2024-03-29T16:00:39Z
https://kitami-it.repo.nii.ac.jp/oai
oai:kitami-it.repo.nii.ac.jp:00007276
2022-12-13T02:24:56Z
1:87
Coexistence of structure I and II gas hydrates in Lake Baikal suggesting gas sources from microbial and thermogenic origin
Kida, Masato
Khlystov, Oleg
Zemskaya, Tamara
Takahashi, Nobuo
Minami, Hirotsugu
Sakagami, Hirotoshi
Krylov, Alexey
Hachikubo, Akihiro
Yamashita, Satoshi
Shoji, Hitoshi
Poort, Jeffrey
Naudts, Lieven
open access
hydrate
structure II
Lake Baikal
We report the field observation of hydrate deposits of different crystal structures in the same cores of a mud volcano in the Kukuy Canyon. We link those deposits to chemical fractionation during gas hydrate crystallization. Gas composition and crystallographic analyses of hydrate samples reveal involvement of two distinct gas source types in gas hydrate formation at present or in the past: microbial (methane) and thermogenic (methane and ethane) gas types. The clathrate structure II, observed for the first time in fresh water sediments, is believed to be formed by higher mixing of thermogenic gas.
An edited version of this paper was published by AGU. Copyright 2006 American Geophysical Union.
application/pdf
The American Geophysical Union
2006
eng
journal article
AM
https://kitami-it.repo.nii.ac.jp/records/7276
http://doi.org/10.1029/2006GL028296
GEOPHYSICAL RESEARCH LETTERS
33
L24603
1
4
https://kitami-it.repo.nii.ac.jp/record/7276/files/grl_33_l24603.pdf
application/pdf
235.9 kB
2016-11-22