Sample %39Ar 37Ar/39Ar 36Ar/39Ar 40Ar*/39Ar %40Ar* Age (Ma) SD

 

DMS96-25D

18

22

16

15

23

21

19

12

08

24

09

06

04

11

02

01

20

17

05

07

03

10

13

0.0297

0.6573

9.376

98.0

13.38

0.34

0.0170

0.9164

9.480

97.2

13.42

0.25

0.0166

0.2511

9.301

99.2

13.44

0.19

0.0235

0.8172

9.480

97.5

13.46

0.50

0.0799

1.320

9.682

96.0

13.54

0.37

0.0504

0.4054

9.431

98.8

13.57

0.33

0.0145

0.3837

9.440

98.8

13.59

0.45

0.0565

8.467

11.83

78.9

13.59

0.45

0.0421

0.4599

9.499

98.6

13.64

0.57

0.0269

0.4095

9.496

98.7

13.66

0.76

0.0062

0.2408

9.476

99.3

13.70

0.19

0.0134

0.5490

9.567

98.3

13.70

0.33

0.0159

2.953

10.29

91.5

13.72

0.24

0.0093

0.2350

9.492

99.3

13.73

0.61

0.0151

1.582

9.907

95.3

13.75

0.37

0.0546

0.7170

9.651

97.8

13.76

0.19

0.0149

-0.0925

9.425

100.3

13.77

0.29

0.0188

2.354

10.15

93.2

13.78

0.45

0.0475

0.6270

9.643

98.1

13.78

0.24

0.0137

1.410

9.894

95.8

13.81

0.51

0.0122

4.890

10.94

86.8

13.84

0.27

0.0111

0.3537

9.663

98.9

13.92

0.29

0.1462

4.122

10.94

89.0

14.18

0.78

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weighted Mean = 27.9 36.8

Plateau Age = 13.664 0.096

Irradiation Data

(39Ar/37Ar)Ca = 0.000700.00005

(36Ar/37Ar)Ca = 0.000260.00002

(38Ar/39Ar)K = 0.0119

 

(40Ar/39Ar)K = 0.00020.0003