Data Summary for ng6 K-feldspar
Click Here for a Complete Set of Measurements (in MS Excel 4.0 format)
| E= 40.85 ± 0.95(kcal/mol) | | log(Do/ro^2)= 3.60 ± 0.24(1/sec) | | J= .004296 |
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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 | 14.324 | 0.57 | 0.13 | 281.0 ± 38.31 | -8.86 ± 4.86 | 0.05 |
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| 450 | 22 | 20.246 | 0.36 | 0.21 | 67.7 ± 2.53 | -8.78 ± 3.57 | 0.02 |
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| 500 | 17 | 80.122 | 1.06 | 0.45 | 80.6 ± 0.57 | -7.91 ± 4.30 | -.02 |
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| 500 | 25 | 88.121 | 0.97 | 0.67 | 56.1 ± 2.06 | -7.89 ± 3.16 | -.03 |
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| 550 | 22 | 90.459 | 2.47 | 1.23 | 60.4 ± 0.36 | -7.20 ± 3.48 | -.03 |
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| 550 | 30 | 23.120 | 1.98 | 1.68 | 53.5 ± 0.98 | -7.24 ± 2.75 | 0.00 |
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| 600 | 25 | 37.078 | 4.90 | 2.79 | 52.8 ± 2.41 | -6.59 ± 3.13 | -.02 |
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| 600 | 24 | 26.618 | 2.93 | 3.45 | 57.1 ± 2.42 | -6.65 ± 3.16 | 0.01 |
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| 650 | 14 | 96.649 | 5.24 | 4.63 | 56.3 ± 0.32 | -6.05 ± 4.93 | -.01 |
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| 650 | 23 | 98.079 | 5.44 | 5.87 | 55.7 ± 0.31 | -6.13 ± 3.24 | 0.03 |
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| 700 | 15 | 97.787 | 9.30 | 7.97 | 58.3 ± 0.35 | -5.60 ± 4.62 | 0.01 |
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| 700 | 16 | 98.577 | 5.88 | 9.30 | 57.7 ± 0.35 | -5.73 ± 4.34 | 0.07 |
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| 725 | 15 | 98.526 | 7.12 | 10.91 | 58.6 ± 0.33 | -5.55 ± 4.59 | 0.10 |
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| 750 | 16 | 98.648 | 9.30 | 13.02 | 58.9 ± 0.33 | -5.38 ± 4.33 | 0.13 |
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| 775 | 30 | 99.023 | 14.40 | 16.27 | 59.1 ± 0.34 | -5.38 ± 2.63 | 0.23 |
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| 775 | 26 | 99.059 | 5.69 | 17.56 | 59.2 ± 0.39 | -5.66 ± 2.89 | 0.37 |
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| 800 | 21 | 98.900 | 6.50 | 19.03 | 59.4 ± 0.37 | -5.47 ± 3.42 | 0.38 |
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| 825 | 20 | 98.896 | 7.35 | 20.69 | 59.3 ± 0.32 | -5.36 ± 3.55 | 0.42 |
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| 850 | 33 | 98.898 | 11.40 | 23.27 | 59.0 ± 0.31 | -5.35 ± 2.43 | 0.50 |
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| 875 | 15 | 98.855 | 6.00 | 24.63 | 59.9 ± 0.32 | -5.25 ± 4.56 | 0.53 |
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| 875 | 22 | 98.795 | 6.56 | 26.12 | 59.8 ± 0.34 | -5.35 ± 3.28 | 0.59 |
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| 900 | 26 | 98.900 | 8.96 | 28.14 | 60.3 ± 0.36 | -5.26 ± 2.87 | 0.62 |
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| 925 | 15 | 98.730 | 6.32 | 29.57 | 60.1 ± 0.38 | -5.14 ± 4.56 | 0.64 |
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| 950 | 29 | 99.671 | 13.70 | 32.66 | 60.6 ± 0.36 | -5.06 ± 2.63 | 0.68 |
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| 975 | 36 | 99.314 | 16.50 | 36.41 | 60.7 ± 0.36 | -5.03 ± 2.26 | 0.74 |
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| 1000 | 25 | 98.558 | 12.00 | 39.13 | 61.0 ± 0.34 | -4.97 ± 2.94 | 0.78 |
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| 1025 | 15 | 99.041 | 8.30 | 41.00 | 61.3 ± 0.38 | -4.88 ± 4.55 | 0.80 |
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| 1050 | 16 | 98.803 | 14.80 | 44.35 | 61.3 ± 0.33 | -4.63 ± 4.29 | 0.74 |
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| 1075 | 15 | 98.936 | 16.50 | 48.09 | 61.4 ± 0.34 | -4.52 ± 4.54 | 0.75 |
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| 1100 | 27 | 98.957 | 34.10 | 55.80 | 61.8 ± 0.33 | -4.40 ± 2.73 | 0.75 |
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| 1100 | 44 | 98.668 | 26.70 | 61.85 | 62.2 ± 0.33 | -4.65 ± 1.96 | 0.87 |
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| 1100 | 74 | 98.542 | 20.00 | 66.37 | 62.6 ± 0.36 | -4.94 ± 1.58 | 1.02 |
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| 1125 | 13 | 97.832 | 4.39 | 67.37 | 63.3 ± 0.46 | -4.81 ± 5.20 | 1.01 |
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| 1150 | 19 | 97.920 | 9.38 | 69.49 | 63.4 ± 0.36 | -4.62 ± 3.69 | 0.97 |
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| 1175 | 13 | 97.996 | 7.71 | 71.23 | 63.7 ± 0.34 | -4.51 ± 5.20 | 0.97 |
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| 1200 | 10 | 97.634 | 8.72 | 73.21 | 64.2 ± 0.34 | -4.32 ± 6.66 | 0.93 |
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| 1225 | 14 | 97.527 | 19.90 | 77.70 | 64.8 ± 0.34 | -4.05 ± 4.84 | 0.85 |
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| 1250 | 10 | 97.805 | 18.60 | 81.91 | 65.3 ± 0.33 | -3.85 ± 6.65 | 0.79 |
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| 1275 | 12 | 98.166 | 26.80 | 87.98 | 65.6 ± 0.36 | -3.64 ± 5.57 | 0.73 |
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| 1300 | 10 | 98.151 | 24.20 | 93.46 | 66.8 ± 0.35 | -3.39 ± 6.63 | 0.65 |
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| 1400 | 12 | 95.920 | 20.00 | 97.99 | 68.3 ± 0.37 | -3.18 ± 5.53 | 0.72 |
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| 1550 | 10 | 63.275 | 8.28 | 99.99 | 69.4 ± 0.66 | -2.45 ± 4.47 | 0.57 |
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