Sources of Hydrocarbon Gases in the Kedr Mud Volcano, Southern Basin of Lake Baikal: Results of Experimental Studies

Sources of Hydrocarbon Gases in the Kedr Mud Volcano, Southern Basin of Lake Baikal: Results of Experimental Studies Full article

Journal

Lithology and Mineral Resources
ISSN: 0024-4902

Output data

Year: 2023, Volume: 58, Number: 6, Pages: 534-543 Pages count : 10 DOI: 10.1134/S0024490223700335

Tags

gas hydrates, mud volcanoes, carbon dioxide, secondary microbial methane, Lake Baikal, biodegradation, coal, Tankhoi Formation, siderite

Authors

Krylov A.A. ^1,2,3 , Khlystov O.M. ² , Semenov P.B. ¹ , Sagidullin A.K. ⁴ , Malyshev S.A. ¹ , Bukin S.V. ² , Vidischeva O.N. ⁵ , Manakov A.Yu. ⁴ , Ismagilov Z.R. ^6,7

Affiliations

1	Gramberg All-Russia Research Institute of Geology and Mineral Resources of the World Ocean (VNIIOkeangeologiya)
2	Limnological Institute, Siberian Branch, Russian Academy of Sciences
3	St. Petersburg State University
4	Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences
5	Lomonosov Moscow State University
6	Federal Research Center of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences
7	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences

Funding (1)

Ministry of Science and Higher Education of the Russian Federation

121031700321-3

Outcrops of the coal-bearing Tankhoi Formation (Oligocene–Pliocene), traced along the southern shore of Lake Baikal, submerge under its Southern Basin, where several hydrate-bearing zones of the focused hydrocarbon fluid discharge have been found. To test the hypothesis that coals of the Tankhoi Formation can be the sources of hydrocarbon gases in these zones, we collected coal samples from the Shakhterskaya Gorka outcrop. Experiment on gas generation from the selected samples was carried out in a special autoclave at a temperature of 90°C for eight months. This paper presents the obtained results, which confirm an important role of the process of gas generation from coals in the formation of fluids in the Kedr mud volcano. The further migration of gases was accompanied by the biodegradation and formation of secondary microbial methane due to CO2 reduction. This was one of the reasons for the carbon isotopic pattern observed in methane (heavier than –50‰ VPDB) and carbon dioxide (positive values) taken from the near-surface sediments and hydrates of the Kedr mud volcano, as well as for the significant enrichment of authigenic siderites in the heavy 13C isotope.

Krylov A.A. , Khlystov O.M. , Semenov P.B. , Sagidullin A.K. , Malyshev S.A. , Bukin S.V. , Vidischeva O.N. , Manakov A.Y. , Ismagilov Z.R.
Sources of Hydrocarbon Gases in the Kedr Mud Volcano, Southern Basin of Lake Baikal: Results of Experimental Studies
Lithology and Mineral Resources. 2023. V.58. N6. P.534-543. DOI: 10.1134/S0024490223700335 WOS Scopus РИНЦ OpenAlex

Крылов А.А. , Хлыстов О.М. , Семёнов П.Б. , Сагидуллин А.К. , Малышев С.А. , Букин С.В. , Видищева О.Н. , Манаков А.Ю. , Исмагилов З.Р.
Источники углеводородных газов в грязевом вулкане Кедр, Южная котловина озера Байкал: результаты экспериментальных исследований
Литология и полезные ископаемые. 2023. №6. С.542-553. DOI: 10.31857/S0024497X23700283 РИНЦ OpenAlex

Submitted:	May 21, 2023
Accepted:	Jun 29, 2023
Published print:	Jul 29, 2023

Web of science:	WOS:001103447100005
Scopus:	2-s2.0-85176412335
Elibrary:	56103954
OpenAlex:	W4388662151

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OpenAlex	1
Scopus	1
Web of science	1
Elibrary	1