| 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
Noguchi, Takuroh
Toki, Tomohiro
Miyabe, Shunsuke
Yamagami, Shosei
Onishi, Yuji
Yamanaka, Toshiro
Yokoyama, Yuka
Omori, Eriko
Takahashi, Yoshio
Hatada, Kenta
Nakaguchi, Yuzuru
Yoshizaki, Motoko
Konno, Uta
Shibuya, Takazo
Takai, Ken
Inagaki, Fumio
Kawagucci, Shinsuke
|
| 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 |
|
|
出版者 |
GEOCHEMICAL SOCIETY OF JAPAN |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
日本地球化学会 |
|
言語 |
ja |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 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 |
|
|
収録物名 |
Geochemical Journal |
|
言語 |
en |
| 書誌情報 |
巻 48,
号 4,
p. 357-369,
発行日 2014-07-31
|
48_2.0311.pdf
