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
Tsunogai, Urumu
Ishibashi, Jun-ichiro
Utsumi, Motoo
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 |
|
|
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 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.1029/2007JB005476 |
関連情報 |
|
|
|
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,
p. none,
発行日 2008-08-22
|