THE ORGANIC MATTER OF THE RECENT SEDIMENTS OF LAKE BELOE ( West Siberia ) ( from data of pyrolytic studies )
V.N. Melenevskii, G.A. Leonova, and A.S. Konyshev
A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
Keywords: Recent sediments, diagenesis, organic matter, pyrolysis, biomarker hydrocarbons
Pages: 583-592
Abstract
Study of the Holocene sediments of Lake Beloe (West Siberia) in the depth range 0-137 cm gave an insight into the transformation of organic matter (OM) at the early stages of diagenesis. Analysis of OM was performed by pyrolytic methods (Rock Eval and pyrolysis + chromato-mass spectrometry). It showed that the macromolecular aliphatic structure of the kerogen and the precursors of sterane and hopane geomolecules - sterenes and hopenes - form at the early stages of diagenesis. We suggest that macrophytes and bacteria are the main sources of OM for the lacustrine sediments.
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