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

抄録

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.

収録刊行物

• GEOPHYSICAL RESEARCH LETTERS

  GEOPHYSICAL RESEARCH LETTERS 33 (L24603), 1-4, 2006

  The American Geophysical Union

キーワード

• hydrate
• structure II
• Lake Baikal

詳細情報

• CRID: 1050001338808028928
• NII論文ID: 120002830252
• Web Site: https://kitami-it.repo.nii.ac.jp/records/7276
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles