Gas hydrates from the continental slope,offshore Sakhalin Island,Okhotsk Sea |
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| Authors: | G D Ginsburg V A Soloviev R E Cranston T D Lorenson K A Kvenvolden |
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| Institution: | (1) Research Institute for Geology and Mineral Resources of the Ocean, Maklina pr. 1, 190121 St. Petersburg, Russia;(2) Atlantic Geoscience Center, Geological Survey of Canada, Box 1006, B2Y 4A2 Dartmouth, Nova Scotia, Canada;(3) U. S. Geological Survey, 345 Middlefield Road, MS-999 Menlo Park, California 94025, USA |
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| Abstract: | Ten gas-vent fields were discovered in the Okhotsk Sea on the northeast continental slope offshore from Sakhalin Island in water depths of 620—1040 m. At one vent field, estimated to be more than 250 m across, gas hydrates, containing mainly microbial methane ( 13C = –64.3 ), were recovered from subbottom depths of 0.3–1.2 m. The sediment, having lenses and bedded layers of gas hydrate, contained 30–40% hydrate per volume of wet sediment. Although gas hydrates were not recovered at other fields, geochemical and thermal measurements suggest that gas hydrates are present. |
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