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

Data Summary for gr16 K-feldspar

Click Here for a Complete Set of Measurements (in MS Excel 4.0 format)
E= 47.57 ± 1.33(kcal/mol) log(Do/ro^2)= 5.34 ± 0.35(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 27 84.754 1.33 0.14 0.0 ± 5.00 -9.03 ± 3.60 0.00
450 25 31.940 0.55 0.20 0.0 ± 5.00 -9.00 ± 3.28 -.02
500 35 82.469 1.38 0.34 0.0 ± 5.00 -8.55 ± 2.67 0.04
500 30 53.025 1.95 0.54 0.0 ± 5.00 -8.11 ± 2.83 0.00
550 15 86.248 4.29 0.98 0.0 ± 5.00 -7.23 ± 4.72 -.03
550 20 68.821 3.43 1.34 0.0 ± 5.00 -7.27 ± 3.68 -.01
600 16 85.024 9.68 2.34 0.0 ± 5.00 -6.52 ± 4.45 -.02
600 31 76.497 9.77 3.35 10.9 ± 2.00 -6.61 ± 2.70 0.02
650 16 85.297 16.10 5.02 19.6 ± 2.00 -5.94 ± 4.41 0.01
650 22 83.907 12.20 6.29 10.8 ± 2.00 -6.07 ± 3.37 0.07
700 15 88.255 22.30 8.60 16.0 ± 2.00 -5.52 ± 4.63 0.09
700 20 88.042 15.30 10.18 11.1 ± 2.00 -5.71 ± 3.60 0.18
750 15 88.968 25.20 12.79 14.7 ± 2.00 -5.28 ± 4.61 0.23
750 21 89.568 18.00 14.65 11.3 ± 0.05 -5.50 ± 3.44 0.34
800 19 90.047 29.10 17.67 13.4 ± 0.03 -5.17 ± 3.74 0.41
800 22 89.890 17.90 19.52 11.4 ± 0.06 -5.39 ± 3.30 0.52
850 15 88.242 22.70 21.87 12.2 ± 0.04 -5.07 ± 4.58 0.58
850 26 88.556 21.80 24.13 11.8 ± 0.04 -5.28 ± 2.89 0.68
900 32 90.232 29.00 27.13 13.4 ± 0.05 -5.20 ± 2.48 0.84
900 20 88.866 16.60 28.85 13.5 ± 0.06 -5.20 ± 3.55 0.84
950 21 89.401 32.40 32.21 16.6 ± 0.05 -4.89 ± 3.40 0.87
950 19 92.541 17.10 33.98 17.6 ± 0.04 -5.09 ± 3.70 0.97
1000 25 91.576 39.50 38.07 23.7 ± 0.06 -4.81 ± 2.95 0.99
1000 30 91.389 26.50 40.82 27.4 ± 0.04 -5.02 ± 2.57 1.10
1050 20 88.102 34.90 44.44 38.6 ± 0.06 -4.69 ± 3.53 1.09
1050 33 92.438 35.30 48.10 39.0 ± 0.05 -4.87 ± 2.39 1.18
1100 15 92.560 32.40 51.45 48.6 ± 0.20 -4.54 ± 4.55 1.15
1100 30 93.906 39.20 55.52 45.2 ± 0.05 -4.71 ± 2.56 1.24
1100 52 94.096 39.90 59.65 45.3 ± 0.06 -4.90 ± 1.85 1.33
1100 198 92.791 76.10 67.53 49.5 ± 0.06 -5.13 ± 1.35 1.45
1175 15 93.628 34.20 71.07 57.2 ± 0.09 -4.28 ± 4.56 1.22
1200 17 95.313 56.30 76.90 57.2 ± 0.09 -4.05 ± 4.07 1.17
1225 20 95.309 96.60 86.91 57.2 ± 0.09 -3.72 ± 3.50 1.06
1250 29 93.754 95.40 96.79 57.2 ± 0.09 -3.49 ± 2.42 1.00
1275 24 82.647 24.10 99.28 57.2 ± 0.09 -3.37 ± 2.88 1.00
1350 17 44.308 6.91 99.99 57.2 ± 0.09 -2.77 ± 4.47 0.85