The genesis of calcite in carbonate rocks of the sedimentary basins: Evidence from the stable carbon and oxygen isotopes composition

A. Yu Yurchenko

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1 Citation (Scopus)

Abstract

The distributions of stable carbon and oxygen isotopes in modern and ancient limestones of various types were studied. Carbonate samples from modern sediments were collected in the Black and Barents Seas. Ancient carbonates were represented by Upper Jurassic (Kimmeridgian-Tithonian) limestones from the central part of the West Siberian basin. Carbonate samples include remains of modern and Upper Jurassic fauna, carbonate crust from sediments of the Black Sea, carbonate tube from sediments of the Barents Sea, and Upper Jurassic limestone from the carbonate layer found at top of Abalak, bottom of Bazhenov deposits in the central part of the West Siberian basin. According to the results of the isotope analysis and comparison with modern carbonates, Upper Jurassic limestones of the West Siberian basin belong to the group of methane-derived carbonates and precipitated as a result of anaerobic oxidation of methane (AOM). Fractures in limestones are filled with secondary calcite.

Original languageEnglish
Pages (from-to)375-378
Number of pages4
JournalMoscow University Geology Bulletin
Volume69
Issue number5
DOIs
Publication statusPublished - 1 Sep 2014
Externally publishedYes

Keywords

  • anaerobic oxidation of methane
  • carbon and oxygen isotopes composition
  • limestone
  • methane-derived carbonates
  • West Siberia

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