Distribution and sources of carbon in metasomatic aureoles in terrigenous shales in the Baykal-Vitim geosyncline folded region

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Abstract

The geochemistry of carbon has been studied in three Proterozoic terrigenous-slate suites in the south of the Pre-Paleozoic folded margins of the Siberian platform that have various degrees of gold mineralization. The kerogen content and composition are independent of the grain size and composition of the reconstructed sedimentary rock types but are subject to metamorphic and metasomatic zoning. Conclusions are drawn on the polygenic origin of the shale kerogen in the metasomatic aureoles, which involved primary sedimentary (biogenic) carbon and endogenous carbon, and on the predominantly plutonic homogeneous source of the oxidized forms of carbon in the metasomatic carbonates. It is suggested that the endogenous carbon enters as heteroorganic compounds, one of the forms of metal transport in the plutonic fluids. Geochemical data sets should be based on the metamorphic and metasomatic zonation. -Journal summary

Original languageEnglish
Pages (from-to)26-35
Number of pages10
JournalGeochemistry International
Volume28
Issue number1
Publication statusPublished - 1991

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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