HELIUM ISOTOPES, TECTONICS AND HEAT FLOW IN THE NORTHERN CAUCASUS
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dc.contributor.author | Polyak B.G. | |
dc.contributor.author | Yakovlev L.E. | |
dc.contributor.author | Tolstikhin I.N. | |
dc.contributor.author | Kamensky I.L. | |
dc.contributor.author | Marty B. | |
dc.contributor.author | Cheshko A.L. | |
dc.date.accessioned | 2021-01-29T03:36:30Z | |
dc.date.available | 2021-01-29T03:36:30Z | |
dc.date.issued | 2000 | |
dc.identifier | https://elibrary.ru/item.asp?id=13352286 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 2000, 64, 11, 1925-1944 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/23921 | |
dc.description.abstract | 109 new measurements of ³He/⁴He ≡ R in subsurface fluids of the Northern Caucasus coupled with the data obtained previously allow regional regularities in the distribution of helium isotopic composition to be examined. Cis-Caucasian foredeeps show the lowest radiogenic R-values. The average Rav-value is slightly higher in gases of the Scythian plate beyond the Stavropol arch. Within the arch, elevated R = (1.6–4.5) × 10⁻⁷ indicates an input of mantle-derived helium. This input is even more evident to the south of Starvropol arch, in the Caucasian Mineral Water area, where the ≈8 Ma old laccolithes occur and R-values approach (5–11) × 10⁻⁷. The highest R-values, up to (0.7–0.9) × 10⁻⁵, are observed further to the south, in the central segment of the Greater Caucasus, where recent volcanism is manifested. Enhanced R-values do not correlate with the crustal thickness but reflect degassing of magmatic reservoirs including those yet unknown. | |
dc.title | HELIUM ISOTOPES, TECTONICS AND HEAT FLOW IN THE NORTHERN CAUCASUS | |
dc.type | Статья |
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