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 (δ13C = −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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Ginsburg, G.D., Soloviev, V.A., Cranston, R.E. et al. Gas hydrates from the continental slope, offshore Sakhalin Island, Okhotsk Sea. Geo-Marine Letters 13, 41–48 (1993). https://doi.org/10.1007/BF01204391
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DOI: https://doi.org/10.1007/BF01204391