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Hachikubo, Akihiro; Yanagawa, Katsunori; Tomaru, Hitoshi; Lu, Hailong; Matsumoto, Ryo. |
Hydrate-bearing sediment cores were retrieved from the Joetsu Basin (off Joetsu city, Niigata Prefecture) at the eastern margin of the Japan Sea during the MD179 gas hydrates cruise onboard R/V Marion Dufresne in June 2010. We measured molecular and stable isotope compositions of volatiles bound in the gas hydrates and headspace gases obtained from sediments to clarify how the minor components of hydrocarbons affects to gas hydrate crystals. The hydrate-bound hydrocarbons at Umitaka Spur (southwestern Joetsu Basin) primarily consisted of thermogenic methane, whereas those at Joetsu Knoll (northwestern Joetsu Basin, about 15 km from Umitaka Spur) contained both thermogenic methane and a mixture of thermogenic and microbial methane. The depth concentration... |
Tipo: Text |
Palavras-chave: Gas hydrate; Japan Sea; Stable isotope; Neopentane; Biodegradation. |
Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00294/40493/39284.pdf |
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