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one publication added to basket [199867]

Gas hydrate forming fluids on the NE Sakhalin slope, Sea of Okhotsk Mazurenko, L.L.; Matveeva, T.V.; Prasolov, E.M.; Shoji, H.; Obzhirov, A.I.; Jin, Y.K.; Poort, J.; Logvina, E.A.; Minami, H.; Sakagami, H.; Hachikubo, A.; Salomatin, A.S.; Salyuk, A.N.; Prilepskiy, E.B.; CHAOS 2003 Scientific Team (2009). Gas hydrate forming fluids on the NE Sakhalin slope, Sea of Okhotsk, in: Long, D. et al. (Ed.) Sediment-hosted gas hydrates: new insights on natural and synthetic systems. Geological Society Special Publication, 319: pp. 51-72 In: Long, D. et al. (2009). Sediment-hosted gas hydrates: New insights on natural and synthetic systems. Geological Society Special Publication, 319. The Geological Society: London. ISBN 978-1-86239-279-3. 192 pp. https://dx.doi.org/10.1144/SP319.1 In: Hartley, A.J. et al. (Ed.) Geological Society Special Publication. Geological Society of London: Oxford; London; Edinburgh; Boston, Mass.; Carlton, Vic.. ISSN 0305-8719; e-ISSN 2041-4927

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 215889 [ download pdf ]

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Trefwoord

Marien/Kust

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Auteurs		Top
Mazurenko, L.L. Matveeva, T.V. Prasolov, E.M. Shoji, H. Obzhirov, A.I.	Jin, Y.K. Poort, J. Logvina, E.A. Minami, H. Sakagami, H.	Hachikubo, A. Salomatin, A.S. Salyuk, A.N. Prilepskiy, E.B. CHAOS 2003 Scientific Team

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Abstract

An area of focused fluid venting off NE Sakhalin, Sea of Okhotsk, was investigated in 2003 during the 3 1 st and 32nd international expeditions of R/V Akademik M. A. Lavrenryev within the framework of the CHAOS Project. More than 40 structures related to seafloor gas venting were discovered and gas hydrates were sampled from three of these: CHAOS, Hieroglyph and Kitami. Geochemical analyses were used to define the mechanisms of gas hydrate accumulation and the sources of fluids involved. Chemical and isotopic analyses of the interstitial and hydrate waters suggest that hydrates were formed from seawater (or in-situ pore water) and an ascending fluid enriched in salts. Hydrate formation occurs at locations of the most intensive saline water upflow, and this is probably a function of the gas solubility in water in equilibrium with hydrate. The water involved in gas hydrate formation consists of about 70% pore water derived from the host sediment and 30% from the ascending fluid. The overall isotopic composition of the 'fluid' taking part in hydrate formation was calculated as d²H ? -11% and d18O ? -1, 5 ‰

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