 99.80 99.90 99.60 99.40 99.40 99.90 99.50 99.80 99.70 19.3 42.1 108 126 236 108 155 226 289 157 92.0 73.3 163 229 180 175 199 687 87.7 65.4 75.1 502 41.4 38.6 28.8 48.1 42.7 88.9 23.0 Integrated 84.54 0.0128 0.0047 0.211 83.90 100 99.24 112 299 3540 3230 2560 2870 2180 2440 5580 3680 >10000 3360 2170 2720 2140 2410 3370 4400 4080 >10000 5550 2180 3130 >10000 1150 >10000 >10000 5380 6930 4490 694 1077 1422 1508 1543 1564 1560 1568 1581 1581 1572 1570 1570 1571 1577 1584 1585 1587 1585 1586 1595 1594 1598 1597 1592 1611 1598 1598 1598 3170 1555 “1579 ± 5” (53% of 39Ar) Plateau: 852 - 1045°C ± 20 ± 6 ± 3 ± 3 ± 3 ± 3 ± 3 ± 3 ± 3 ± 4 ± 5 ± 4 ± 3 ± 3 ± 2 ± 3 ± 3 ± 4 ± 4 ± 5 ± 5 ± 6 ± 8 ± 8 ± 9 ± 9 ± 8 ± 5 ± 8 ST-68 biotite Run #62B59m (J = 0.016366 wt. = 1.10mg) 600 650 700 740 760 780 800 830 860 890 920 960 990 1010 1020 1030 1040 1050 1060 1070 1110 1170 56.07 52.13 69.30 131.8 84.57 79.84 81.12 81.02 81.77 82.22 82.51 81.36 79.17 78.75 78.67 78.99 79.33 79.72 80.64 81.69 81.90 83.12 0.3517 0.0636 0.0511 0.0998 0.0249 0.0180 0.0151 0.0155 0.0165 0.0152 0.0160 0.0159 0.0152 0.0150 0.0156 0.0161 0.0145 0.0145 0.0157 0.0162 0.0154 0.0142 0.4228 0.4806 0.7377 0.1134 0.0197 0.0051 0.0052 0.0071 0.0171 0.0168 0.0193 0.0221 0.0121 0.0042 0.0093 0.0136 0.0067 0.0078 0.0099 0.0121 0.0101 0.0182 8.400 1.320 0.544 20.49 2.570 0.410 0.182 0.230 0.202 0.198 0.126 0.136 0.172 0.086 0.129 0.180 0.026 0.171 0.216 0.173 0.179 0.181 31.27 48.26 67.76 71.23 76.95 78.61 80.56 80.32 81.15 81.61 82.11 80.93 78.64 78.47 78.27 78.43 79.23 79.19 79.97 81.16 81.35 82.56 0.67 1.10 2.11 5.24 3.84 3.92 5.59 8.40 6.72 4.04 4.20 4.85 3.84 5.81 9.11 4.65 4.55 4.63 3.68 3.21 4.34 5.50 55.80 92.60 97.80 54.10 91.00 98.50 99.30 99.20 99.30 99.30 99.60 99.50 99.40 99.70 99.50 99.30 99.90 99.40 99.20 99.40 99.40 99.40 1.24 1.09 0.709 4.61 26.5 102 102 73.9 30.6 31.1 27.2 23.7 43.2 124 56.4 38.5 77.6 67.5 52.7 43.2 51.8 28.7 16.1 104 133 103 561 808 1310 1210 976 1290 1050 1070 1270 1280 1140 1050 1420 1530 1150 1020 1220 1690 746 1050 1346 1394 1470 1492 1517 1514 1525 1530 1537 1522 1492 1490 1488 1490 1500 1499 1510 1525 1527 1542 Integrated 82.73 0.0238 0.0402 1.406 78.56 100 94.96 13.0 501 1491 ± 21 ± 8 ± 5 ± 10 ± 4 ± 3 ± 3 ± 2 ± 3 ± 4 ± 4 ± 3 ± 4 ± 3 ± 2 ± 3 ± 3 ± 4 ± 4 ± 4 ± 3 ± 3 ST-103 biotite Run #62B43m (J = 0.016338 wt. = 0.95mg) 600 650 700 750 770 790 810 830 850 870 900 940 980 1000 1020 1030 1035 1040 1045 1050 1055 1060 1065 1070 1080 1100 1150 1200 1300 92.26 65.03 85.76 95.04 90.69 90.47 91.48 90.58 90.59 90.56 91.14 89.96 90.94 90.26 90.39 90.77 90.29 89.59 90.25 90.59 91.17 91.10 91.35 90.67 91.78 91.47 91.28 92.52 95.81 0.1188 0.0234 0.0156 0.0236 0.0158 0.0150 0.0156 0.0147 0.0141 0.0142 0.0120 0.0138 0.0132 0.0137 0.0131 0.0140 0.0148 0.0135 0.0139 0.0146 0.0137 0.0139 0.0154 0.0143 0.0149 0.0131 0.0143 0.0151 0.0178 0.0683 0.0399 0.0125 0.0076 0.0064 0.0104 0.0087 0.0110 0.0114 0.0076 0.0051 0.0103 0.0042 0.0089 0.0035 0.0057 0.0081 0.0045 0.0053 0.0098 0.0057 0.0075 0.0147 0.0135 0.0057 0.0098 0.0113 0.0215 0.0658 13.87 1.365 0.643 2.193 0.313 0.151 0.476 0.230 0.141 0.130 -0.040 0.149 0.114 0.039 0.054 0.017 0.059 0.085 0.124 -0.005 0.122 0.071 0.064 0.163 0.177 0.023 0.100 0.071 0.678 51.27 60.98 83.84 88.54 89.74 90.00 90.05 89.87 90.15 90.15 91.23 89.49 90.58 90.12 90.21 90.70 90.10 89.32 89.86 90.58 90.79 90.87 91.14 90.17 91.23 91.38 90.96 92.29 93.79 0.39 0.68 2.03 4.59 3.36 2.65 2.38 2.31 2.82 2.37 2.82 3.42 4.36 4.07 4.64 4.88 4.52 4.29 4.40 3.82 4.40 3.91 3.28 2.90 3.25 3.27 6.42 6.85 0.95 55.60 93.80 97.80 93.20 99.00 99.50 98.50 99.20 99.50 99.60 100.10 99.50 99.60 99.90 99.80 99.90 99.80 99.70 99.60 100.00 99.60 99.80 99.80 99.50 99.40 99.90 99.70 99.80 97.90 7.66 13.1 41.9 68.9 82.3 50.5 60.2 47.6 46.0 68.9 103 50.9 126 58.8 149 92.1 64.6 116 99.2 53.3 91.5 69.4 35.5 38.7 91.6 53.6 46.3 24.3 7.95 Integrated 90.84 0.0151 0.0100 0.279 89.99 100 99.07 52.4 63.7 519 1440 600 1190 1330 1320 1500 1730 1650 4030 1900 2330 1800 2310 1640 1320 2030 1810 1340 1910 1760 1150 1610 1370 2270 1580 1260 908 1098 1247 1557 1614 1629 1632 1632 1630 1633 1633 1646 1626 1639 1633 1634 1640 1633 1623 1630 1638 1641 1642 1645 1634 1646 1648 1643 1659 1676 1360 1631 “1636 ± 5” (85% of 39Ar) Plateau: 770 - 1150°C ± 45 ± 16 ± 6 ± 4 ± 5 ± 7 ± 6 ± 6 ± 5 ± 6 ± 6 ± 4 ± 4 ± 4 ± 4 ± 4 ± 4 ± 4 ± 4 ± 4 ± 4 ± 4 ± 5 ± 5 ± 5 ± 5 ± 3 ± 3 ± 14 ST-17 biotite Run #62B20m (J = 0.016241 wt. = 1.03mg) 600 675 700 750 830 850 855 860 870 875 880 885 890 900 935 960 980 1000 1030 1050 1080 1100 55.06 91.93 108.2 104.8 104.4 105.4 104.5 105.0 103.8 104.2 103.1 102.6 103.3 103.5 102.4 104.3 104.2 105.4 105.5 105.7 103.7 104.2 0.0336 0.0237 0.0290 0.0167 0.0168 0.0166 0.0172 0.0167 0.0161 0.0150 0.0145 0.0164 0.0157 0.0144 0.0147 0.0173 0.0182 0.0167 0.0159 0.0171 0.0155 0.0186 0.0123 0.0039 0.0034 0.0016 0.0025 0.0010 0.0005 0.0022 0.0022 0.0019 0.0002 0.0067 0.0015 0.0002 0.0031 0.0044 0.0048 0.0041 0.0030 0.0053 0.0117 0.0027 1.420 0.342 2.079 0.129 0.047 0.024 0.066 0.060 0.084 0.025 0.001 0.171 0.244 0.122 0.150 0.112 0.125 0.063 0.082 0.025 0.067 0.020 50.84 90.90 102.0 104.4 104.2 105.3 104.3 104.8 103.5 104.1 103.1 102.1 102.5 103.8 101.9 103.9 103.8 105.2 105.2 105.7 103.5 104.1 0.74 2.89 5.74 9.18 4.63 3.87 2.54 1.74 2.14 1.57 1.27 1.34 1.08 1.15 1.28 1.60 2.52 3.32 7.43 9.35 11.44 12.77 92.40 98.90 94.30 99.60 99.90 99.90 99.80 99.80 99.80 99.90 99.90 99.50 99.30 99.50 99.60 99.70 99.60 99.80 99.80 99.90 99.80 99.90 42.5 134 156 337 211 523 1050 233 239 272 2610 77.9 351 2610 169 120 109 128 177 99.1 44.7 197 259 425 364 918 878 899 828 897 1020 1250 1400 990 1170 1350 1430 826 725 891 1050 825 1130 672 1086 1636 1763 1789 1787 1799 1788 1793 1779 1786 1774 1764 1768 1782 1762 1784 1783 1797 1798 1803 1779 1786 ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± 2 4 3 3 4 4 5 8 6 8 9 9 9 9 8 8 6 4 3 3 6 6 1125 1150 1180 1200 105.0 103.8 103.6 104.9 0.0168 0.0146 0.0168 0.0167 0.0129 0.0341 0.0492 0.0513 0.037 0.190 0.324 0.190 104.8 103.2 102.6 104.4 6.19 1.48 1.00 1.73 99.90 99.50 99.10 99.50 40.5 15.3 10.6 10.2 876 1500 955 937 1794 1776 1769 1789 Integrated 104.0 0.0177 0.0064 0.200 103.4 100 99.41 82.1 794 1778 0.26 0.41 2.08 1.90 1.68 2.46 3.82 3.04 4.35 3.47 2.48 2.57 3.33 4.51 6.18 9.23 12.50 9.08 6.41 5.18 3.89 3.12 2.21 1.35 0.85 0.63 0.87 0.75 0.84 0.33 0.21 60.50 92.10 98.10 99.20 99.40 99.50 92.20 98.30 99.10 98.70 99.70 99.70 99.90 99.80 99.80 99.90 99.60 99.90 99.80 99.80 99.70 99.80 99.50 99.50 98.70 98.70 98.70 98.90 97.90 96.00 92.20 7.31 10.7 37.6 74.3 28.6 50.3 127 124 102 87.2 56.0 62.0 91.8 194 84.2 98.7 36.2 86.5 84.2 53.0 43.4 39.6 33.7 16.9 10.8 8.14 9.72 8.50 9.10 8.39 3.02 22.7 183 680 360 411 391 340 714 679 944 1220 1240 868 1150 988 812 775 798 1060 796 1070 1110 1130 766 5260 706 801 751 543 1290 377 1098 1169 1599 1742 1772 1776 1795 1789 1787 1787 1786 1767 1773 1768 1791 1808 1791 1801 1802 1794 1793 1795 1805 1790 1787 1767 1795 1831 1805 1790 1812 100 99.08 45.8 699 1784 0.54 1.62 3.75 5.79 5.44 3.94 3.83 5.84 7.61 3.97 2.75 8.78 4.57 5.41 4.63 93.40 98.50 97.40 99.10 99.70 99.70 99.70 99.90 99.70 99.70 99.80 99.60 99.80 99.90 99.90 12.3 27.7 69.4 77.9 112 70.5 55.2 151 172 71.4 50.3 56.1 108 121 89.7 138 955 1580 1690 2940 2960 >10000 7690 2830 3950 2760 >10000 5630 3630 4470 1123 1503 1639 1683 1680 1683 1676 1676 1692 1697 1683 1691 1695 1687 1683 ± 3 ± 8 ± 10 ± 7 ST-17 biotite Run #62B22m (J = 0.016251 wt. = 1.09mg) 550 600 675 700 725 750 770 790 815 830 850 870 900 840 980 1020 1040 1055 1060 1070 1080 1090 1100 1110 1120 1130 1140 1150 1170 1200 1250 85.25 60.88 89.47 101.0 103.4 103.7 113.8 106.2 105.2 105.6 104.4 102.6 102.9 102.7 104.8 106.3 105.0 105.6 105.7 105.0 105.0 105.2 106.3 105.0 105.5 103.6 106.4 109.4 108.1 108.8 115.5 Integrated 104.8 0.2618 0.0423 0.0195 0.0258 0.0238 0.0244 0.0318 0.0192 0.0191 0.0172 0.0153 0.0152 0.0168 0.0155 0.0162 0.0173 0.0178 0.0174 0.0158 0.0174 0.0159 0.0156 0.0157 0.0179 0.0126 0.0190 0.0182 0.0185 0.0218 0.0176 0.0304 0.0715 0.0487 0.0139 0.0070 0.0183 0.0104 0.0041 0.0042 0.0051 0.0060 0.0093 0.0084 0.0057 0.0027 0.0062 0.0053 0.0144 0.0060 0.0062 0.0099 0.0121 0.0132 0.0155 0.0310 0.0485 0.0643 0.0538 0.0615 0.0575 0.0623 0.1732 11.39 1.622 0.580 0.285 0.199 0.170 3.023 0.620 0.334 0.457 0.113 0.099 0.024 0.083 0.076 0.051 0.160 0.051 0.065 0.056 0.113 0.067 0.166 0.174 0.458 0.444 0.481 0.394 0.758 1.463 3.062 51.57 56.07 87.73 100.1 102.7 103.2 104.9 104.3 104.2 104.2 104.1 102.3 102.9 102.5 104.5 106.1 104.5 105.4 105.5 104.8 104.7 104.9 105.8 104.5 104.2 102.3 104.9 108.2 105.8 104.4 106.5 0.0188 0.0114 0.320 103.8 ± 52 ± 25 ± 6 ± 6 ± 7 ± 6 ± 5 ± 6 ± 4 ± 4 ± 6 ± 5 ± 4 ± 4 ± 3 ± 3 ± 6 ± 3 ± 3 ± 4 ± 4 ± 5 ± 6 ± 9 ± 13 ± 16 ± 13 ± 14 ± 13 ± 31 ± 46 ST-45 biotite Run #62B27m (J = 0.016280 wt. = 1.53mg) 600 650 700 750 770 790 810 830 850 875 900 940 980 1000 1015 56.81 81.08 93.38 95.53 94.74 95.03 94.41 94.36 95.78 96.31 94.88 95.86 95.91 95.20 94.80 0.0509 0.0170 0.0156 0.0144 0.0127 0.0127 0.0113 0.0116 0.0128 0.0123 0.0128 0.0108 0.0118 0.0123 0.0120 0.0425 0.0189 0.0075 0.0067 0.0047 0.0074 0.0095 0.0035 0.0030 0.0073 0.0104 0.0093 0.0048 0.0043 0.0058 1.262 0.405 0.807 0.277 0.083 0.087 0.083 0.080 0.100 0.110 0.052 0.139 0.054 0.048 0.034 53.06 79.87 90.97 94.69 94.47 94.75 94.14 94.10 95.46 95.97 94.70 95.43 95.73 95.03 94.68 ± 14 ± 6 ± 4 ± 3 ± 3 ± 3 ± 4 ± 3 ± 3 ± 4 ± 4 ± 6 ± 3 ± 3 ± 3 1025 1030 1035 1040 1045 1050 1055 1060 1065 1070 1090 1100 1160 1200 94.97 96.10 95.94 95.32 95.91 96.20 96.32 96.85 96.94 97.90 97.13 97.22 97.65 98.30 0.0117 0.0132 0.0137 0.0124 0.0117 0.0105 0.0139 0.0105 0.0113 0.0106 0.0099 0.0128 0.0114 0.0125 0.0049 0.0213 0.0084 0.0043 0.0067 0.0065 0.0077 0.0091 0.0141 0.0161 0.0145 0.0210 0.0209 0.0250 0.029 0.039 0.057 0.035 0.059 0.031 0.031 0.041 0.055 0.089 0.069 0.145 0.063 0.057 94.86 95.97 95.75 95.19 95.71 96.09 96.20 96.71 96.76 97.61 96.90 96.77 97.44 98.11 3.99 3.05 2.90 3.10 2.73 2.22 1.89 1.55 1.31 1.34 1.27 1.22 1.92 3.05 99.90 99.90 99.80 99.90 99.80 99.90 99.90 99.90 99.80 99.70 99.80 99.60 99.80 99.80 106 24.6 62.4 122 77.9 80.5 67.7 57.5 37.2 32.5 36.1 24.9 25.0 20.9 6010 2220 1850 3340 6380 >10000 1700 >10000 >10000 >10000 >10000 2970 >10000 3220 1685 1697 1695 1689 1695 1699 1700 1706 1707 1716 1708 1707 1714 1722 Integrated 95.14 0.0126 0.0085 0.124 94.75 100 99.59 61.5 3290 1683 3 4 4 4 5 5 6 6 7 7 7 7 5 4 “1687 ± 5” (81% of 39Ar) Plateau: 750 - 1050°C ± ± ± ± ± ± ± ± ± ± ± ± ± ± ST-15 biotite Run #62B15m (J = 0.016218 wt. = 1.45mg) 600 650 700 750 770 790 810 830 850 870 900 940 980 1000 1010 1020 1030 1035 1040 1045 1050 1065 1080 1110 1180 42.67 67.81 89.12 88.93 91.58 92.08 92.15 91.84 90.76 90.26 90.41 90.01 89.92 90.77 91.52 92.26 93.18 93.88 95.27 95.93 96.39 96.88 98.29 99.29 98.74 0.0247 0.0165 0.0236 0.0171 0.0166 0.0155 0.0152 0.0172 0.0163 0.0166 0.0165 0.0138 0.0143 0.0159 0.0156 0.0162 0.0151 0.0148 0.0149 0.0142 0.0143 0.0129 0.0147 0.0145 0.0156 0.0133 0.0019 0.0047 0.0116 0.0016 0.0030 0.0037 0.0062 0.0095 0.0129 0.0103 0.0100 0.0043 0.0042 0.0040 0.0070 0.0062 0.0073 0.0133 0.0129 0.0171 0.0238 0.0470 0.1310 0.0421 1.100 0.324 2.072 0.289 0.240 0.345 0.182 0.259 0.118 0.214 0.140 0.133 0.062 0.034 0.044 0.050 0.004 0.064 0.111 0.123 0.143 0.093 0.119 0.165 0.078 39.40 66.83 82.97 88.06 90.85 91.04 91.58 91.06 90.39 89.61 89.97 89.59 89.71 90.65 91.36 92.09 93.15 93.66 94.92 95.55 95.94 96.58 97.92 98.79 98.49 1.86 4.09 8.27 12.28 9.09 5.28 3.25 3.08 1.93 1.50 1.68 2.55 5.14 6.53 5.35 5.80 5.07 4.31 3.06 2.16 1.53 1.28 1.09 1.25 2.57 92.40 98.60 93.10 99.00 99.20 98.90 99.40 99.20 99.60 99.30 99.50 99.60 99.80 99.90 99.90 99.80 99.90 99.80 99.70 99.60 99.60 99.70 99.60 99.50 99.80 39.3 277 110 45.0 329 173 142 84.2 55.2 40.4 50.9 52.5 121 125 132 74.8 84.5 72.0 39.3 40.5 30.7 21.9 11.1 3.99 12.4 442 1020 585 903 977 1280 1270 885 985 958 949 1860 1520 1040 1110 972 1220 1330 1340 1630 1630 2730 1390 1520 1120 891 1325 1538 1600 1634 1636 1642 1636 1628 1619 1623 1619 1620 1631 1640 1648 1661 1667 1681 1688 1693 1700 1716 1725 1722 Integrated 89.91 0.0166 0.0098 0.334 88.90 100 98.88 53.5 1010 1611 0.20 6.80 6.90 11.33 10.21 5.72 2.82 2.20 2.06 96.30 99.20 88.80 100.30 99.50 99.80 99.80 99.50 99.50 7.26 3480 162 4300 203 499 498 9580 344 4990 260 7020 133 5190 130 >10000 120 3160 1371 1375 1377 1383 1398 1386 1399 1384 1380 ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± 5 3 3 6 2 3 4 4 5 6 6 4 3 3 3 3 3 3 4 5 6 7 8 7 4 ST-5 biotite Run #57L38m (J = 0.014936 wt. = 1.70mg) 560 600 635 670 700 730 760 790 820 79.10 77.18 86.40 76.92 78.79 77.56 78.64 77.67 77.40 0.0141 0.0124 0.0274 0.0112 0.0121 0.0116 0.0119 0.0111 0.0127 0.0720 0.0032 0.0026 0.0011 0.0015 0.0020 0.0039 0.0040 0.0044 0.986 0.207 3.279 0.184 0.136 0.048 0.066 0.131 0.143 76.17 76.54 76.69 77.14 78.36 77.39 78.42 77.26 76.95 ± 23 ± 3 ± 4 ± 3 ± 3 ± 4 ± 6 ± 6 ± 6 850 880 900 915 930 945 960 975 990 1000 1015 1030 1050 1070 1100 1200 1350 78.34 77.44 77.47 77.02 77.45 77.42 77.75 77.93 79.05 79.23 79.10 79.53 80.68 80.18 81.27 93.05 128.0 0.0109 0.0114 0.0119 0.0116 0.0116 0.0115 0.0115 0.0128 0.0112 0.0117 0.0110 0.0116 0.0125 0.0111 0.0118 0.0275 0.0495 0.0015 0.0016 0.0030 0.0025 0.0005 0.0010 0.0028 0.0005 0.0017 0.0036 0.0029 0.0001 0.0055 0.0062 0.0037 0.0661 0.6535 0.057 0.071 0.071 0.034 0.028 0.026 0.025 0.045 0.031 0.088 0.031 0.007 0.161 0.077 0.272 2.765 13.65 78.15 77.21 77.23 76.89 77.34 77.31 77.65 77.78 78.93 78.94 78.99 79.48 80.18 79.93 80.45 84.86 87.70 2.22 4.29 4.60 4.16 4.99 6.16 5.86 4.57 3.74 2.61 2.44 1.78 1.78 1.40 0.96 0.14 0.08 99.80 99.70 99.70 99.90 99.90 99.90 99.90 99.80 99.90 99.70 99.90 100.00 99.40 99.70 99.00 91.20 68.50 Integrated 78.59 0.0128 0.0029 0.298 77.68 100 98.85 356 >10000 320 >10000 173 5410 206 7120 978 6770 502 7600 185 7520 1010 2730 312 >10000 145 7190 183 >10000 871 6640 95.8 3640 84.0 >10000 143 >10000 7.91 454 0.800 402 181 3480 ± 5 ± 4 ± 4 ± 4 ± 4 ± 4 ± 4 ± 4 ± 6 ± 5 ± 5 ± 8 ± 6 ± 6 ± 8 ± 55 ± 85 1390 “1388 ± 4” (71% of 39Ar) Plateau: 670 - 975°C 1395 1384 1384 1380 1385 1385 1389 1391 1405 1405 1406 1412 1420 1417 1424 1477 1510 IN-12 biotite Run #55B20m (J = 0.007388 wt. = 1.77mg) 500 600 630 660 685 700 710 720 730 750 770 790 820 880 910 925 940 955 970 980 990 1000 1020 1040 1100 1175 1250 1400 165.8 117.7 195.7 212.4 233.4 225.2 227.2 229.7 229.7 226.7 223.7 223.1 221.7 222.1 232.1 230.4 229.5 230.2 234.0 232.7 230.9 233.2 232.8 233.8 234.3 239.9 244.5 243.4 0.1817 0.0202 0.0150 0.0157 0.0304 0.0117 0.0152 0.0130 0.0130 0.0125 0.0130 0.0131 0.0130 0.0127 0.0133 0.0142 0.0145 0.0116 0.0136 0.0143 0.0131 0.0145 0.0132 0.0134 0.0132 0.0199 0.0240 0.0188 1.455 0.0201 0.0095 0.2763 0.1203 0.1253 0.2457 0.0296 0.0372 0.1309 0.1148 0.0403 0.1035 0.3237 0.3130 0.2413 0.2963 0.4036 0.0562 0.1072 0.1708 0.2242 0.3865 0.2536 0.1430 0.3680 0.3099 0.0395 38.13 1.206 0.595 0.448 5.940 0.439 0.287 0.248 0.224 0.294 0.536 0.532 0.415 0.380 0.242 0.331 0.189 0.104 0.394 0.567 0.950 1.072 1.138 1.099 0.922 4.489 5.111 3.290 53.27 114.1 193.9 211.1 215.9 223.9 226.4 228.9 229.1 225.8 222.1 221.5 220.4 221.0 231.4 229.4 229.0 229.9 232.8 231.0 228.1 230.1 229.5 230.6 231.6 226.7 229.4 233.6 0.25 3.18 4.51 6.38 7.12 6.27 4.59 3.34 2.50 2.20 1.86 1.89 3.40 8.74 9.31 8.10 7.13 5.86 3.52 1.96 1.19 0.86 0.95 1.10 1.54 0.51 0.54 1.19 32.10 97.00 99.10 99.40 92.50 99.40 99.60 99.70 99.70 99.60 99.30 99.30 99.40 99.50 99.70 99.60 99.80 99.90 99.50 99.30 98.80 98.60 98.60 98.60 98.80 94.50 93.80 96.00 52.6 724 1690 1270 615 >10000 1340 2930 2950 4620 4420 3810 3570 4420 2570 1900 1540 8340 2550 2090 9280 3120 >10000 9210 8100 7800 1460 2910 599 1103 1604 1696 1720 1761 1773 1786 1787 1771 1752 1749 1744 1747 1798 1789 1787 1791 1805 1796 1782 1792 1789 1794 1799 1775 1788 1809 Integrated 222.9 0.0155 0.2038 0.983 220.1 100 98.71 1800 1742 1.79 6.30 10.85 90.30 98.77 99.26 14.19 1289 23.76 >10000 23.10 >10000 ± 34 ± 5 ± 4 ± 8 ± 10 ± 9 ± 11 ± 5 ± 6 ± 6 ± 7 ± 6 ± 5 ± 6 ± 7 ± 8 ± 9 ± 9 ± 6 ± 7 ± 10 ± 9 ± 9 ± 9 ± 7 ± 14 ± 10 ± 9 IN-12 biotite Run #55B8n (J = 0.007498 wt. = 17.40mg) 500 575 625 78.42 157.5 211.0 0.0196 0.0101 0.0070 0.0368 0.0220 0.0226 2.567 0.6460 0.5199 70.81 155.5 209.4 768 ± 3 1395 ± 3 1703 ± 6 650 675 700 775 850 900 925 950 975 1000 1050 1150 1250 221.2 225.7 223.5 217.7 218.0 226.6 227.1 230.1 230.6 231.8 228.5 228.8 236.2 0.0086 0.0053 0.0067 0.0081 0.0048 0.0046 0.0074 0.0055 0.0047 0.0058 0.0050 0.0109 0.0193 0.0307 0.0310 0.0257 0.0431 0.0271 0.0266 0.0263 0.0301 0.0328 0.0468 0.0738 0.1410 0.2578 0.2358 0.1484 0.0938 0.2027 0.1386 0.1540 0.1547 0.1087 0.1075 0.2764 0.3168 0.2067 1.524 220.5 225.3 223.2 217.0 217.6 226.1 226.6 229.8 230.3 231.0 227.6 228.2 231.7 10.25 7.73 5.41 3.48 8.73 8.39 12.28 11.02 7.83 2.52 2.02 1.13 0.26 99.67 99.80 99.87 99.71 99.80 99.79 99.79 99.85 99.85 99.64 99.58 99.73 98.09 17.00 16.84 20.30 12.13 19.31 19.65 19.84 17.38 15.93 11.16 7.08 3.71 2.03 >10000 >10000 >10000 >10000 >10000 >10000 >10000 >10000 >10000 >10000 >10000 >10000 922 1760 1785 1775 1743 1746 1789 1792 1807 1810 1813 1796 1799 1817 Integrated 217.0 0.0068 0.0316 0.2750 216.2 100 99.62 16.5 >10000 1739 0.27 0.88 1.43 1.47 1.40 2.30 7.44 10.91 8.51 5.11 2.67 1.79 1.72 2.20 3.00 5.74 7.84 7.19 7.84 9.33 4.17 1.88 1.63 1.57 1.35 0.35 61.40 98.50 98.90 99.20 98.80 87.20 97.80 99.50 99.70 99.20 99.40 99.60 99.40 99.60 99.70 99.60 99.70 99.90 99.70 99.90 99.70 99.80 99.60 99.60 99.50 97.30 25.3 236 1510 1870 1900 459 1540 1880 >10000 2180 4370 2880 >10000 9160 7250 3310 3070 3300 >10000 3350 1760 9450 >10000 6570 2240 5800 782 1401 1600 1591 1557 1536 1575 1604 1599 1596 1595 1585 1580 1570 1577 1588 1597 1597 1597 1587 1600 1600 1592 1590 1594 1638 100 99.12 1980 1588 ± ± ± ± ± ± ± ± ± ± ± ± ± 6 6 6 6 6 6 6 6 6 6 6 6 4 IN-24 biotite Run #55B19m (J = 0.007418 wt. = 2.09mg) 500 550 580 600 620 635 650 665 680 700 720 750 780 810 840 965 885 900 915 935 950 970 1000 1040 1100 1200 119.1 160.8 194.5 192.3 186.9 207.7 192.1 193.9 192.8 193.2 192.6 190.4 190.0 187.8 188.8 190.9 192.4 192.1 192.4 190.3 192.9 192.9 191.8 191.3 192.3 204.8 0.2461 0.0345 0.0156 0.0145 0.0150 0.0391 0.0169 0.0141 0.0115 0.0144 0.0126 0.0131 0.0121 0.0118 0.0118 0.0129 0.0129 0.0125 0.0114 0.0125 0.0142 0.0116 0.0117 0.0121 0.0138 0.0153 1.794 0.0086 0.5067 0.1675 0.3326 0.3442 0.5486 0.3308 0.3859 1.082 0.0324 0.2503 0.3430 0.2829 0.2108 0.7393 0.4975 0.4801 0.2771 0.3779 1.185 0.0141 0.4077 0.4042 0.4157 1.073 15.61 0.824 0.723 0.513 0.757 9.017 1.412 0.304 0.196 0.580 0.362 0.257 0.410 0.246 0.173 0.255 0.196 0.082 0.204 0.077 0.214 0.152 0.271 0.278 0.355 1.862 73.20 158.3 192.4 190.8 184.7 181.1 188.0 193.1 192.3 191.7 191.5 189.7 188.8 187.1 188.3 190.3 191.9 192.0 191.8 190.1 192.5 192.5 191.1 190.5 191.3 199.5 Integrated 191.9 0.0146 0.4610 0.593 190.2 “1593 ± 5” (92% of 39Ar) Plateau: 650 - 1100°C ± 25 ± 8 ± 7 ± 8 ± 7 ± 6 ± 10 ± 7 ± 9 ± 14 ± 5 ± 7 ± 6 ± 6 ± 4 ± 11 ± 9 ± 8 ± 9 ± 9 ± 14 ± 5 ± 7 ± 7 ± 7 ± 21 IN-24 biotite Run #55B7n (J = 0.007482 wt. = 17.10mg) 500 550 600 625 650 675 750 850 875 84.56 176.8 194.4 194.5 192.2 192.3 189.9 185.6 190.6 0.0759 0.0081 0.0054 0.0092 0.0066 0.0037 0.0097 0.0087 0.0063 0.0525 0.0330 0.0238 0.0321 0.0231 0.0185 0.0299 0.0193 0.0182 2.052 0.9038 0.3114 0.8143 0.1241 0.1605 0.3756 0.2633 0.2784 78.48 174.2 193.5 192.0 191.8 191.8 188.8 184.8 189.8 1.30 2.52 5.64 5.67 16.84 8.37 3.88 6.22 5.70 92.81 98.48 99.51 98.75 99.80 99.74 99.40 99.57 99.56 9.96 15.85 21.96 16.29 22.64 28.24 17.46 27.03 28.70 85.2 >10000 >10000 >10000 >10000 >10000 >10000 >10000 >10000 833 1505 1615 1607 1605 1605 1589 1566 1594 ± ± ± ± ± ± ± ± ± 5 5 5 5 5 5 5 5 5 900 925 950 975 1000 1050 1250 1400 191.0 190.6 190.4 190.6 190.1 194.0 193.7 178.5 0.0042 0.0067 0.0057 0.0053 0.0047 0.0058 0.0041 0.1475 0.0207 0.0104 0.0111 0.0291 0.0880 0.0346 0.0221 0.6116 0.1488 0.2130 0.1219 0.2190 0.3644 0.4930 0.4191 6.016 190.6 189.9 190.0 189.9 189.0 192.5 192.4 160.8 10.47 6.13 10.23 8.10 2.25 2.37 4.07 0.24 99.76 99.66 99.80 99.65 99.42 99.24 99.35 90.06 25.28 50.22 46.96 17.97 5.94 15.12 23.61 0.85 >10000 >10000 >10000 >10000 >10000 >10000 >10000 41.6 1599 1595 1595 1595 1590 1609 1609 1425 Integrated 189.6 0.0073 0.0250 0.3046 188.7 100 99.51 20.9 >10000 1588 0.03 0.12 0.38 0.86 1.71 1.91 1.65 4.01 13.94 9.02 3.65 1.97 1.72 1.69 2.14 2.61 4.70 7.26 10.31 18.16 5.86 1.49 1.33 1.20 1.09 0.74 0.34 0.09 0.01 14.20 38.60 92.40 96.60 98.60 99.30 97.80 84.20 99.70 99.90 99.80 99.10 98.60 99.10 99.40 99.50 99.80 99.80 99.50 99.90 99.30 99.50 99.50 98.90 99.30 98.80 95.20 77.30 22.50 10.9 22.6 41.0 116 483 1180 1280 300 >10000 1680 6430 1960 >10000 1940 1870 1900 4540 >10000 1560 1790 4820 9800 6030 >10000 7440 1350 729 121 624 621 582 858 1397 1606 1601 1517 1482 1583 1613 1605 1595 1591 1605 1579 1592 1605 1602 1605 1597 1576 1593 1594 1596 1601 1597 1606 1575 1242 100 98.73 1290 1586 ± ± ± ± ± ± ± ± 5 5 5 5 5 5 5 9 IN-25 biotite Run #55B18m (J = 0.007443 wt. = 1.19mg) 350 400 500 550 600 625 650 675 700 720 740 760 780 800 825 850 875 900 925 950 975 1000 1025 1050 1075 1100 1150 1200 1250 385.2 132.1 88.45 162.7 195.5 193.2 181.1 203.2 189.3 194.4 193.2 192.5 192.7 194.5 189.1 191.2 193.1 192.5 193.6 191.4 188.7 191.5 191.7 193.2 193.4 193.7 202.3 241.7 565.1 Integrated 191.7 0.6961 0.2934 0.1424 0.0594 0.0233 0.0161 0.0175 0.0486 0.0113 0.0141 0.0119 0.0145 0.0126 0.0147 0.0144 0.0142 0.0121 0.0116 0.0148 0.0139 0.0129 0.0120 0.0123 0.0125 0.0124 0.0162 0.0243 0.0892 0.3073 0.0165 12.14 112.1 4.298 27.56 2.076 2.332 0.0337 1.889 0.4498 0.909 0.1579 0.460 0.3151 1.379 0.0415 10.86 0.5068 0.194 0.5812 0.107 0.1958 0.145 0.3426 0.569 0.2628 0.888 0.6934 0.632 0.3644 0.405 0.3938 0.322 0.1191 0.109 1.124 0.179 0.6176 0.320 0.4181 0.082 1.130 0.488 0.1849 0.342 0.0712 0.336 0.4446 0.746 0.2518 0.491 0.2232 0.815 1.868 3.301 3.940 18.68 69.65 149.9 0.5314 0.847 55.23 51.11 81.81 157.1 192.8 191.9 177.1 171.1 188.8 194.2 192.8 190.9 190.1 192.8 188.0 190.3 192.7 192.2 192.8 191.2 187.5 190.5 190.7 191.0 192.0 191.3 192.9 187.2 133.1 189.2 “1596 ± 6” (89% of 39Ar) Plateau: 700 - 1100°C ±504 ± 69 ± 17 ± 12 ± 7 ± 6 ± 7 ± 6 ± 7 ± 9 ± 6 ± 8 ± 8 ± 7 ± 6 ± 6 ± 5 ± 9 ± 7 ± 6 ± 11 ± 10 ± 9 ± 10 ± 11 ± 13 ± 22 ± 76 ±1369 IN-25 biotite Run #55B6n (J = 0.007465 wt. = 24.70mg) 500 600 650 700 750 800 850 900 1000 1050 1100 74.51 159.9 193.3 190.4 191.0 190.2 192.1 190.1 189.1 189.2 189.9 0.0815 0.0115 0.0088 0.0094 0.0081 0.0061 0.0011 0.0060 0.0096 0.0071 0.0093 0.0831 0.0337 0.0306 0.0342 0.0380 0.0442 0.0185 0.0330 0.0240 0.0325 0.0417 2.7879 0.4860 0.3628 0.1722 0.1212 0.1652 0.6032 0.1496 0.0867 0.1337 0.2965 66.26 158.4 192.3 189.9 190.6 189.7 190.3 189.7 188.7 188.7 189.6 0.68 2.74 4.91 18.49 15.93 5.83 3.24 9.18 25.55 9.36 2.67 88.93 99.09 99.43 99.72 99.80 99.73 99.06 99.76 99.85 99.78 99.53 6.29 15.5 17.1 15.3 13.8 11.8 28.3 15.9 21.8 16.1 12.6 79.8 >10000 >10000 >10000 >10000 >10000 >10000 >10000 >10000 >10000 >10000 725 1408 1605 1592 1596 1591 1594 1591 1586 1586 1587 ± ± ± ± ± ± ± ± ± ± ± 5 5 5 5 5 5 5 5 5 5 5 1150 1225 185.5 184.2 0.0139 0.0176 0.0609 0.1642 1.1445 1.7667 182.2 179.0 0.92 0.50 98.17 97.16 Integrated 188.5 0.0089 0.0332 0.2061 187.9 100 99.66 8.58 3.18 5230 1480 15.73 >10000 (92% of 39Ar) Plateau: 650 - 1100°C 1549 ± 5 1531 ± 5 1582 1591 ± 5 IN-21 biotite Run #55B21m (J = 0.007363 wt. = 1.29mg) 500 550 580 600 620 640 660 675 785 690 720 750 780 810 840 870 900 920 940 960 980 1000 1025 1050 1100 1200 1350 91.17 135.4 188.7 196.3 193.2 208.2 217.4 195.1 193.3 195.4 186.4 188.8 190.6 188.8 186.8 190.6 191.3 191.8 190.5 190.0 192.2 189.0 188.0 188.3 193.2 196.2 240.2 Integrated 191.4 0.3380 0.0195 0.0156 0.0126 0.0133 0.0387 0.0380 0.0147 0.0153 0.0144 0.0150 0.0131 0.0125 0.0135 0.0134 0.0127 0.0140 0.0123 0.0130 0.0129 0.0148 0.0148 0.0129 0.0167 0.0147 0.0160 0.0615 0.2131 0.5452 0.3496 0.3620 0.3726 0.3311 0.2182 0.2431 0.1776 0.7763 1.652 0.3677 0.0300 0.0315 0.1052 0.1369 0.2794 0.2540 0.5570 0.1426 0.1468 0.3836 0.3106 0.5976 0.2973 1.476 4.821 14.74 0.983 0.655 0.432 0.438 9.453 11.18 1.067 1.033 1.291 1.005 0.574 0.390 0.535 0.341 0.199 0.266 0.106 0.140 0.207 1.231 0.725 0.233 0.615 0.635 2.426 16.23 47.65 132.6 186.8 195.1 191.9 180.3 184.3 192.0 190.3 191.7 183.7 187.2 189.4 187.2 185.8 190.1 190.6 191.5 190.1 189.4 188.6 186.9 187.3 186.5 191.4 189.3 193.1 0.0178 0.2948 1.352 187.4 0.63 2.42 3.34 3.94 3.84 3.75 4.52 6.13 3.21 0.21 0.30 0.60 1.10 1.93 3.36 6.57 12.96 20.45 7.21 4.80 2.51 1.01 1.53 1.29 1.72 0.52 0.14 52.30 97.90 99.00 99.40 99.30 86.60 84.80 98.40 98.40 98.10 98.50 99.10 99.40 99.20 99.50 99.70 99.60 99.80 99.80 99.70 98.10 98.90 99.60 99.10 99.00 96.40 80.20 17.4 767 1460 5130 3220 516 842 2700 2030 4700 2400 4420 5310 2960 2690 3360 1940 4130 2720 3100 3140 1950 3200 1110 1920 9620 264 543 1229 1561 1607 1589 1524 1547 1590 1580 1588 1543 1563 1575 1563 1555 1579 1582 1587 1579 1575 1571 1561 1564 1559 1586 1575 1596 100 97.93 1180 1564 2.47 6.31 14.35 13.40 9.88 7.33 8.43 15.40 16.08 3.10 3.02 0.23 94.33 99.54 99.45 99.84 99.75 99.80 99.78 99.79 99.80 99.80 99.67 95.94 3.05 24.72 19.61 21.94 13.06 20.05 24.24 19.34 15.66 6.39 7.80 0.78 49 >10000 >10000 >10000 >10000 >10000 >10000 >10000 >10000 127 >10000 289 665 1547 1606 1609 1591 1562 1592 1599 1591 1539 1555 1589 100 99.67 14.56 >10000 1571 1.94 40.40 ± 6 ± 7 ± 5 ± 5 ± 6 ± 6 ± 6 ± 4 ± 5 ± 30 ± 18 ± 18 ± 11 ± 7 ± 5 ± 5 ± 7 ± 5 ± 9 ± 5 ± 7 ± 11 ± 9 ± 9 ± 8 ± 18 ± 46 IN-21 biotite Run #55B9n (J = 0.007500 wt. = 20.40mg) 500 600 650 700 775 850 900 950 1000 1050 1150 1250 63.0 181.8 192.4 192.1 189.1 183.8 189.4 190.4 189.0 179.9 183.0 196.2 0.1180 0.0075 0.0077 0.0054 0.0074 0.0047 0.0055 0.0057 0.0082 0.0518 0.0077 0.0339 0.1715 0.0211 0.0267 0.0238 0.0400 0.0261 0.0216 0.0270 0.0334 0.0818 0.0670 0.6688 1.208 0.2740 0.3517 0.0936 0.1513 0.1176 0.1337 0.1284 0.1226 0.1179 0.1960 2.707 59.47 180.9 191.4 191.8 188.7 183.5 188.9 190.0 188.7 179.6 182.4 188.3 Integrated 185.8 0.0109 0.0359 0.2003 185.2 ± ± ± ± ± ± ± ± ± ± ± ± 3 5 5 5 5 5 5 5 5 5 5 6 T-27A biotite Run #57L30m (J = 0.015057 wt. = 0.90mg) 580 96.42 0.0823 0.0029 19.45 38.93 181 149 832 ± 22 620 650 675 700 725 750 780 810 850 880 900 915 930 945 960 975 990 1000 1015 1030 1050 1070 1100 1200 93.06 124.6 84.86 88.98 89.54 85.05 87.16 87.73 86.34 86.09 86.17 85.45 85.11 86.27 85.62 86.59 86.82 90.45 86.47 88.83 89.03 91.59 92.23 103.4 0.0421 0.0703 0.0220 0.0220 0.0200 0.0182 0.0202 0.0181 0.0187 0.0182 0.0193 0.0181 0.0178 0.0186 0.0178 0.0153 0.0185 0.0142 0.0142 0.0148 0.0126 0.0146 0.0161 0.0174 0.0280 0.0180 0.0118 0.0132 0.0195 0.0196 0.0125 0.0237 0.0209 0.0108 0.0111 0.0116 0.0623 0.0156 0.0104 0.0169 0.0254 0.0311 0.0431 0.0384 0.0668 0.1806 0.1268 0.2292 6.360 15.83 0.853 1.410 1.510 0.387 0.575 0.501 0.293 0.198 0.119 0.097 0.114 0.106 0.162 0.191 0.272 0.295 0.374 0.358 0.856 0.871 1.960 2.110 74.24 77.83 82.31 84.78 85.05 83.88 85.44 86.23 85.45 85.49 85.79 85.14 84.75 85.93 85.12 86.00 85.99 89.55 85.35 87.75 86.48 89.02 86.43 97.19 3.01 2.88 5.19 4.11 3.59 3.73 4.43 4.79 6.74 9.96 9.95 9.30 6.99 6.17 4.10 3.36 2.60 1.82 1.61 1.12 0.86 0.63 0.54 0.60 79.80 62.50 97.00 95.30 95.00 98.70 98.10 98.30 99.00 99.30 99.60 99.70 99.60 99.60 99.40 99.40 99.10 99.00 98.70 98.80 97.20 97.20 93.70 94.00 18.7 269 27.5 175 44.3 542 39.6 609 26.8 817 26.7 779 41.8 625 22.1 817 25.0 708 48.4 740 47.1 629 45.1 730 38.4 767 33.5 684 50.5 776 30.9 1250 20.6 723 16.8 1820 12.1 1920 13.6 1560 7.83 >10000 2.90 2400 4.12 3200 2.28 1980 1354 1399 1454 1484 1487 1473 1492 1501 1492 1493 1496 1488 1484 1498 1488 1499 1499 1540 1491 1519 1504 1534 1504 1626 Integrated 88.11 0.0219 0.0223 1.390 83.98 100 95.31 23.5 1475 611 “1493 ± 5” (68% of 39Ar) Plateau: 780 - 990°C ± 10 ± 12 ± 6 ± 7 ± 6 ± 12 ± 7 ± 5 ± 5 ± 4 ± 4 ± 4 ± 9 ± 5 ± 8 ± 7 ± 9 ± 15 ± 13 ± 14 ± 17 ± 23 ± 26 ± 25 KB-2 biotite Run #57L5m (J = 0.014852 wt. = 1.10mg) 500 600 700 730 760 790 820 850 880 910 940 970 1000 1030 1060 1090 1120 1180 1230 1300 1400 1500 1600 100.8 47.78 86.38 92.51 91.14 90.56 90.38 90.48 91.02 91.47 92.75 91.89 92.69 94.11 94.63 93.76 96.42 99.37 135.4 144.9 177.5 495.2 1560 0.2001 0.0247 0.0278 0.0211 0.0216 0.0215 0.0216 0.0203 0.0212 0.0204 0.0195 0.0199 0.0194 0.0190 0.0221 0.0246 0.0249 0.0285 0.0443 0.0223 0.1004 0.1966 0.5899 0.0593 30.28 0.0074 0.543 0.0041 1.038 0.0003 0.302 0.0077 0.248 0.0112 0.313 0.0095 0.316 0.0078 0.257 0.0055 0.166 0.0055 0.109 0.0043 0.099 0.0056 0.100 0.0057 0.086 0.0098 0.100 0.0164 0.227 0.0317 0.295 0.0317 0.594 0.0578 2.525 0.0709 11.97 0.1317 12.00 0.1485 28.10 0.5942 114.4 2.277 446.4 Integrated 86.88 0.0240 0.0072 0.697 11.36 46.15 83.29 91.60 90.38 89.61 89.42 89.70 90.51 91.12 92.43 91.57 92.41 93.79 93.94 92.87 94.64 91.89 99.98 109.4 94.48 157.2 241.1 0.51 9.07 27.55 9.01 4.55 3.21 2.96 3.92 4.31 5.79 6.68 6.34 6.31 5.18 1.95 0.99 0.99 0.45 0.08 0.07 0.06 0.02 0.01 11.30 96.60 96.40 99.00 99.20 99.00 99.00 99.20 99.50 99.60 99.70 99.70 99.70 99.70 99.30 99.10 98.20 92.50 73.90 75.50 53.20 31.70 15.40 8.81 70.8 128 1500 68.2 46.6 55.2 67.1 94.9 95.9 121 93.3 91.6 53.1 31.9 16.5 16.5 9.04 7.37 3.97 3.52 0.880 0.229 84.80 100 97.60 72.9 0.36 22.30 11.0 39.4 404 347 533 504 517 508 575 517 555 612 584 614 651 478 393 402 402 472 472 142 178 20.0 281 942 1453 1549 1536 1527 1524 1528 1537 1544 1559 1549 1559 1574 1576 1564 1584 1553 1642 1741 1582 2173 2745 438 1471 ± 55 ± 3 ± 5 ± 4 ± 6 ± 5 ± 6 ± 5 ± 6 ± 5 ± 4 ± 4 ± 5 ± 4 ± 7 ± 13 ± 12 ± 24 ±113 ±109 ±176 ±995 ±7178 SI-23 biotite Run #57L8m (J = 0.014960 wt. = 1.20mg) 500 129.4 0.1993 0.0476 34.01 28.90 41.9 648 ± 64 580 630 660 690 710 730 750 770 790 810 830 850 870 900 930 960 990 1020 1050 1080 1120 1180 1250 1500 66.04 69.94 77.03 69.10 69.94 69.77 69.64 69.30 68.81 69.75 70.86 71.95 70.72 70.14 69.00 69.31 70.44 69.91 70.67 70.57 71.33 79.35 90.28 85.79 0.0158 0.0167 0.0246 0.0125 0.0131 0.0127 0.0131 0.0135 0.0128 0.0122 0.0134 0.0139 0.0142 0.0139 0.0131 0.0121 0.0128 0.0126 0.0124 0.0160 0.0097 0.0198 0.0117 0.0106 0.0150 0.0073 0.0045 0.0032 0.0026 0.0029 0.0023 0.0026 0.0037 0.0060 0.0084 0.0212 0.0134 0.0078 0.0050 0.0070 0.0014 0.0075 0.0163 0.0276 0.0172 0.2690 0.3780 0.0564 0.422 0.913 2.810 0.095 0.074 0.161 0.156 0.110 0.110 0.204 0.477 0.958 0.537 0.409 0.119 0.217 0.449 0.190 0.460 0.915 0.539 5.910 3.470 5.404 64.77 67.21 68.69 68.80 69.70 69.27 69.15 68.95 68.46 69.13 69.42 69.09 69.11 68.90 68.62 68.65 69.09 69.32 69.29 67.84 69.71 61.88 80.00 69.80 3.75 10.38 7.58 10.69 8.60 8.50 10.30 6.77 5.09 2.68 1.51 1.23 1.48 2.39 3.44 3.73 4.10 3.12 1.89 0.98 0.87 0.16 0.12 0.27 98.10 96.10 89.20 99.60 99.70 99.30 99.30 99.50 99.50 99.10 98.00 96.10 97.80 98.30 99.50 99.10 98.10 99.20 98.10 96.20 97.80 78.00 88.60 81.40 34.9 71.4 116 162 200 179 231 201 142 86.7 62.3 24.7 39.0 66.8 104 74.8 376 69.7 32.1 18.9 30.4 1.94 1.46 9.27 1230 1240 611 3360 2380 3210 2560 2070 2860 4990 3010 3930 2160 2210 2480 5670 4400 3550 6840 1490 2530 2480 180 505 1222 1255 1275 1277 1289 1283 1281 1279 1272 1281 1285 1281 1281 1278 1274 1275 1281 1284 1283 1264 1289 1182 1420 1290 Integrated 70.44 0.0150 0.0062 0.635 68.54 100 97.30 84.1 1750 1273 ± 5 ± 4 ± 4 ± 3 ± 3 ± 4 ± 3 ± 4 ± 5 ± 7 ± 8 ± 11 ± 9 ± 7 ± 5 ± 5 ± 5 ± 6 ± 8 ± 12 ± 13 ± 57 ± 65 ± 35 Plateau: 660 – 1050°C (83% of 39Ar) “1280 ± 4” _________________________________________________________________________________________________ a Temperature in °C measured with a thermocouple on the outside of the Ta furnace crucible. b The isotope ratios given are not corrected for Ca, K and Cl derived Ar isotopic interference but, 37Ar is corrected for decay using a half-life of 35.1 days. The ratios are corrected for line blanks. c F is the ratio of radiogenic 40Ar to K-derived 39Ar. It is corrected for atmospheric argon and other nuclear reactions using the following factors: (40Ar/36Ar)air = 295.5 (38Ar/39Ar) = 0.01185 = 3.50 x 10-5 2.018 x 10-6 per day after irradiation. K (38Ar/37Ar)Ca (36Ar/38Ar)Cl (39Ar/37Ar)Ca = = = = = (36Ar/37Ar) Ca (40Ar/39Ar)K = = = = = = = = 6.630. x 10-4 6.630 x 10-4 6.715 x 10-4 6.836 x 10-4 2.372. x 10-4 2.372 x 10-4 2.643 x 10-4 3.116 x 10-4 0.02516 0.02516 0.02422 0.03039 for run numbers starting with 55 for run numbers starting with 57 for run numbers starting with 62 for run numbers starting with 71 for run numbers starting with 55 for run numbers starting with 57 for run numbers starting with 62 for run numbers starting with 71 for run numbers starting with 55 for run numbers starting with 57 for run numbers starting with 62 for run numbers starting with 71 d Relative percent of the total 39Ar released in the fraction. e Percent of the total 40Ar in the fraction that is radiogenic. f Weight ratio calculated using the relationship: K/Ca = 0.523 x (39Ar K/37Ar Ca). g Weight ratio calculated using the relationship: K/Cl = 5.22 x (39Ar K/38ArCl). h Ages calculated with a total decay constant of 5.543 x 10-10 y-1. “Integrated” indicates the calculated values for all fractions combined. All uncertainties are given at the 1-sigma level. For increments of a step-heating analysis, the uncertainties do not include any J value uncertainty. An age plateau is defined as contiguous fractions constituting a majority (>50%) of the 39Ar released where the apparent-age variations among fractions may be accounted for with analytical uncertainties. A plateau encompasses as many fractions as possible (except where fraction uncertainties are very large) where ages agree with the plateau within their ± 2-sigma uncertainties. Where this strict definition is not observed and variation among "plateau" fractions is minor but still exceeds analytical uncertainties, an approximate or "near" plateau is defined. In these cases, the indicated "plateau" age is enclosed in quotation marks. For the plateau age, the uncertainty reflects a relative uncertainty of ± 0.25% in J value. An overall systematic uncertainty of ± 1% assigned to all ages to allow for uncertainty in the monitor age. The monitor used was a intralaboratory biotite standard (“AL-1”) that has a 40Ar/39Ar age of 443.5 Ma; an uncertainty of ± 1% is assigned to this age in order to allow for uncertainties in the standards against which AL-1 was calibrated. The age for this monitor was determined by simultaneous cross calibration with several monitors including the Fish Canyon Tuff biotite standard (FCT-3) with an age of 27.84 Ma. _______________________________________________________________________________________________
