GEOCHEMICAL CONDITIONS OF DEPOSITION IN THE UPPER DEVONIAN PRYPIAC' AND DNIPRO-DONETS EVAPORITE BASINS (BELARUS AND UKRAINE)
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dc.contributor.author | Petrychenko O.Y. | |
dc.contributor.author | Peryt T.M. | |
dc.date.accessioned | 2022-10-27T10:15:41Z | |
dc.date.available | 2022-10-27T10:15:41Z | |
dc.date.issued | 2004 | |
dc.identifier | https://elibrary.ru/item.asp?id=27799111 | |
dc.identifier.citation | Journal of Geology, 2004, 112, 5, 577-592 | |
dc.identifier.issn | 0022-1376 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/39185 | |
dc.description.abstract | Earlier studies of individual fluid inclusions in salt minerals of some Devonian evaporite basins showed that the brines in those basins were of chloride type with a high concentration of Ca2+. The genetic significance of this occurrence was subject to different interpretations. We have studied in detail samples taken from the East European Dnipro-Donets and Prypiac' evaporite basins aiming to establish the chemical composition of fluid inclusions in studied evaporites and then, using other geochemical information, to establish a geochemical model of the Devonian evaporite basins. Our study showed that salt deposition in the Devonian Dnipro-Donets and Prypiac' evaporite basins was because of intensive evaporation of mainly marine brines of chloride type with a relatively high Ca2+ content. In turn, the ratios between Na, K, and Mg corresponded to ratios in recent marine brines. Salt minerals precipitated in bottom water conditions. The occurrence of one-phase fluid inclusions indicates the temperatures of halite-precipitating brines <43°C. Gas content varied from 10 to 300 g/L and was controlled by the pressures existing at the basin bottom during halite growth. The recorded high Ca2+ contents, characteristic of brines in the Dnipro-Donets rift basin, is due to intensive discharge of connate highly mineralized Ca2+-rich solutions; however, the parent marine water was also Ca2+ rich. | |
dc.subject | Devonian | |
dc.title | GEOCHEMICAL CONDITIONS OF DEPOSITION IN THE UPPER DEVONIAN PRYPIAC' AND DNIPRO-DONETS EVAPORITE BASINS (BELARUS AND UKRAINE) | |
dc.type | Статья | |
dc.subject.age | Paleozoic::Devonian | |
dc.subject.age | Палеозой::Девонская | ru |
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