Spot

% ²⁰⁶Pb_c

ppm U

ppm Th

ppm ²⁰⁶Pb*

²³²Th²³⁸U

(1) ²⁰⁶Pb ²³⁸U Age

(1) ²⁰⁷Pb ²⁰⁶Pb Age

% Discor- dant

(1) ²³⁸U ²⁰⁶Pb^*

±%

(1) ²⁰⁷Pb^{* 206}Pb^*

±%

(1) ²⁰⁷Pb^{* 235}U

±%

(1) ²⁰⁶Pb^{* 238}U

±%

err corr

F09-08_6.1

--

232

298

100.0

1.32

2622

±27

2794

±9

+8

1.99

1.2

0.1961

0.52

13.6

1.3

0.502

1.2

0.92

F09-08_7.1

0.05

141

91

66.3

0.67

2815

±32

2803

±14

−1

1.83

1.4

0.1971

0.85

14.9

1.7

0.548

1.4

0.86

F09-08_3.1

0.06

44

34

20.4

0.80

2763

±43

2850

±18

+4

1.87

1.9

0.2029

1.10

15.0

2.2

0.535

1.9

0.87

F09-08_2.1

--

126

100

60.0

0.82

2839

±35

2886

±13

+2

1.81

1.5

0.2075

0.78

15.8

1.7

0.553

1.5

0.89

F09-08_5.1

--

125

157

60.6

1.30

2878

±33

2924

±12

+2

1.78

1.4

0.2125

0.71

16.5

1.6

0.563

1.4

0.89

F09-08_4.1

--

135

119

69.8

0.91

3039

±34

3006

±10

−1

1.66

1.4

0.2235

0.60

18.6

1.5

0.602

1.4

0.92

F09-08_1.1

0.04

281

108

189.5

0.40

3740

±39

3695

±6

−2

1.27

1.4

0.3473

0.39

37.7

1.4

0.786

1.4

0.96