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Possible variation in methane flux caused by gas hydrate formation on the northeastern continental slope off Sakhalin Island, Russia

Cited 2 time in scopus
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Title
Possible variation in methane flux caused by gas hydrate formation on the northeastern continental slope off Sakhalin Island, Russia
Other Titles
러시아 사할린 북동대륙사면의 가스하이드레이트 형성에 의한 메탄플럭스 변동가능성
Authors
Satoshi Yamashita
Nataliya Nikolaeva
Nobuo Takahashi
Hirotsugu Minami
Akihiro Hachikubo
Kazuya Tatsumi
Alexander Derkachev
Anatoly Obzhirov
Jin, Young Keun
Hitoshi Shoji
Hirotoshi Sakagami
Subject
Geology; Oceanography
Keywords
gas hydrate; methane flux; sakhalin slope; sediment; seepage
Issue Date
2012
Publisher
Springer
Citation
Satoshi Yamashita, et al. 2012. "Possible variation in methane flux caused by gas hydrate formation on the northeastern continental slope off Sakhalin Island, Russia". GEO-MARINE LETTERS, 32(5): 525-534.
Abstract
The Sakhalin Slope Gas Hydrate Project (SSGH) is an international collaborative effort by scientists from Japan, Korea and Russia to investigate natural gas hydrates (GHs) that have accumulated on the continental slope off Sakhalin Island. From 2009 to 2011, field operations of the SSGH-09, SSGH-10 and SSGH-11 projects were conducted. GH-bearing and -free sediment cores were retrieved using steel hydro- and gravity corers. The concentrations of sulfate ions in the sediment pore waters obtained during those cruises were measured to investigate the sulfate concentration-depth profile. Seventeen cores showed linear depth profiles of sulfate concentrations, whereas 8 cores and 2 cores showed the concave-up and - down profiles due to a sudden increase and decrease in the methane flux from below, respectively, presumably caused by the formation of gas hydrate adjacent to the core sampling sites.nd. From 2009 to 2011, field operations of the SSGH-09, SSGH-10 and SSGH-11 projects were conducted. GH-bearing and -free sediment cores were retrieved using steel hydro- and gravity corers. The concentrations of sulfate ions in the sediment pore waters obtained during those cruises were measured to investigate the sulfate concentration-depth profile. Seventeen cores showed linear depth profiles of sulfate concentrations, whereas 8 cores and 2 cores showed the concave-up and - down profiles due to a sudden increase and decrease in the methane flux from below, respectively, presumably caused by the formation of gas hydrate adjacent to the core sampling sites.
URI
http://repository.kopri.re.kr/handle/201206/5658
DOI
http://dx.doi.org/10.1007/s00367-012-0287-x
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