TY - JOUR
T1 - Chemical characteristics of newly discovered black smoker fluids and associated hydrothermal plumes at the Rodriguez Triple Junction, Central Indian Ridge
AU - Gamo, Toshitaka
AU - Chiba, Hitoshi
AU - Yamanaka, Toshiro
AU - Okudaira, Takamoto
AU - Hashimoto, Jun
AU - Tsuchida, Shinji
AU - Ishibashi, Jun ichiro
AU - Kataoka, Satoshi
AU - Tsunogai, Urumu
AU - Okamura, Kei
AU - Sano, Yuji
AU - Shinjo, Ryuichi
N1 - Funding Information:
The authors wish to thank M. Miyamoto and the Deep Tow operation team, K. Hirata and the ROV Kaiko operation team, S. Ishida and the crew of R/V Kairei , and the shipboard scientific party for their invaluable collaboration. Thanks are also due to F. Kouzuma and A. Hirota for the measurement of CH 4 and its δ 13 C. Comments from R. James, J. Alt, and an anonymous reviewer were useful for revising the initial manuscript. This study was partly supported by a grant-in-aid for Scientific Research (A) from JSPS (No. 11308020) and by a Special Coordination Fund of MEXT ‘Archaean Park’ project. [AH]
PY - 2001
Y1 - 2001
N2 - The chemical characteristics of hydrothermal fluids in the Indian Ocean have been revealed for the first time. A hydrothermal field (called the Kairei field), including active black smoker chimneys, was discovered by ROV Kaiko dives at 25°19.17′S, 70°02.40′E (~ 2450 m depth) on the southwestern flank of an off-axis knoll located ~ 15 miles north of the Rodriguez Triple Junction, Central Indian Ridge, after detailed tow-yo surveys of the hydrothermal plume distribution. The temperature of the fluid expelled from the most active chimney was almost stable (359-360°C) throughout three successive days of fluid sampling. The endmember fluid has a chemical composition similar to the hydrothermal fluids sampled from sediment-starved mid-ocean ridges in the Pacific and the Atlantic oceans, suggesting typical interactions between hot fluid and mid-ocean ridge basalts in the subseafloor reaction zone.
AB - The chemical characteristics of hydrothermal fluids in the Indian Ocean have been revealed for the first time. A hydrothermal field (called the Kairei field), including active black smoker chimneys, was discovered by ROV Kaiko dives at 25°19.17′S, 70°02.40′E (~ 2450 m depth) on the southwestern flank of an off-axis knoll located ~ 15 miles north of the Rodriguez Triple Junction, Central Indian Ridge, after detailed tow-yo surveys of the hydrothermal plume distribution. The temperature of the fluid expelled from the most active chimney was almost stable (359-360°C) throughout three successive days of fluid sampling. The endmember fluid has a chemical composition similar to the hydrothermal fluids sampled from sediment-starved mid-ocean ridges in the Pacific and the Atlantic oceans, suggesting typical interactions between hot fluid and mid-ocean ridge basalts in the subseafloor reaction zone.
KW - Black Smokers
KW - Central Indian Ridge
KW - Geochemistry
KW - Hydrothermal vents
KW - Plumes
KW - Rodriguez Triple Junction
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U2 - 10.1016/S0012-821X(01)00511-8
DO - 10.1016/S0012-821X(01)00511-8
M3 - Article
AN - SCOPUS:0035688594
VL - 193
SP - 371
EP - 379
JO - Earth and Planetary Sciences Letters
JF - Earth and Planetary Sciences Letters
SN - 0012-821X
IS - 3-4
ER -