Relative isotopic abundances | Derived results | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lab ID no. | J | 40 Ar | 39 Ar | 38 Ar | 37 Ar | 36 Ar | 39 Ar Mol | Ca/K | % 40 Ar * | Age (Ma) | |||||||
(×10 −3 )±1σ | ±1σ | ±1σ | ±1σ | ±1σ | ±1σ | ×10 −14 | ±1σ | ||||||||||
FCS | |||||||||||||||||
84-02 | 0.2055 | 0.0003 | 56,989 | 8 | 748 | 3 | 57 | 3 | 22 | 2 | 1.27 | 0.09 | 0.025 | 0.161 | 99.4 | 27.83 | 0.10 |
84-03 | 0.2055 | 0.0003 | 96,025 | 11 | 1,239 | 3 | 87 | 3 | 26 | 2 | 1.77 | 0.09 | 0.041 | 0.116 | 99.5 | 28.32 | 0.06 |
84-04 | 0.2055 | 0.0003 | 79,364 | 11 | 1,033 | 7 | 65 | 9 | 9 | 3 | 0.56 | 0.14 | 0.034 | 0.050 | 99.8 | 28.17 | 0.20 |
84-05 | 0.2055 | 0.0003 | 36,927 | 10 | 478 | 7 | 29 | 9 | 7 | 3 | 0.14 | 0.14 | 0.016 | 0.087 | 99.9 | 28.32 | 0.42 |
84-06 | 0.2055 | 0.0003 | 70,660 | 11 | 913 | 7 | 49 | 9 | 10 | 3 | 0.87 | 0.14 | 0.030 | 0.065 | 99.6 | 28.34 | 0.22 |
87-01 | 0.1959 | 0.0003 | 60,413 | 8 | 759 | 3 | 44 | 3 | 14 | 3 | 1.99 | 0.08 | 0.025 | 0.100 | 99.0 | 27.61 | 0.10 |
87-02 | 0.1959 | 0.0003 | 63,977 | 16 | 583 | 3 | 30 | 3 | 0 | 3 | 2.47 | 0.09 | 0.019 | 0.000 | 98.9 | 33.90 | 0.18 |
87-03 | 0.1959 | 0.0003 | 54,528 | 7 | 686 | 3 | 49 | 4 | 11 | 3 | 0.83 | 0.08 | 0.023 | 0.091 | 99.6 | 27.72 | 0.14 |
87-05 | 0.1959 | 0.0003 | 103,304 | 9 | 1,264 | 3 | 77 | 2 | 0 | 2 | 3.63 | 0.09 | 0.042 | 0.000 | 99.0 | 28.32 | 0.08 |
87-06 | 0.1959 | 0.0003 | 46,783 | 10 | 581 | 7 | 36 | 8 | 4 | 3 | 0.54 | 0.13 | 0.019 | 0.043 | 99.7 | 28.10 | 0.32 |
87-07 | 0.1959 | 0.0003 | 35,618 | 9 | 445 | 7 | 33 | 8 | 1 | 4 | 0.58 | 0.13 | 0.015 | 0.011 | 99.5 | 27.91 | 0.42 |
87-09 | 0.1959 | 0.0003 | 78,316 | 11 | 969 | 7 | 55 | 8 | 8 | 3 | 1.29 | 0.14 | 0.032 | 0.045 | 99.5 | 28.17 | 0.19 |
93-01 | 0.1816 | 0.0001 | 63,628 | 8 | 724 | 2 | 37 | 3 | 5 | 2 | 1.79 | 0.09 | 0.024 | 0.038 | 99.2 | 28.28 | 0.10 |
93-02 | 0.1816 | 0.0001 | 127,664 | 12 | 1,453 | 3 | 70 | 4 | 9 | 3 | 1.53 | 0.10 | 0.048 | 0.034 | 99.7 | 28.41 | 0.07 |
93-03 | 0.1816 | 0.0001 | 108,347 | 10 | 1,228 | 3 | 65 | 4 | 7 | 2 | 0.59 | 0.09 | 0.041 | 0.034 | 99.8 | 28.59 | 0.08 |
93-04 | 0.1816 | 0.0001 | 124,168 | 11 | 1,424 | 3 | 78 | 4 | 14 | 3 | 2.15 | 0.09 | 0.047 | 0.056 | 99.5 | 28.16 | 0.07 |
93-05 | 0.1816 | 0.0001 | 51,898 | 7 | 595 | 3 | 37 | 3 | 1 | 2 | 1.06 | 0.08 | 0.020 | 0.007 | 99.4 | 28.16 | 0.15 |
93-06 | 0.1816 | 0.0001 | 100,604 | 10 | 1,167 | 3 | 77 | 3 | 13 | 3 | 0.95 | 0.09 | 0.039 | 0.064 | 99.7 | 27.90 | 0.08 |
93-07 | 0.1816 | 0.0001 | 81,501 | 9 | 935 | 5 | 52 | 3 | 3 | 3 | 0.99 | 0.08 | 0.031 | 0.019 | 99.6 | 28.18 | 0.14 |
93-08 | 0.1816 | 0.0001 | 108,398 | 9 | 1,225 | 5 | 72 | 3 | 51 | 2 | 1.04 | 0.09 | 0.041 | 0.233 | 99.7 | 28.65 | 0.11 |
93-09 | 0.1816 | 0.0001 | 100,317 | 10 | 1,154 | 3 | 78 | 3 | 8 | 3 | 3.84 | 0.09 | 0.038 | 0.037 | 98.9 | 27.91 | 0.09 |
93-10 | 0.1816 | 0.0001 | 120,283 | 10 | 1,386 | 3 | 96 | 3 | 29 | 2 | 0.72 | 0.08 | 0.046 | 0.119 | 99.8 | 28.13 | 0.06 |
93-11 | 0.1816 | 0.0001 | 89,456 | 9 | 1,022 | 3 | 77 | 3 | 25 | 3 | 2.80 | 0.09 | 0.034 | 0.139 | 99.1 | 28.16 | 0.08 |
93-12 | 0.1816 | 0.0001 | 141,018 | 12 | 1,631 | 4 | 92 | 3 | 16 | 2 | 0.31 | 0.08 | 0.054 | 0.056 | 99.9 | 28.05 | 0.06 |
Average | 28.38 | 0.47 | |||||||||||||||
ACS | |||||||||||||||||
75-01 | 0.2020 | 0.0003 | 11,629 | 11 | 3,238 | 6 | 184 | 6 | 18 | 5 | 3.14 | 0.14 | 0.108 | 0.023 | 92.0 | 1.176 | 0.006 |
75-03 | 0.2020 | 0.0003 | 4,741 | 5 | 1,419 | 4 | 76 | 3 | 14 | 2 | 0.27 | 0.09 | 0.047 | 0.047 | 98.5 | 1.169 | 0.008 |
75-04 | 0.2020 | 0.0003 | 11,887 | 4 | 3,330 | 5 | 166 | 3 | 45 | 3 | 2.44 | 0.10 | 0.111 | 0.066 | 94.0 | 1.195 | 0.004 |
75-05 | 0.2020 | 0.0003 | 11,502 | 6 | 3,112 | 4 | 172 | 4 | 5 | 3 | 3.72 | 0.11 | 0.103 | 0.007 | 90.3 | 1.189 | 0.004 |
75-06 | 0.2020 | 0.0003 | 12,491 | 5 | 3,668 | 3 | 198 | 3 | 15 | 2 | 0.90 | 0.10 | 0.122 | 0.020 | 97.9 | 1.186 | 0.003 |
75-08 | 0.2020 | 0.0003 | 16,880 | 19 | 3,793 | 7 | 215 | 6 | 17 | 6 | 14.91 | 0.30 | 0.126 | 0.022 | 73.5 | 1.170 | 0.010 |
79-01 | 0.1910 | 0.0002 | 13,275 | 12 | 3,623 | 6 | 245 | 6 | 22 | 5 | 1.48 | 0.14 | 0.120 | 0.026 | 96.8 | 1.194 | 0.005 |
79-02 | 0.1910 | 0.0002 | 13,908 | 12 | 3,866 | 6 | 209 | 6 | 25 | 5 | 0.39 | 0.14 | 0.128 | 0.027 | 99.3 | 1.202 | 0.004 |
79-03 | 0.1910 | 0.0002 | 25,059 | 10 | 6,147 | 5 | 382 | 3 | 41 | 4 | 11.51 | 0.15 | 0.204 | 0.033 | 86.3 | 1.187 | 0.003 |
79-04 | 0.1910 | 0.0002 | 17,716 | 6 | 4,857 | 5 | 275 | 3 | 37 | 4 | 1.96 | 0.10 | 0.161 | 0.037 | 96.8 | 1.189 | 0.003 |
79-05 | 0.1910 | 0.0002 | 14,645 | 5 | 3,944 | 4 | 241 | 3 | 17 | 3 | 2.89 | 0.11 | 0.131 | 0.021 | 94.2 | 1.177 | 0.003 |
79-06 | 0.1910 | 0.0002 | 7,592 | 5 | 2,118 | 5 | 130 | 5 | 14 | 4 | 0.63 | 0.10 | 0.070 | 0.032 | 97.6 | 1.178 | 0.006 |
79-07 | 0.1910 | 0.0002 | 11,883 | 6 | 3,176 | 5 | 175 | 3 | 19 | 3 | 2.72 | 0.09 | 0.105 | 0.029 | 93.2 | 1.175 | 0.004 |
79-08 | 0.1910 | 0.0002 | 10,674 | 5 | 2,921 | 3 | 207 | 3 | 18 | 2 | 1.68 | 0.10 | 0.097 | 0.031 | 95.4 | 1.173 | 0.004 |
79-09 | 0.1910 | 0.0002 | 7,120 | 6 | 1,973 | 3 | 117 | 4 | 18 | 4 | 0.33 | 0.10 | 0.066 | 0.043 | 98.8 | 1.200 | 0.006 |
83-01 | 0.1788 | 0.0002 | 21,443 | 11 | 5,512 | 7 | 415 | 6 | 35 | 4 | 3.32 | 0.14 | 0.183 | 0.027 | 95.5 | 1.172 | 0.003 |
83-02 | 0.1788 | 0.0002 | 13,561 | 12 | 3,278 | 6 | 286 | 7 | 23 | 4 | 4.76 | 0.15 | 0.109 | 0.030 | 89.6 | 1.171 | 0.005 |
83-03 | 0.1788 | 0.0002 | 18,842 | 6 | 4,812 | 5 | 305 | 4 | 26 | 3 | 1.93 | 0.11 | 0.160 | 0.026 | 97.0 | 1.199 | 0.003 |
83-04 | 0.1788 | 0.0002 | 25,856 | 5 | 6,779 | 6 | 406 | 4 | 40 | 3 | 1.77 | 0.11 | 0.225 | 0.029 | 98.1 | 1.180 | 0.002 |
83-05 | 0.1788 | 0.0002 | 27,183 | 9 | 5,713 | 7 | 489 | 6 | 24 | 5 | 19.39 | 0.31 | 0.190 | 0.021 | 78.7 | 1.186 | 0.005 |
83-06 | 0.1788 | 0.0002 | 12,743 | 9 | 3,243 | 7 | 187 | 5 | 12 | 5 | 2.09 | 0.27 | 0.108 | 0.018 | 95.1 | 1.180 | 0.008 |
83-07 | 0.1788 | 0.0002 | 12,061 | 14 | 3,075 | 6 | 174 | 6 | 13 | 5 | 2.18 | 0.27 | 0.102 | 0.021 | 94.6 | 1.172 | 0.009 |
83-08 | 0.1788 | 0.0002 | 18,775 | 18 | 4,755 | 7 | 272 | 6 | 21 | 6 | 2.12 | 0.27 | 0.158 | 0.022 | 96.7 | 1.205 | 0.006 |
83-09 | 0.1788 | 0.0002 | 17,799 | 18 | 4,521 | 7 | 269 | 6 | 18 | 6 | 1.97 | 0.27 | 0.150 | 0.020 | 96.8 | 1.202 | 0.006 |
83-10 | 0.1788 | 0.0002 | 6,962 | 17 | 1,784 | 6 | 111 | 6 | 14 | 6 | 0.44 | 0.26 | 0.059 | 0.040 | 98.2 | 1.210 | 0.015 |
Average | 1.185 | 0.004 |