Sample

Isotopic research results

δ¹⁸O, ‰

⁴Не, 10⁻⁶ cm³/g

³Не/⁴Не, 10⁻⁶

⁴Не/²⁰Ne

⁴He/⁴⁰Ar

⁴⁰Ar ,10⁻⁶ cm³/g

⁴⁰Ar/³⁶Ar

Gabbro

+5.7

1.54

0.09

440

0.41

3.90

8186

Amphibolizated gabbro

−5.5

7.06

0.07

805

1.05

7.00

7718

Metasomatic rock

−7.3

0.72

0.26

131

0.12

6.20

4532

Metasomatic rock

−9.0

1.62

0.25

328

0.12

13.90

4895

Gneiss

+8.8

1.54

0.19

478

0.21

7.90

5832

Gneiss

+8.1

48.10

0.10

353

6.20

8.20

5247