FORMATION OF IGNEOUS COMPLEXES OF THE SALAIR PYRITE-POLYMETALLIC ORE FIELD (WEST SIBERIA)
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dc.contributor.author | Lapukhov A.S. | |
dc.contributor.author | Simonov V.A. | |
dc.contributor.author | Kovyazin S.V. | |
dc.date.accessioned | 2021-03-23T04:29:00Z | |
dc.date.available | 2021-03-23T04:29:00Z | |
dc.date.issued | 2001 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=14996454 | |
dc.identifier.citation | Russian Geology and Geophysics, 2001, 42, 8, 1186-1195 | |
dc.identifier.issn | 1068-7971 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/27033 | |
dc.description.abstract | Study of melt inclusions in quartz phenocrysts from quartz porphyries has clarified the composition of acid magmas of the Salair ore field. We have established that low-alkali rhyodacite melts of tholeiitic series actively participated in the formation of igneous complexes hosting barite-polymetallic deposits. The high temperatures of acid melts (1050-1165°C) evidence their relation with basaltic igneous systems. The Salair rhyodacite melts are shown to be geochemically similar to acid magmas of pyrite deposits in Tuva and the Southern Urals. A comparative analysis of the bulk chemical compositions of quartz porphyrites and melt inclusions in quartz phenocrysts has revealed that low-alkali rhyolites and rhyodacites of tholeiitic series are significantly metamorphosed to high-alkali andesite-dacites enriched in Na and Mg and depleted in Ca, with SiO2, TiO2, and A12O3 being their "inert components". A petrochemical analysis of rocks and melt inclusions has shown that some of the igneous complexes of the Salair ore field might have formed in the setting of a developing back-arc basin. | |
dc.title | FORMATION OF IGNEOUS COMPLEXES OF THE SALAIR PYRITE-POLYMETALLIC ORE FIELD (WEST SIBERIA) | |
dc.type | Статья |
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