№

Weight

mg

Concentration (ppm)

Isotope composition*

Isotope ratios and age in Ma**

%

Dis

Pb

U

²⁰⁶Pb/²⁰⁴Pb

²⁰⁶Pb/²³⁸U

±2σ

²⁰⁷Pb/²³⁵U

±2σ

²⁰⁷Pb/²⁰⁶Pb

±2σ

²⁰⁶Pb/²³⁸U

±2σ

²⁰⁷Pb/²³⁵U

±2σ

²⁰⁷Pb/²⁰⁶Pb

±2σ

Gabbronorite of Penikat

1

0.136

24.87

33.26

260.12

0.458 ± 0.004

9.929 ± 0.138

0.157 ± 0.002

2429 ± 21

2428 ± 34

2428 ± 24

−0.04

2

0.184

28.14

42.74

254.48

0.457 ± 0.004

9.845 ± 0.138

0.156 ± 0.002

2426 ± 21

2420 ± 34

2416 ± 24

−0.41