| タイトル |
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en
Discovery of a new hydrothermal venting site in the southernmost Mariana Arc: Al-rich hydrothermal plumes and white smoker activity associated with biogenic methane
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| 作成者 |
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| アクセス権 |
open access |
| 主題 |
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Other
en
submarine hydrothermal activity
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Other
en
southern Mariana Trough
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Other
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hydrothermal plume chemistry
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Other
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aluminum anomaly
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Other
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biogenic methane
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NDC
450
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| 内容注記 |
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Abstract
en
This paper reports a series of studies leading to the discovery of a submarine hydrothermal field (called Nakayama Field) at an arc seamount (12∞43￠ N, 143∞32￠ E) in the southernmost part of the Mariana Trough, western Pacific Ocean. We first detected hydrothermal plumes characterized by water column anomalies of temperature, light transmission, Mn, Fe, Al, O2, CH4, and d13C of CH4 above the summit caldera of the seamount. Then deep-tow camera surveys confirmed the existence of hydrothermal activity inside the caldera, and an ROV dive finally discovered white smoker-type fluid venting associated with vent fauna. A high concentration of aluminum in the plume and white smoker-type emissions imply acidic hydrothermal activity similar to that observed at the DESMOS Caldera in the eastern Manus Basin, Papua New Guinea. Anomalously low d13C (CH4) of .38‰ of a vent fluid sample compared to other arc hydrothermal systems along the Izu- Bonin and Mariana Arcs suggests an incorporation of biogenic methane based on a subsurface microbial ecosystem.
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| 出版者 |
en
The Geochemical Society of Japan
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| 日付 |
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| 言語 |
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| 資源タイプ |
journal article |
| 出版タイプ |
VoR |
| 資源識別子 |
HDL
http://hdl.handle.net/2115/44839
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| 収録誌情報 |
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PISSN
0016-7002
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EISSN
1880-5973
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NCID
AA00654975
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en
Geochemical journal
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巻38
号6
開始ページ527
終了ページ534
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| ファイル |
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| コンテンツ更新日時 |
2023-07-26 |
