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Crystallization of authigenic carbonates in mud volcanoes at Lake Baikal
Krylov, A. A.; Khlystov, O.M.; Zemskaya, T. I.; Minami, H.; Hachikubo, A.; Shoji, H.; Kida, M.; Pogodaeva, T. P.; Naudts, L.; Poort, J. (2008). Crystallization of authigenic carbonates in mud volcanoes at Lake Baikal. Geochem. Int. 46(10): 985-995. dx.doi.org/10.1134/S0016702908100030
In: Geochemistry International. Nauka/Interperiodica Publishing: Moscow. ISSN 0016-7029; e-ISSN 1556-1968, more
Peer reviewed article  
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  • Krylov, A. A.
  • Khlystov, O.M.
  • Zemskaya, T. I.
  • Minami, H.
  • Hachikubo, A.
  • Shoji, H.
  • Kida, M.
  • Pogodaeva, T. P.
  • Naudts, L., more
  • Poort, J., more
Abstract
    This paper presents data on authigenic siderite first found in surface sediments from mud volcanoes in the Central (K-2) and Southern (Malen’kii) basins of Lake Baikal. Ca is the predominant cation, which substitutes Fe in the crystalline lattice of siderite. The enrichment of the carbonates in the 13C isotope (from +3.3 to +6.8‰ for the Malen’kii volcano and from +17.7 to +21.9‰ for K-2) results from the crystallization of the carbonates during methane generation via the bacterial destruction of organic matter (acetate). The overall depletion of the carbonates in 18O is mainly inherited from the isotopic composition of Baikal water.
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