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 |
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タイトル |
Origin and transport of pore fluids in the Nankai accretionary prism inferred from chemical and isotopic compositions of pore water at cold seep sites off Kumano |
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言語 |
en |
作成者 |
Toki, Tomohiro
Higa, Ryosaku
Ijiri, Akira
Tsunogai, Urumu
Ashi, Juichiro
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アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Cold seep |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Pore fluid |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Nankai Trough |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Accretionary prism |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Kumano |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Boron |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Lithium |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Clay mineral dehydration |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Methane hydrate dissociation |
内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
We used push corers during manned submersible dives to obtain sediment samples of up to 30 cm from the subseafloor at the Oomine Ridge. The concentrations of B in pore water extracted from the sediment samples from cold seep sites were higher than could be explained by organic matter decomposition, suggesting that the seepage fluid at the site was influenced by B derived from smectite-illite alteration, which occurs between 50°C and 160°C. Although the negative δ18OH2O and δDH2O values of the pore fluids cannot be explained by freshwater derived from clay mineral dehydration (CMD), we considered the contribution of pore fluids in the shallow sediments of the accretionary prism, which showed negative δ18OH2O and δDH2O values according to the results obtained during Integrated Ocean Drilling Program (IODP) Expeditions 315 and 316. We calculated the mixing ratios based on a four-end-member mixing model including freshwater derived from CMD, pore fluids in the shallow (SPF) accretionary prism sediment, seawater (SW), and freshwater derived from methane hydrate (MH) dissociation. However, the Oomine seep fluids were unable to be explained without four end members, suggesting that deep-sourced fluids in the accretionary prism influenced the seeping fluids from this area. This finding presents the first evidence of deep-sourced fluids at cold seep sites in the Oomine Ridge, indicating that a megasplay fault is a potential pathway for the deep-sourced fluids. |
内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
論文 |
出版者 |
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言語 |
en |
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出版者 |
Springer Open |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ |
journal article |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
識別子 |
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識別子 |
http://hdl.handle.net/20.500.12000/37652 |
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識別子タイプ |
HDL |
関連情報 |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1186/s40623-014-0137-3 |
関連情報 |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1186/s40623-014-0137-3 |
収録物識別子 |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1880-5981 |
収録物名 |
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言語 |
en |
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収録物名 |
Earth, Planets and Space |
書誌情報 |
巻 66,
号 137,
p. none,
発行日 2014
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