ANG-1-11440 K-feldspar (J = 0.000410) Total gas age = 1.01 ± 0.07 Ma |
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step |
T (° C) |
40Ar/39Ar |
37Ar/39Ar |
36Ar/39Ar |
39Ar (mol) |
S39Ar (%) |
40Ar* (%) |
Age ± 1s (Ma) |
1 |
450 |
155.4 |
5.29E-01 |
4.63E-01 |
3.19E-15 |
0.245 |
12.0 |
13.79 ± 1.08 |
2 |
450 |
48.08 |
4.43E-02 |
1.68E-01 |
1.04E-15 |
0.326 |
-3.18 |
- |
3 |
500 |
41.52 |
6.51E-02 |
1.14E-01 |
4.48E-15 |
0.670 |
18.6 |
5.75 ± 0.38 |
4 |
500 |
28.52 |
-1.28E-01 |
9.17E-02 |
2.39E-15 |
0.854 |
4.82 |
1.03 ± 0.54 |
5 |
550 |
32.48 |
5.29E-02 |
7.92E-02 |
1.19E-14 |
1.77 |
27.8 |
6.69 ± 0.19 |
6 |
550 |
16.41 |
2.21E-02 |
4.92E-02 |
5.65E-15 |
2.20 |
11.1 |
1.36 ± 0.26 |
7 |
600 |
15.35 |
5.33E-03 |
3.84E-02 |
1.35E-14 |
3.24 |
25.8 |
2.94 ± 0.15 |
8 |
600 |
8.786 |
8.18E-02 |
2.69E-02 |
7.59E-15 |
3.82 |
9.21 |
0.61 ± 0.17 |
9 |
650 |
73.48 |
9.87E-02 |
2.42E-01 |
1.60E-14 |
5.06 |
2.47 |
1.34 ± 0.54 |
10 |
650 |
21.12 |
7.36E-02 |
6.90E-02 |
1.20E-14 |
5.98 |
3.32 |
0.52 ± 0.18 |
11 |
700 |
7.745 |
8.31E-02 |
2.18E-02 |
2.46E-14 |
7.88 |
16.7 |
0.96 ± 0.07 |
12 |
700 |
5.406 |
9.38E-02 |
1.61E-02 |
1.31E-14 |
8.88 |
11.4 |
0.46 ± 0.10 |
13 |
750 |
5.280 |
7.39E-02 |
1.49E-02 |
2.41E-14 |
10.7 |
15.8 |
0.62 ± 0.06 |
14 |
750 |
4.101 |
4.65E-02 |
1.15E-02 |
2.09E-14 |
12.3 |
16.5 |
0.51 ± 0.08 |
15 |
800 |
4.599 |
5.02E-02 |
1.33E-02 |
2.57E-14 |
14.3 |
14.2 |
0.49 ± 0.06 |
16 |
800 |
4.735 |
6.61E-02 |
1.42E-02 |
1.59E-14 |
15.5 |
10.7 |
0.38 ± 0.09 |
17 |
850 |
4.526 |
1.24E-02 |
1.27E-02 |
3.52E-14 |
18.3 |
16.6 |
0.56 ± 0.06 |
18 |
850 |
4.739 |
7.51E-02 |
1.34E-02 |
1.26E-14 |
19.2 |
15.6 |
0.56 ± 0.14 |
19 |
875 |
4.844 |
1.55E-02 |
1.34E-02 |
1.22E-14 |
20.2 |
17.3 |
0.63 ± 0.12 |
20 |
900 |
4.051 |
2.33E-02 |
1.09E-02 |
2.03E-14 |
21.7 |
19.3 |
0.59 ± 0.10 |
21 |
925 |
2.639 |
6.35E-02 |
5.95E-03 |
2.36E-14 |
23.5 |
32.0 |
0.64 ± 0.09 |
22 |
950 |
2.906 |
1.74E-02 |
6.74E-03 |
2.79E-14 |
25.7 |
30.2 |
0.66 ± 0.05 |
23 |
975 |
2.623 |
2.89E-02 |
5.04E-03 |
4.90E-14 |
29.4 |
42.0 |
0.82 ± 0.04 |
24 |
1000 |
2.907 |
-5.90E-03 |
5.40E-03 |
6.43E-14 |
34.4 |
43.9 |
0.95 ± 0.03 |
25 |
1025 |
3.227 |
2.89E-02 |
7.12E-03 |
2.06E-13 |
50.3 |
33.9 |
0.81 ± 0.04 |
26 |
1050 |
3.021 |
2.90E-02 |
6.32E-03 |
5.59E-14 |
54.6 |
37.2 |
0.84 ± 0.06 |
27 |
1075 |
2.407 |
2.10E-02 |
3.87E-03 |
1.43E-13 |
65.5 |
51.3 |
0.92 ± 0.01 |
28 |
1100 |
2.747 |
1.72E-02 |
4.90E-03 |
2.10E-13 |
81.7 |
46.4 |
0.94 ± 0.01 |
29 |
1100 |
5.029 |
1.62E-02 |
1.22E-02 |
9.91E-14 |
89.3 |
27.7 |
1.03 ± 0.03 |
30 |
1100 |
11.22 |
1.64E-02 |
3.26E-02 |
6.64E-14 |
94.4 |
13.8 |
1.14 ± 0.08 |
31 |
1200 |
5.526 |
2.64E-02 |
1.37E-02 |
5.92E-14 |
99.0 |
26.4 |
1.08 ± 0.21 |
32 |
1300 |
34.61 |
1.90E-01 |
1.03E-01 |
1.30E-14 |
100 |
11.8 |
3.03 ± 0.25 |