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Diversity of fluid geochemistry affected by processes during fluid upwelling in active hydrothermal fields in the Izena Hole, the middle Okinawa Trough back-arc basin

http://hdl.handle.net/20.500.12000/37725
http://hdl.handle.net/20.500.12000/37725
6fc1860d-e9e0-4e2d-a1e5-e43a7e5679aa
名前 / ファイル ライセンス アクション
48_2.0311.pdf 48_2.0311.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2018-02-09
タイトル
タイトル Diversity of fluid geochemistry affected by processes during fluid upwelling in active hydrothermal fields in the Izena Hole, the middle Okinawa Trough back-arc basin
言語 en
作成者 Ishibashi, Jun-Ichiro

× Ishibashi, Jun-Ichiro

en Ishibashi, Jun-Ichiro

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Noguchi, Takuroh

× Noguchi, Takuroh

en Noguchi, Takuroh

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Toki, Tomohiro

× Toki, Tomohiro

en Toki, Tomohiro

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Miyabe, Shunsuke

× Miyabe, Shunsuke

en Miyabe, Shunsuke

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Yamagami, Shosei

× Yamagami, Shosei

en Yamagami, Shosei

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Onishi, Yuji

× Onishi, Yuji

en Onishi, Yuji

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Yamanaka, Toshiro

× Yamanaka, Toshiro

en Yamanaka, Toshiro

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Yokoyama, Yuka

× Yokoyama, Yuka

en Yokoyama, Yuka

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Omori, Eriko

× Omori, Eriko

en Omori, Eriko

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Takahashi, Yoshio

× Takahashi, Yoshio

en Takahashi, Yoshio

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Hatada, Kenta

× Hatada, Kenta

en Hatada, Kenta

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Nakaguchi, Yuzuru

× Nakaguchi, Yuzuru

en Nakaguchi, Yuzuru

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Yoshizaki, Motoko

× Yoshizaki, Motoko

en Yoshizaki, Motoko

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Konno, Uta

× Konno, Uta

en Konno, Uta

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Shibuya, Takazo

× Shibuya, Takazo

en Shibuya, Takazo

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Takai, Ken

× Takai, Ken

en Takai, Ken

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Inagaki, Fumio

× Inagaki, Fumio

en Inagaki, Fumio

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Kawagucci, Shinsuke

× Kawagucci, Shinsuke

en Kawagucci, Shinsuke

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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
主題
言語 en
主題Scheme Other
主題 hydrothermal fluid circulation system
主題
言語 en
主題Scheme Other
主題 phase separation
主題
言語 en
主題Scheme Other
主題 fluid-sediment interactions
主題
言語 en
主題Scheme Other
主題 magmatic volatiles
主題
言語 en
主題Scheme Other
主題 thermal decomposition of organic matter
主題
言語 en
主題Scheme Other
主題 Okinawa Through
内容記述
内容記述タイプ Other
内容記述 Two active hydrothermal fields, Jade and Hakurei fields have been discovered within the Izena Hole, a rectangular 6 km × 3 km shape depression located in the middle Okinawa Trough back arc basin. In both fields, intense hydrothermal activity is represented by venting of high-temperature fluid (>300°C) and occurrence of sulfide/sulfate ore deposits. We collected hydrothermal fluids during dive expeditions of ROV Hyper Dolphin conducted in 2003, 2010 and 2011, in order to analyze both elemental and gas species. The geochemistry of high temperature hydrothermal fluids collected from the Jade and Hakurei fields is very similar to each other with exceptions in minor gas composition. Little temporal variation was observed in geochemistry of the high-temperature hydrothermal fluid of the Jade field over two decades, since a previous study carried out in 1989. These results suggest that these fluids are derived from a common fluid reservoir where fluid chemistry is basically controlled by fluid-mineral equilibria and gas species are dominantly contributed from the same magma. Venting of low temperature fluid (about 104°C) was discovered in the distal part of the Jade field, which was named as the Biwako vent. Chemical composition of the Biwako vent fluid was distinctive from that of the high temperature fluid in the proximal part of the Jade field, and could not be explained by simple dilution or cooling. This intra-field chemical diversity could be caused by phase separation and segregation during fluid upwelling, based on relationships in concentrations of Cl and major cations. On the other hand, the chemical diversity recognized in minor gas composition between the Jade and Hakurei fields is in accordance with results from previous plume survey. Difference in concentrations of minor gases such as H2 is attributed to contribution from thermal degradation of organic matter in the sediment, during fluid upwelling.
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 GEOCHEMICAL SOCIETY OF JAPAN
出版者
言語 ja
出版者 日本地球化学会
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/20.500.12000/37725
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/10.2343/geochemj.2.0311
関連情報
識別子タイプ DOI
関連識別子 info:doi/10.2343/geochemj.2.0311
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 1880-5973
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0016-7002
収録物名
言語 en
収録物名 Geochemical Journal
書誌情報
巻 48, 号 4, p. 357-369, 発行日 2014-07-31
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