Fossil travertines and quasi-travertine in the Minusa basin (West Siberia): structure, composition, and comparative analysis

G. S. Fedoseev, A. A. Vorontsov, A. A. Orekhov

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We study a carbonate body looking like a classical fossil travertine which was discovered in the Chebaki-Balakhta basin within the Minusa trough (Khakassia, Russia) and called quasi-travertine. It is a thin layer sandwiched between a basalt-dolerite sill and calcareous siltstone. Comprehensive studies of the quasi-travertine and its comparison with Devonian fossil travertines located a few kilometers away in terms of structure and composition have made the basis for its formation model. According to this model, the quasi-travertine has had a two-stage history: deposition and subsequent hydrothermal metasomatism. Laminated limestone coexisting with calcareous siltstone of the Early Devonian Shunet Formation formed during the first stage and then experienced hydrothermal metasomatism with precipitation of secondary calcite, prehnite, and pyrobitumen (kerite).

    Original languageEnglish
    Pages (from-to)922-934
    Number of pages13
    JournalRussian Geology and Geophysics
    Volume58
    Issue number8
    DOIs
    Publication statusPublished - 1 Aug 2017

    Keywords

    • basalt
    • dolerite
    • fossil travertine
    • Minusa basin
    • prehnite
    • quasi-travertine
    • shallow sill
    • sparite
    • CARBONATES
    • LATE QUATERNARY
    • STROMATOLITES
    • TROUGH

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