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  1. 学術雑誌論文
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Methane enrichment in low-temperature hydrothermal fluids from the Suiyo Seamount in the Izu-Bonin Arc of the western Pacific Ocean

http://hdl.handle.net/20.500.12000/37647
http://hdl.handle.net/20.500.12000/37647
050ebf09-cfd7-44a3-9490-525f38568186
名前 / ファイル ライセンス アクション
Vol113noB8.pdf Vol113noB8.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2018-02-05
タイトル
タイトル Methane enrichment in low-temperature hydrothermal fluids from the Suiyo Seamount in the Izu-Bonin Arc of the western Pacific Ocean
言語 en
作成者 Toki, Tomohiro

× Toki, Tomohiro

en Toki, Tomohiro

Tsunogai, Urumu

× Tsunogai, Urumu

en Tsunogai, Urumu

Ishibashi, Jun-ichiro

× Ishibashi, Jun-ichiro

en Ishibashi, Jun-ichiro

Utsumi, Motoo

× Utsumi, Motoo

en Utsumi, Motoo

Game, Toshitaka

× Game, Toshitaka

en Game, Toshitaka

アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利情報
言語 en
権利情報 Copyright 2008 by the American Geophysical Union.
内容記述
内容記述タイプ Other
内容記述 [1] The gas geochemistries of high-temperature and low-temperature hydrothermal fluids (HTHFs and LTHFs, respectively) were studied for the Suiyo Seamount hydrothermal system (140°39′E, 28°33′N) in the southern Izu-Bonin (Ogasawara) Arc of the western Pacific Ocean. HTHFs (290 ± 20°C) were collected from four active vents using a gas-tight fluid sampler, which prevented the loss of volatile components through degassing during sample processing. The end-member CH4 concentrations were homogeneous across the vent fields. LTHFs were collected from four diffuse flow zones using a funnel, which was deployed on the seafloor with replacement of the seawater inside the funnel by the LTHF. Strong linear relationships were found among the concentrations of CH4, ΣCO2, and Si of the obtained samples, which ensured that the end-member chemical composition of the LTHFs could be accurately estimated. While the ΣCO2 concentrations of the HTHFs and LTHFs were similar, all four LTHFs showed enrichment of CH4 as compared to the HTHFs. The carbon isotopic composition of CH4 also revealed a significant difference: the LTHFs (δ13C(CH4) = −4.8 ± 0.3‰PDB) showed 13C enrichment, as compared to the HTHFs (δ13C(CH4) = −5.8 ± 0.4‰PDB). The 13C enrichment can be explained by a combination of microbial CH4 production and oxidation after formation of the LTHFs. On the basis of the observed differences in CH4 concentrations and carbon isotopic compositions of the HTHFs and LTHFs, microbial methane oxidation and production are estimated to have comparable impacts. These results support the notion of a subseafloor microbial consortium of methanogens and methanotrophs.
内容記述タイプ Other
内容記述 論文
出版者
言語 en
出版者 the American Geophysical Union
言語
言語 eng
資源タイプ
資源タイプ journal article
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
識別子
識別子 http://hdl.handle.net/20.500.12000/37647
識別子タイプ HDL
関連情報
関連識別子
識別子タイプ DOI
関連識別子 https://doi.org/10.1029/2007JB005476
関連識別子
識別子タイプ DOI
関連識別子 info:doi/10.1029/2007JB005476
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 2156-2202
収録物名
言語 en
収録物名 Journal of Geophysical Research
書誌情報
巻 113, 号 B8
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