Mustang Springs
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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
|
9.678
|
0.016
|
-1.73E-02
|
2.93E-04
|
3.66E-14
|
98.0
|
9.552
|
91.9±0.3
|
8.81E-04
|
-0.035
|
|
2
|
4
|
1
|
9.956
|
0.020
|
-5.76E-03
|
4.55E-04
|
3.77E-14
|
97.6
|
9.784
|
94.1±0.2
|
1.81E-03
|
-0.012
|
|
3
|
4
|
1
|
9.467
|
0.015
|
-8.63E-02
|
-4.88E-04
|
4.29E-15
|
97.4
|
9.565
|
92.0±1.3
|
4.42E-04
|
-0.174
|
|
4
|
4
|
1
|
9.599
|
0.016
|
-7.06E-03
|
2.69E-04
|
4.37E-14
|
98.2
|
9.481
|
91.2±0.2
|
6.35E-04
|
-0.014
|
|
5
|
4
|
1
|
9.579
|
0.014
|
-7.66E-03
|
3.00E-04
|
4.52E-14
|
98.1
|
9.452
|
91.0±0.2
|
2.81E-04
|
-0.015
|
|
6
|
4
|
1
|
12.438
|
0.051
|
-2.62E-01
|
8.63E-03
|
2.90E-15
|
74.0
|
9.826
|
94.5±2.6
|
1.01E-02
|
-0.530
|
|
7
|
4
|
1
|
9.884
|
0.017
|
-1.97E-02
|
9.18E-04
|
3.45E-14
|
96.2
|
9.573
|
92.1±0.3
|
1.10E-03
|
-0.040
|
|
8
|
4
|
1
|
9.952
|
0.020
|
-8.31E-03
|
3.01E-04
|
4.30E-14
|
98.2
|
9.825
|
94.5±0.3
|
1.77E-03
|
-0.017
|
|
9
|
4
|
1
|
9.944
|
0.019
|
-1.16E-02
|
4.15E-04
|
4.66E-14
|
97.9
|
9.783
|
94.1±0.2
|
1.46E-03
|
-0.023
|
|
10
|
4
|
1
|
9.766
|
0.016
|
2.76E-02
|
8.75E-04
|
4.35E-14
|
96.4
|
9.473
|
91.2±0.2
|
7.40E-04
|
0.056
|
|
11
|
4
|
1
|
12.94
|
0.041
|
1.12E-01
|
1.13E-02
|
7.92E-15
|
72.9
|
9.580
|
92.2±0.8
|
7.11E-03
|
0.226
|
|
12
|
4
|
1
|
9.554
|
0.015
|
-9.66E-03
|
6.37E-04
|
5.13E-14
|
97.1
|
9.328
|
89.8±0.2
|
4.50E-04
|
-0.020
|
|
13
|
4
|
1
|
9.551
|
0.016
|
-1.61E-02
|
1.15E-03
|
4.21E-14
|
95.5
|
9.173
|
88.3±0.2
|
6.27E-04
|
-0.033
|
|
14
|
4
|
1
|
9.329
|
0.014
|
-3.52E-02
|
4.59E-04
|
9.66E-15
|
96.5
|
9.153
|
88.2±0.5
|
2.72E-04
|
-0.071
|
|
15
|
4
|
1
|
10.23
|
0.015
|
-1.14E-02
|
7.36E-04
|
3.83E-14
|
96.9
|
9.973
|
95.8±0.3
|
5.54E-04
|
-0.023
|
|
16
|
4
|
1
|
9.343
|
0.014
|
-6.65E-03
|
6.11E-04
|
7.32E-14
|
97.0
|
9.124
|
87.9±0.3
|
1.60E-04
|
-0.013
|
|
17
|
4
|
1
|
9.199
|
0.016
|
1.73E-02
|
2.09E-03
|
6.93E-15
|
90.7
|
8.545
|
82.4±0.7
|
6.62E-04
|
0.035
|
|
18
|
4
|
1
|
9.657
|
0.016
|
1.34E-03
|
1.68E-03
|
3.61E-14
|
93.8
|
9.124
|
87.9±0.3
|
6.80E-04
|
0.003
|
|
19
|
4
|
1
|
9.847
|
0.016
|
-1.87E-02
|
2.48E-03
|
1.07E-14
|
90.9
|
9.076
|
87.4±0.6
|
5.08E-04
|
-0.038
|
|
20
|
4
|
1
|
9.649
|
0.016
|
9.56E-03
|
4.68E-04
|
3.99E-14
|
97.6
|
9.475
|
91.2±0.3
|
6.49E-04
|
0.019
|
|
21
|
4
|
1
|
9.563
|
0.016
|
2.49E-02
|
1.00E-03
|
2.45E-14
|
95.9
|
9.232
|
88.9±0.8
|
8.18E-04
|
0.050
|
|
22
|
4
|
1
|
9.452
|
0.015
|
-6.70E-03
|
8.03E-04
|
6.60E-14
|
96.4
|
9.177
|
88.4±0.2
|
5.05E-04
|
-0.014
|
|
23
|
4
|
1
|
10.04
|
0.023
|
-4.69E-02
|
1.66E-03
|
5.50E-15
|
92.2
|
9.510
|
91.5±0.9
|
2.74E-03
|
-0.095
|
|
24
|
4
|
1
|
9.546
|
0.019
|
4.04E-01
|
8.40E-04
|
1.11E-14
|
96.0
|
9.300
|
89.5±0.5
|
1.70E-03
|
0.816
|
|
25
|
4
|
1
|
9.931
|
0.018
|
4.54E-02
|
1.50E-04
|
4.92E-14
|
98.7
|
9.854
|
94.7±0.2
|
1.22E-03
|
0.092
|
|
26
|
4
|
1
|
9.693
|
0.018
|
-1.67E-02
|
6.50E-04
|
3.52E-14
|
96.9
|
9.462
|
91.1±0.3
|
1.28E-03
|
-0.034
|
|
27
|
4
|
1
|
9.465
|
0.014
|
-1.43E-02
|
6.13E-04
|
3.92E-14
|
97.0
|
9.245
|
89.0±0.3
|
1.61E-04
|
-0.029
|
|
28
|
4
|
1
|
9.600
|
0.014
|
-9.12E-03
|
2.34E-04
|
5.26E-14
|
98.3
|
9.492
|
91.3±0.2
|
2.76E-04
|
-0.018
|
|
29
|
4
|
1
|
9.850
|
0.019
|
2.66E-02
|
1.95E-04
|
8.96E-14
|
98.5
|
9.758
|
93.8±0.2
|
1.64E-03
|
0.054
|
|
30
|
4
|
1
|
9.702
|
0.016
|
-9.96E-03
|
1.98E-04
|
6.79E-14
|
98.3
|
9.605
|
92.4±0.2
|
8.19E-04
|
-0.020
|
|
31
|
4
|
1
|
9.663
|
0.014
|
-2.76E-04
|
2.16E-04
|
6.87E-14
|
98.3
|
9.562
|
92.0±0.3
|
7.91E-05
|
-0.001
|