95-6-11(3) Hornblende (J = 0.00866) Total gas age = 46.19 ± 1.17 Ma

step

T

(°C)

⁴⁰Ar/³⁹Ar

³⁷Ar/³⁹Ar

³⁶Ar/³⁹Ar

³⁹Ar

(mol)

S³⁹Ar

(%)

⁴⁰Ar*

(%)

Age ± 1s

(Ma)

1

800

10.26

1.23E+00

2.66E-02

3.06E-14

13.3

24.1

38.3 ± 0.6

2

950

6.207

9.31E+00

1.31E-02

4.40E-14

32.4

48.3

46.5 ± 0.3

3

980

6.326

1.98E+01

1.58E-02

2.14E-14

41.6

48.8

48.2 ± 0.7

4

1010

6.174

1.86E+01

1.59E-02

1.80E-14

49.4

45.2

43.6 ± 0.6

5

1030

8.074

1.42E+01

2.23E-02

8.62E-15

53.2

31.1

39.2 ± 1.7

6

1060

8.635

1.13E+01

2.36E-02

8.25E-15

56.7

28.5

38.4 ± 1.6

7

1120

8.306

1.32E+01

2.24E-02

1.97E-14

65.3

31.8

41.2 ± 0.9

8

1180

7.884

1.91E+01

2.19E-02

2.19E-14

74.8

35.3

43.5 ± 0.8

9

1250

7.525

1.24E+01

1.93E-02

4.10E-14

92.5

36.0

42.2 ± 0.6

10

1350

24.12

1.37E+01

7.57E-02

1.73E-14

100

11.4

42.8 ± 1.8