Data Summary for gr04 K-feldspar
Click Here for a Complete Set of Measurements (in MS Excel 4.0 format)
| E= 49.0 ± 3.0 (kcal/mol) | | log(Do/ro^2)= 7.0 ± 2.0 (1/sec) | | J= 6.78E-3 |
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| Temp. | time | % 40Ar* | 39Ar | % 39Ar* | age ± 1sd | log(D/r^2) ± 1sd | log(r/ro) |
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| (C) | (min) | -- | (E-14 mol) | released | (Ma) | (1/sec) | -- |
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| 450 | 16 | 20.247 | 3.55 | 0.47 | 0.0 ± 1.41 | -7.75 ± 0.05 | -.03 |
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| 450 | 20 | 9.799 | 1.54 | 0.67 | 0.0 ± 1.04 | -7.82 ± 0.04 | 0.00 |
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| 500 | 15 | 42.437 | 4.85 | 1.31 | 0.0 ± 0.42 | -6.96 ± 0.05 | 0.05 |
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| 500 | 23 | 59.425 | 3.57 | 1.78 | 1.5 ± 0.47 | -7.08 ± 0.03 | 0.11 |
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| 550 | 15 | 61.769 | 8.09 | 2.85 | 6.7 ± 0.25 | -6.36 ± 0.05 | 0.18 |
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| 550 | 29 | 74.897 | 7.77 | 3.88 | 6.7 ± 0.25 | -6.50 ± 0.03 | 0.25 |
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| 600 | 25 | 73.887 | 16.30 | 6.04 | 8.6 ± 0.21 | -5.95 ± 0.03 | 0.34 |
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| 600 | 25 | 85.067 | 8.93 | 7.22 | 8.7 ± 0.09 | -6.09 ± 0.03 | 0.41 |
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| 650 | 15 | 76.880 | 17.90 | 9.58 | 9.7 ± 0.06 | -5.46 ± 0.05 | 0.43 |
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| 650 | 20 | 88.275 | 11.00 | 11.04 | 8.8 ± 0.08 | -5.71 ± 0.04 | 0.55 |
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| 700 | 15 | 81.606 | 18.20 | 13.44 | 9.4 ± 0.05 | -5.29 ± 0.05 | 0.64 |
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| 700 | 24 | 88.397 | 11.80 | 15.00 | 8.9 ± 0.07 | -5.62 ± 0.03 | 0.81 |
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| 750 | 19 | 83.079 | 15.30 | 17.02 | 9.3 ± 0.05 | -5.35 ± 0.04 | 0.94 |
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| 750 | 23 | 84.817 | 8.35 | 18.13 | 9.1 ± 0.10 | -5.66 ± 0.03 | 1.09 |
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| 800 | 22 | 83.535 | 13.50 | 19.91 | 9.3 ± 0.06 | -5.39 ± 0.03 | 1.21 |
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| 825 | 15 | 84.819 | 9.75 | 21.20 | 9.5 ± 0.10 | -5.34 ± 0.05 | 1.29 |
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| 850 | 16 | 83.964 | 12.30 | 22.82 | 9.7 ± 0.07 | -5.23 ± 0.04 | 1.35 |
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| 875 | 15 | 83.007 | 12.60 | 24.48 | 9.7 ± 0.08 | -5.16 ± 0.05 | 1.42 |
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| 900 | 17 | 81.580 | 15.20 | 26.49 | 9.9 ± 0.06 | -5.10 ± 0.04 | 1.49 |
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| 900 | 16 | 81.524 | 9.61 | 27.76 | 10.0 ± 0.09 | -5.25 ± 0.04 | 1.56 |
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| 950 | 16 | 77.796 | 17.80 | 30.11 | 10.5 ± 0.06 | -4.95 ± 0.04 | 1.60 |
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| 975 | 15 | 77.555 | 19.60 | 32.69 | 10.7 ± 0.05 | -4.85 ± 0.05 | 1.63 |
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| 1000 | 15 | 75.195 | 21.20 | 35.49 | 11.2 ± 0.04 | -4.78 ± 0.05 | 1.68 |
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| 1025 | 16 | 76.187 | 26.10 | 38.94 | 11.9 ± 0.04 | -4.68 ± 0.04 | 1.71 |
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| 1050 | 15 | 75.838 | 24.70 | 42.20 | 12.6 ± 0.04 | -4.64 ± 0.05 | 1.77 |
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| 1075 | 15 | 75.737 | 25.00 | 45.50 | 13.5 ± 0.04 | -4.60 ± 0.05 | 1.83 |
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| 1100 | 15 | 76.487 | 24.90 | 48.79 | 14.5 ± 0.05 | -4.57 ± 0.05 | 1.88 |
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| 1100 | 35 | 79.664 | 32.90 | 53.13 | 14.9 ± 0.03 | -4.78 ± 0.02 | 1.99 |
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| 1100 | 50 | 80.156 | 27.70 | 56.79 | 15.1 ± 0.06 | -4.96 ± 0.02 | 2.08 |
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| 1100 | 79 | 81.505 | 29.00 | 60.62 | 14.9 ± 0.05 | -5.10 ± 0.02 | 2.15 |
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| 1100 | 189 | 90.108 | 39.70 | 65.87 | 14.8 ± 0.04 | -5.29 ± 0.01 | 2.25 |
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| 1100 | 246 | 61.351 | 32.10 | 70.11 | 14.6 ± 0.06 | -5.44 ± 0.01 | 2.32 |
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| 1100 | 782 | 55.592 | 56.40 | 77.56 | 14.5 ± 0.06 | -5.61 ± 0.01 | 2.40 |
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| 1175 | 26 | 79.258 | 16.70 | 79.76 | 14.4 ± 0.10 | -4.57 ± 0.03 | 2.09 |
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| 1225 | 30 | 72.150 | 62.60 | 88.03 | 14.5 ± 0.04 | -3.93 ± 0.02 | 1.89 |
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| 1250 | 26 | 72.873 | 47.00 | 94.24 | 15.0 ± 0.05 | -3.72 ± 0.03 | 1.84 |
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| 1275 | 30 | 80.420 | 25.10 | 97.56 | 15.3 ± 0.11 | -3.71 ± 0.02 | 1.90 |
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| 1350 | 19 | -294.174 | 5.38 | 98.27 | 16.9 ± 0.65 | -3.91 ± 0.04 | 2.16 |
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| 1550 | 9 | 3.543 | 11.00 | 99.72 | 11.7 ± 2.17 | -2.86 ± 0.07 | 1.99 |
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| 1550 | 12 | -1.046 | 2.11 | 99.99 | 0 ± 16.9 | -2.73 ± 0.00 | 1.93 |
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