Williams
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step
P (W)
t (min)
40Ar/39Ar
38Ar/39Ar
37Ar/39Ar
36Ar/39Ar
39Ar (mol)
%40Ar*
40Ar*/39ArK
Age (Ma)
+sAge (an)
Cl/K
Ca/K
1
4
1
10.37
0.020
1.11E-03
4.70E-03
7.47E-15
84.6
8.946
86.2±0.8
1.54E-03
0.002
2
4
1
11.39
0.037
-2.85E-03
5.48E-03
4.88E-14
85.1
9.735
93.6±0.4
6.34E-03
-0.006
3
4
1
12.49
0.026
-5.76E-03
9.16E-03
4.53E-14
77.6
9.747
93.7±0.4
3.01E-03
-0.012
4
4
1
8.841
0.014
-4.55E-03
5.01E-04
5.52E-14
97.4
8.656
83.5±0.2
1.96E-04
-0.009
5
4
1
18.89
0.047
1.06E+00
3.49E-02
3.78E-15
44.8
8.645
83.4±1.9
7.68E-03
2.138
6
4
1
11.20
0.017
2.06E-02
8.27E-03
4.34E-14
77.5
8.726
84.1±0.4
6.23E-04
0.042
7
4
1
11.20
0.022
-7.41E-03
5.66E-03
2.27E-14
84.2
9.487
91.3±0.4
2.04E-03
-0.015
8
4
1
10.34
0.019
-2.74E-03
4.85E-03
7.69E-14
85.3
8.868
85.5±0.3
1.43E-03
-0.006
9
4
1
9.667
0.016
4.03E-02
1.52E-03
3.57E-14
94.3
9.185
88.4±0.5
5.69E-04
0.081
10
4
1
9.756
0.016
-5.01E-03
6.95E-04
2.14E-14
96.8
9.513
91.5±0.3
6.56E-04
-0.010
11
4
1
9.036
0.016
-6.14E-03
1.38E-03
3.32E-14
94.3
8.591
82.9±0.3
6.29E-04
-0.012
12
4
1
9.792
0.015
-1.16E-02
2.39E-03
4.09E-14
91.8
9.048
87.2±0.3
2.83E-04
-0.023
13
4
1
21.29
0.038
9.97E-01
4.51E-02
3.82E-15
36.9
8.020
77.5±2.5
4.62E-03
2.015
14
4
1
10.42
0.018
-1.52E-02
1.22E-03
6.98E-14
95.5
10.02
96.3±0.3
1.33E-03
-0.031
15
4
1
9.783
0.033
-9.57E-03
1.90E-03
6.60E-14
93.2
9.183
88.4±0.4
5.48E-03
-0.019
16
4
1
9.300
0.015
-6.29E-03
7.67E-04
5.50E-14
96.6
9.036
87.1±0.3
3.50E-04
-0.013
17
4
1
8.759
0.014
-6.69E-02
-2.63E-03
3.46E-15
103
9.493
91.3±1.2
4.50E-04
-0.135
18
4
1
8.949
0.014
-1.69E-02
3.21E-04
7.45E-14
97.8
8.815
85.0±0.3
6.75E-05
-0.034
19
4
1
9.421
0.015
1.28E-02
1.12E-03
4.46E-14
95.5
9.054
87.2±0.3
4.06E-04
0.026
20
4
1
15.40
0.030
3.55E+00
2.27E-02
1.06E-15
53.3
9.005
86.8±7.0
3.42E-03
7.182
21
4
1
13.71
0.021
-1.76E-02
1.76E-02
3.95E-14
61.5
8.476
81.8±0.6
1.37E-03
-0.036
22
4
1
9.423
0.014
-1.29E-02
8.35E-04
3.65E-14
96.3
9.137
88.0±0.4
2.69E-04
-0.026
23
4
1
11.55
0.027
1.87E+00
7.81E-03
1.39E-15
74.0
9.394
90.4±3.4
3.57E-03
3.790
24
4
1
11.48
0.025
1.66E+00
1.51E-02
2.60E-15
59.0
7.136
69.1±1.7
2.59E-03
3.359
25
4
1
9.771
0.016
1.66E-01
3.19E-03
2.88E-14
89.6
8.807
84.9±0.3
5.60E-04
0.335
26
4
1
47.05
0.256
-5.33E+00
4.47E-02
8.41E-17
50.9
33.17
300.9±60.4
6.47E-02
-10.716
27
4
1
10.47
0.015
1.50E-03
4.75E-03
6.12E-14
85.6
9.032
87.0±0.5
3.41E-04
0.003
28
4
1
9.576
0.018
-4.35E-03
1.28E-03
3.01E-14
95.1
9.160
88.2±0.3
1.19E-03
-0.009
29
4
1
9.654
0.016
-2.70E-02
2.18E-03
1.00E-14
91.4
8.969
86.4±0.7
5.71E-04
-0.055
30
4
1
9.373
0.014
1.96E-02
4.41E-04
1.79E-14
97.3
9.208
88.7±0.5
1.80E-04
0.040
31
4
1
14.34
0.041
-4.54E-01
1.31E-02
9.60E-16
65.2
10.40
99.8±6.0
6.90E-03
-0.917
32
4
1
10.24
0.020
-9.97E-03
1.27E-03
5.62E-14
95.5
9.826
94.5±0.3
1.92E-03
-0.020
33
4
1
9.041
0.014
-8.22E-03
7.01E-04
5.47E-14
96.8
8.796
84.8±0.2
1.34E-04
-0.017
34
4
1
10.08
0.017
8.89E-02
2.28E-03
1.61E-14
92.1
9.380
90.3±0.6
9.90E-04
0.180
35
4
1
9.787
0.015
-1.48E-02
2.11E-03
7.22E-14
92.6
9.126
87.9±0.3
3.81E-04
-0.030
36
4
1
9.274
0.015
1.37E-01
1.19E-03
1.23E-14
94.6
8.898
85.7±0.4
5.20E-04
0.276
37
4
1
9.929
0.014
-1.54E-02
5.82E-04
2.81E-14
97.3
9.718
93.5±0.4
6.95E-05
-0.031
38
4
1
10.06
0.023
6.91E-02
1.55E-03
2.52E-14
94.6
9.572
92.1±0.3
2.74E-03
0.140
39
4
1
17.21
0.577
1.39E+00
2.13E-02
1.26E-15
59.7
11.00
105.4±4.6
1.55E-01
2.814
40
4
1
9.431
0.013
1.55E-03
2.70E-04
3.24E-14
98.3
9.314
89.7±0.3
-8.91E-05
0.003
41
4
1
46.77
0.542
9.59E-01
1.16E-01
1.29E-16
21.6
12.61
120.4±44.2
1.41E-01
1.938
42
4
1
9.235
0.015
3.46E-03
1.06E-04
3.31E-14
98.8
9.167
88.3±0.2
4.87E-04
0.007
43
4
1
9.191
0.014
3.61E-03
5.89E-04
3.89E-14
97.0
8.980
86.5±0.3
1.76E-04
0.007
44
4
1
9.622
0.017
4.69E-03
9.84E-04
3.98E-14
96.0
9.295
89.5±0.3
9.84E-04
0.009
45
4
1
11.72
0.033
2.02E+00
1.13E-02
7.79E-15
71.7
8.550
82.5±1.0
4.91E-03
4.093
46
4
1
9.231
0.014
1.38E-02
2.33E-04
3.01E-14
98.3
9.126
87.9±0.2
2.08E-04
0.028
47
4
1
9.192
0.015
1.18E-02
3.83E-04
2.21E-14
97.7
9.043
87.1±0.3
4.08E-04
0.024
48
4
1
10.81
0.020
6.47E-03
1.95E-03
2.65E-14
93.8
10.20
97.9±0.4
1.74E-03
0.013
49
4
1
10.04
0.017
9.10E-05
3.54E-03
3.18E-14
88.8
8.956
86.3±0.4
9.89E-04
0.000
50
4
1
10.04
0.017
9.10E-05
3.54E-03
3.18E-14
88.8
8.956
86.3±0.4
9.89E-04
0.000
51
4
1
9.014
0.014
1.28E-03
4.31E-04
3.54E-14
97.7
8.849
85.3±0.2
1.53E-04
0.003
52
4
1
9.461
0.019
2.79E-03
1.41E-03
2.84E-14
94.7
9.008
86.8±0.3
1.63E-03
0.006
53
4
1
9.831
0.016
5.80E-03
7.40E-04
3.26E-14
96.9
9.576
92.1±0.2
7.97E-04
0.012
54
4
1
15.70
0.071
-1.12E-02
3.30E-03
1.52E-15
88.0
14.69
139.5±3.5
1.58E-02
-0.023
55
4
1
512.0
1.179
1.10E-01
1.61E+00
3.27E-17
6.4
35.67
321.7±1398.5
2.39E-01
0.223
56
4
1
9.564
0.021
6.72E-02
9.88E-04
9.72E-14
96.0
9.241
89.0±0.3
2.18E-03
0.136
57
4
1
9.436
0.015
-3.65E-04
1.03E-03
9.34E-14
95.8
9.096
87.6±0.2
4.91E-04
-0.001
58
4
1
9.656
0.020
1.42E+00
5.72E-03
7.05E-15
81.7
8.065
77.9±3.1
1.69E-03
2.864
59
4
1
10.04
0.018
5.27E-03
6.22E-04
1.17E-13
97.7
9.822
94.4±0.2
1.35E-03
0.011
60
4
1
9.736
0.015
1.01E-02
1.01E-03
4.48E-14
96.2
9.401
90.5±0.4
4.05E-04
0.020
61
4
1
7.483
0.026
1.92E+00
5.18E-03
2.75E-15
75.9
6.100
59.2±4.6
3.19E-03
3.878
62
4
1
12.37
0.028
1.88E+00
1.17E-02
7.90E-15
72.1
9.074
87.4±3.2
3.42E-03
3.810
63
4
1
9.982
0.017
1.72E-03
1.73E-03
4.27E-14
94.2
9.433
90.8±0.4
9.03E-04
0.003
64
4
1
9.258
0.015
2.10E-03
9.35E-04
4.61E-14
96.3
8.945
86.2±0.4
5.11E-04
0.004
65
4
1
10.91
0.017
1.12E-03
6.49E-03
4.05E-14
81.8
8.958
86.3±0.4
7.25E-04
0.002
66
4
1
9.823
0.025
1.46E+00
7.22E-03
7.20E-15
77.6
7.794
75.3±2.7
2.91E-03
2.946