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doi: 10.24412/2687-1092-2024-11-581-587
1 VNIIOkeangeologia, St. Petersburg, Russia 2 Saint Petersburg State University, St. Petersburg, Russia 3 Lomonosov Moscow State University, Moscow, Russia 4 Earth Cryosphere Institute, Tyumen, Russia
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Abstract. The paper shows that the use of data on the molecular composition of hydrocarbon gases allows differentiating the environments represented by ground ice samples in terms of the methane cycle (methanogenesis/methane oxidation). According to the data on the stable isotopic composition of methane, all the studied samples are characterized by the dominance of the acetate pathway of methanogenesis, which is typical of freshwater (sulfate-free) environments. The observed "shift" of the δ13C – CH4 values towards negative is probably due to the low temperatures of methanogenesis in the environments before freezing. Keywords: ground ice, dissolved organic matter, carbon dioxide, incubation experiments, biodegradable organic carbon
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Cite this article:
Semenov P.B., Kil A.O., Shatrova E.V., Belova N.G., Levochkina O.V., Leibman M.O., Oblogov G.E., Khomutov A.V., Streletskaya I.D. Molecular characteristics of hydrocarbon gases and isotopic composition of methane in ground ice samples as a key to understanding the state of the methane cycle // Relief and Quaternary deposits of the Arctic, Subarctic and North-West Russia. 2024. Issue 11. P. 581-587. doi: 10.24412/2687-1092-2024-11-581-587
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