V.A. Soloviev R.E. Cranston T.D. Lorenson K.A. Kvenvolden G.D. Ginsburg 1993 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. ?? 1993 Springer-Verlag. application/pdf 10.1007/BF01204391 en Gas hydrates from the continental slope, offshore Sakhalin Island, Okhotsk Sea article