(Click here for a Complete Data Set in Excel 4.0 format)

Data Summary for gr14 K-feldspar

Click Here for a Complete Set of Measurements (in MS Excel 4.0 format)
E= 44.66 ± 1.34(kcal/mol) log(Do/ro^2)= 4.77 ± 0.36(1/sec) J= .000000

Temp. time % 40Ar* 39Ar % 39Ar* age ± 1sd log(D/r^2) ± 1sd log(r/ro)
(C) (min) -- (E-14 mol) released (Ma) (1/sec) --
450 16 59.140 1.84 0.16 0.0 ± 17.66 -8.70 ± 4.86 -.02
450 20 16.981 0.82 0.23 0.0 ± 6.56 -8.75 ± 3.81 0.01
500 15 65.836 2.73 0.46 0.0 ± 3.94 -7.85 ± 4.76 0.00
500 21 66.163 2.06 0.64 0.0 ± 1.95 -7.92 ± 3.56 0.03
550 15 79.509 7.43 1.27 0.0 ± 1.83 -6.98 ± 4.73 -.06
550 20 76.294 4.63 1.67 2.6 ± 0.72 -7.11 ± 3.67 0.01
600 16 76.728 14.30 2.89 9.2 ± 0.66 -6.34 ± 4.44 -.03
600 21 84.581 9.86 3.73 8.6 ± 0.35 -6.46 ± 3.51 0.02
650 15 80.594 20.80 5.51 9.3 ± 0.34 -5.84 ± 4.65 0.02
650 20 90.839 14.50 6.75 9.4 ± 0.28 -6.00 ± 3.62 0.10
700 16 81.590 27.00 9.06 9.3 ± 0.23 -5.52 ± 4.37 0.13
700 20 92.076 16.20 10.44 10.2 ± 0.30 -5.75 ± 3.59 0.25
750 15 84.563 23.90 12.49 10.7 ± 0.07 -5.39 ± 4.60 0.31
750 19 89.737 14.30 13.71 9.6 ± 0.12 -5.66 ± 3.73 0.44
800 17 82.616 21.90 15.58 10.1 ± 0.04 -5.37 ± 4.10 0.52
800 20 85.824 13.30 16.71 9.6 ± 0.07 -5.62 ± 3.57 0.65
850 15 80.870 18.70 18.31 10.2 ± 0.06 -5.31 ± 4.58 0.69
875 15 81.278 18.20 19.87 10.3 ± 0.05 -5.29 ± 4.57 0.78
900 16 78.383 22.10 21.75 10.9 ± 0.06 -5.19 ± 4.32 0.82
925 15 79.559 17.80 23.28 11.3 ± 0.06 -5.22 ± 4.57 0.92
950 25 79.280 33.10 26.11 12.3 ± 0.04 -5.14 ± 2.96 0.96
975 17 75.758 22.50 28.03 13.9 ± 0.05 -5.10 ± 4.08 1.02
1000 18 75.991 30.00 30.59 15.2 ± 0.04 -4.96 ± 3.88 1.03
1000 20 79.680 24.50 32.69 15.9 ± 0.05 -5.06 ± 3.54 1.08
1050 22 77.584 62.10 37.99 17.9 ± 0.05 -4.65 ± 3.26 1.02
1075 15 81.632 54.10 42.61 18.4 ± 0.03 -4.49 ± 4.55 1.01
1100 15 83.707 60.60 47.78 18.8 ± 0.02 -4.39 ± 4.54 1.02
1100 30 86.723 68.40 53.63 19.0 ± 0.05 -4.58 ± 2.53 1.12
1100 46 89.395 59.40 58.70 20.1 ± 0.02 -4.77 ± 1.93 1.21
1100 60 91.216 48.60 62.85 21.5 ± 0.03 -4.92 ± 1.72 1.29
1100 107 93.585 57.30 67.75 22.7 ± 0.03 -5.05 ± 1.46 1.35
1100 162 96.545 55.90 72.52 23.7 ± 0.03 -5.18 ± 1.40 1.42
1100 788 79.629 123.00 83.00 25.0 ± 0.04 -5.39 ± 1.15 1.52
1175 15 87.424 17.10 84.46 26.5 ± 0.09 -4.39 ± 4.56 1.21
1200 19 86.561 43.00 88.13 26.5 ± 0.09 -4.02 ± 3.67 1.08
1225 15 86.821 55.00 92.83 26.5 ± 0.09 -3.64 ± 4.51 0.95
1250 28 91.173 48.10 96.94 26.5 ± 0.09 -3.69 ± 2.57 1.02
1275 20 88.813 24.30 99.01 26.5 ± 0.09 -3.42 ± 3.40 0.94
1350 14 ****** 5.98 99.52 26.5 ± 0.09 -3.45 ± 4.84 1.10
1550 17 ****** 5.57 99.99 26.5 ± 0.09 -2.81 ± 2.22 1.11