Remote determinations on fumarole outlet temperatures in an eruptive volcano
Project/Area Number |
26610181
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Research Category |
Grant-in-Aid for Challenging Exploratory Research
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Allocation Type | Multi-year Fund |
Research Field |
Geochemistry/Cosmochemistry
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Research Institution | Nagoya University |
Principal Investigator |
Tsunogai Urumu 名古屋大学, 環境学研究科, 教授 (50313367)
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Project Period (FY) |
2014-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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Keywords | 火山 / 噴気温度 / 噴煙 / 水素 / 同位体組成 / 火山ガス / 航空機 / 質量分析 / 水素同位体 / 遠隔噴気温度測定 / HIReTS / 桜島 / 水素分子 |
Outline of Final Research Achievements |
We used aircraft to sample the volcanic plume ejected from Sakurajima volcano, where direct measurement of fumarole outlet temperature is impractical, in order to deduce the hydrogen isotopic composition (δD) of fumarolic H2 from excess H2 in the volcanic plume and thus remotely determine the outlet temperature. We successfully estimated that the δD of the fumarolic H2 in September and December 2014 was -135 ± 13‰ and -113±11‰, respectively, and that the outlet temperature was 1,050 ± 120°C and 1,199 ± 139°C, respectively. Although the temperatures were higher than those determined using infrared (IR) remote sensing, we concluded that they are reliable estimates of the highest fumarole outlet temperatures. Combined with sampling using aircraft, remote temperature-sensing based on the δD of H2 in volcanic plumes can be widely applied to active volcanoes to determine the highest fumarole outlet temperatures.
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Report
(3 results)
Research Products
(10 results)
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[Journal Article] Chemical and Isotopic Compositions of Hydrothermal Fluids at Snail, Archaean, Pika, and Urashima Sites in the Southern Mariana Trough.2015
Author(s)
Toki, T., J. Ishibashi, T. Noguchi, M. Tawata, U. Tsunogai, T. Yamanaka, and K. Nakamura
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Journal Title
Subseafloor Biosphere Linked to Hydrothermal Systems: TAIGA Concept
Volume: 1
Pages: 587-602
DOI
ISBN
9784431548645, 9784431548652
Related Report
Peer Reviewed / Open Access
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[Journal Article] Tarama Knoll: Geochemical and Biological Profiles of Hydrothermal Activity.2015
Author(s)
Yamanaka, T., H. Nagashio, R. Nishio, K. Kondo, T. Noguchi, K. Okamura, T. Nunoura, H. Makita, K. Nakamura, H. Watanabe, K. Inoue, T. Toki, K. Iguchi, U. Tsunogai, R. Nakada, S. Ohshima, S. Toyoda, J. Kawai, N. Yoshida, A. Ijiri, and M. Sunamura
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Journal Title
Subseafloor Biosphere Linked to Hydrothermal Systems: TAIGA Concept
Volume: 1
Pages: 497-504
DOI
ISBN
9784431548645, 9784431548652
Related Report
Peer Reviewed / Open Access
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[Journal Article] Hydrothermal plumes in the Gulf of Aden, as characterized from light transmission, Mn, Fe, CH4 and δ13C-CH4 anomalies.2015
Author(s)
Gamo, T., K. Okamura, H. Hatanaka, H. Hasumoto, D. Komatsu, M. Chinen, M. Mori, J. Tanaka, A. Hirota, U. Tsunogai, K. Tamaki
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Journal Title
Deep-Sea Research Part II
Volume: 121
Pages: 62-70
DOI
Related Report
Peer Reviewed
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