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HYDROCARBON SEEPAGE AND FORMATION OF AUTHIGENIC MINERALS IN THE PERMAFROST OF WEST SIBERIA
Session: Geocryology II / Géocryologie II
Anna N. Kurchatova, 1 - Tyumen State Oil and Gas University, Tyumen, Russia; 2 - Institute of the Earth Cryosphere, Siberian Branch of the Russian Academy of Sciences, Tyumen, Russia (Russia)
Victor V. Rogov, 1 - Lomonosov Moscow State University, Moscow, Russia (Russia)
The first overview of the major hydrocarbon-induced chemical and mineralogic changes affecting permafrost sequences was presented. Long-term leakage of hydrocarbons, either as macroseepage or microseepage, set up near-surface oxidation-reduction zones that favor the bacterial activity and the formation of the authigenic mineral association of carbonates, iron sulfides and oxides and siliceous microspheres.
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