Structural Studies of Lake Baikal Natural Gas Hydrates
- Authors: Manakov A.Y.1,2, Khlystov O.M.3, Hachikubo A.4, Minami K.4, Yamashita S.4, Khabuev A.3, Ogienko A.G.1,2, Ildyakov A.V.1, Kalmychkov G.V.5, Rodionova T.V.1
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Affiliations:
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch
- Novosibirsk State University
- Limnological Institute, Siberian Branch
- Enviromental and Energy Resources Research Center
- Vinogradov Institute of Geochemistry, Siberian Branch
- Issue: Vol 60, No 9 (2019)
- Pages: 1437-1455
- Section: Article
- URL: https://journals.rcsi.science/0022-4766/article/view/162185
- DOI: https://doi.org/10.1134/S0022476619090087
- ID: 162185
Cite item
Abstract
The structure of near-bottom gas hydrate samples obtained in Lake Baikal during the expeditions in 2005–2018 are reported. The hydrates contain mainly methane and ethane. More than 85% of the samples contain hydrate of cubic structure I (sI) with up to 4.2 mol.% ethane. The concentration of ethane in the samples containing hydrate of cubic structure II (sII) is 12–14 mol.%. Refined unit cell parameters of natural hydrates are in good agreement with the data obtained in the studies of artificially synthesized hydrates. Possible mechanisms for the formation of sII hydrates are discussed. Some arguments are provided in favor of a probable presence of dispersed gas hydrates in the near-bottom layers of Baikal sediments and the possibility of small variations in the composition of hydrate gas in different hydrate fragments taken from the same hydrate layer.
Keywords
About the authors
A. Yu. Manakov
Nikolaev Institute of Inorganic Chemistry, Siberian Branch; Novosibirsk State University
Author for correspondence.
Email: manakov@niic.nsc.ru
Russian Federation, Novosibirsk; Novosibirsk
O. M. Khlystov
Limnological Institute, Siberian Branch
Email: manakov@niic.nsc.ru
Russian Federation, Irkutsk
A. Hachikubo
Enviromental and Energy Resources Research Center
Email: manakov@niic.nsc.ru
Japan, Koen-cho, Kitami
Kh. Minami
Enviromental and Energy Resources Research Center
Email: manakov@niic.nsc.ru
Japan, Koen-cho, Kitami
S. Yamashita
Enviromental and Energy Resources Research Center
Email: manakov@niic.nsc.ru
Japan, Koen-cho, Kitami
A. Khabuev
Limnological Institute, Siberian Branch
Email: manakov@niic.nsc.ru
Russian Federation, Irkutsk
A. G. Ogienko
Nikolaev Institute of Inorganic Chemistry, Siberian Branch; Novosibirsk State University
Email: manakov@niic.nsc.ru
Russian Federation, Novosibirsk; Novosibirsk
A. V. Ildyakov
Nikolaev Institute of Inorganic Chemistry, Siberian Branch
Email: manakov@niic.nsc.ru
Russian Federation, Novosibirsk
G. V. Kalmychkov
Vinogradov Institute of Geochemistry, Siberian Branch
Email: manakov@niic.nsc.ru
Russian Federation, Irkutsk
T. V. Rodionova
Nikolaev Institute of Inorganic Chemistry, Siberian Branch
Email: manakov@niic.nsc.ru
Russian Federation, Novosibirsk
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