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  1. 学術雑誌論文
  2. 洋雑誌

Molecular and Isotopic Composition of Volatiles in Gas Hydrates and in Sediment from the Joetsu Basin, Eastern Margin of the Japan Sea

https://kitami-it.repo.nii.ac.jp/records/7956
https://kitami-it.repo.nii.ac.jp/records/7956
cd6ed44e-9e02-4b26-a3e3-a09e3711e50b
名前 / ファイル ライセンス アクション
energies-08-04647_Molecular energies-08-04647_Molecular and isotopic composition of volatiles in gas hydrates and in sediment from the Joetsu Basin, eastern margin of the Japan Sea.pdf (2.7 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2015-09-04
タイトル
タイトル Molecular and Isotopic Composition of Volatiles in Gas Hydrates and in Sediment from the Joetsu Basin, Eastern Margin of the Japan Sea
言語 en
言語
言語 eng
キーワード
主題Scheme Other
主題 gas hydrate
キーワード
主題Scheme Other
主題 Japan Sea
キーワード
主題Scheme Other
主題 stable isotope
キーワード
主題Scheme Other
主題 neopentane
キーワード
主題Scheme Other
主題 biodegradation
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
アクセス権
アクセス権URI open access
著者 Hachikubo, Akihiro

× Hachikubo, Akihiro

en Hachikubo, Akihiro

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Yanagawa, Katsunori

× Yanagawa, Katsunori

en Yanagawa, Katsunori

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Tomaru, Hitoshi

× Tomaru, Hitoshi

en Tomaru, Hitoshi

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Lu, Hailong

× Lu, Hailong

en Lu, Hailong

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Matsumoto, Ryo

× Matsumoto, Ryo

en Matsumoto, Ryo

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抄録
内容記述タイプ Abstract
内容記述 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 profiles of methane, ethane, propane, CO2, and H2S in the sediments from the Joetsu Basin area showed shallow sulfate?methane interface (SMI) and high microbial methane production beneath the SMI depth. Relatively high concentrations of propane and neopentane (2,2-dimethylpropane) were detected in the headspace gases of the hydrate-bearing sediment cores obtained at Umitaka Spur and Joetsu Knoll. Propane and neopentane cannot be encaged in the structure I hydrate; therefore, they were probably excluded from the hydrate crystals during the structure I formation process and thus remained in the sediment and/or released from the small amounts of structure II hydrate that can host such large gas molecules. The lower concentrations of ethane and propane in the sediment, high δ13C of propane and isobutane, and below-detection normal butane and normal pentane at Umitaka Spur and Joetsu Knoll suggest biodegradation in the sediment layers.
書誌情報 Energies

巻 8, 号 6, p. 4647-4666, 発行日 2015
DOI
識別子タイプ DOI
関連識別子 http://doi.org/10.3390/en8064647
権利
権利情報 c 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access articledistributed under the terms and conditions of the Creative Commons Attribution license(http://creativecommons.org/licenses/by/4.0/).
出版者
出版者 MDPI
言語 en
著者版フラグ
言語 en
値 publisher
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
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