ANG-1-11400 K-feldspar (J = 0.000410) Total gas age = 0.98 ± 0.07 Ma

step

T

(° C)

⁴⁰Ar/³⁹Ar

³⁷Ar/³⁹Ar

³⁶Ar/³⁹Ar

³⁹Ar

(mol)

S³⁹Ar

(%)

⁴⁰Ar*

(%)

Age ± 1s

(Ma)

1

450

34.79

7.49E-01

1.40E-01

1.22E-15

0.177

-18.4

-

2

450

39.92

5.76E-01

1.72E-01

7.11E-16

0.281

-25.6

-

3

450

28.26

4.66E-01

1.10E-01

6.93E-16

0.381

-13.5

-

4

450

38.09

1.13E+00

1.51E-01

8.20E-16

0.500

-16.2

-

5

500

21.68

5.15E-01

7.20E-02

1.60E-15

0.732

1.9

0.32± 0.90

6

500

12.85

8.11E-01

6.50E-02

1.10E-15

0.891

-44.6

-

7

550

18.98

1.62E-01

3.96E-02

6.87E-15

1.89

37.8

5.36± 0.26

8

550

5.506

-1.09E-01

1.60E-02

4.04E-15

2.48

12.6

0.55± 0.30

9

600

7.215

3.00E-03

1.55E-02

1.31E-14

4.37

35.8

1.94± 0.10

10

600

4.213

1.35E-01

1.46E-02

5.26E-15

5.14

-2.6

-

11

650

39.01

-7.87E-04

1.25E-01

1.48E-14

7.28

5.5

1.59± 0.28

12

650

8.987

-5.22E-02

2.50E-02

5.27E-15

8.05

16.9

1.16± 0.24

13

700

6.282

-1.96E-02

1.35E-02

9.91E-15

9.49

35.3

1.68± 0.12

14

700

4.918

-1.14E-01

9.35E-03

7.85E-15

10.6

41.6

1.57± 0.23

15

750

3.633

-7.09E-04

8.24E-03

1.38E-14

12.6

31.4

0.87± 0.09

16

750

2.961

1.30E-01

9.81E-03

1.15E-14

14.3

1.5

0.03± 0.11

17

800

2.496

4.89E-02

5.65E-03

2.60E-14

18.1

31.6

0.60± 0.07

18

850

2.594

7.01E-02

6.30E-03

3.48E-14

23.1

27.1

0.53± 0.05

19

900

2.621

3.96E-02

5.45E-03

6.67E-14

32.8

37.5

0.73± 0.02

20

950

3.630

3.46E-02

8.27E-03

4.46E-14

39.3

31.8

0.86± 0.04

21

1000

3.318

3.62E-02

6.72E-03

5.51E-14

47.3

39.3

0.97± 0.03

22

1050

2.625

2.11E-02

4.14E-03

8.12E-14

59.1

52.2

1.02± 0.02

23

1100

2.216

1.55E-02

2.92E-03

1.26E-13

77.4

59.8

0.98± 0.01

24

1100

3.666

6.12E-03

7.52E-03

5.63E-14

85.5

38.5

1.05± 0.05

25

1100

8.540

2.67E-03

2.35E-02

4.48E-14

92.0

18.2

1.15± 0.06

26

1200

4.893

1.31E-02

1.11E-02

4.69E-14

98.8

32.6

1.19± 0.04

27

1250

52.55

-1.18E-02

1.69E-01

8.00E-15

100

5.0

1.95± 0.40