TERPANES AND STERANES IN COALS OF DIFFERENT GENETIC TYPES IN SIBERIA
V.A. Kashirtsev a , V.I. Moskvina, A.N. Fomina, and O.N. Chalayab
a A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
b Institute of Petroleum Problems, Siberian Branch of the Russian Academy of Sciences, 1 ul. Oktyabr’skaya, Yakutsk, 677891, Russia
Keywords: Humic and sapropelic coals, liptobioliths, hydrocarbon biomarkers, steranes, terpanes, Kuznetsk Basin, Lena Coal Basin
Pages: 404-411
Abstract
Chloroform extracts of coals of different genetic groups and different ages have been studied by chromato-mass-spectrometry, namely, Devonian liptobioliths from the Barzas region (Kuznetsk Basin) and Lower Cretaceous humites and sapropelites from the Kangalas and Taimylyr deposits, respectively (Lena Coal Basin). It has been established that the most ancient Devonian liptobioliths formed in coastal environments. Lipids of different biotas of marine and continental genesis, including resins of early Conifers, were the source of biomarker molecules. The Mesozoic humic and sapropelic coals differ little in chemofossil biomarkers, which might be related to their significant bacterial transformation and biosynthesis of chemofossils mainly by prokaryotes.
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