Discrimination between unaltered and altered volcanic products based on Cu and Fe isotopic measurements
| Project/Area Number |
16K16372
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Natural disaster / Disaster prevention science
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| Research Institution | University of Tsukuba |
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Principal Investigator |
IKEHATA KEI 筑波大学, 生命環境系, 助教 (70622017)
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 火山噴出物 / マグマ水蒸気爆発 / 水蒸気爆発 / 水蒸気噴火 / 火山 / 岩石・鉱物・鉱床学 / 地球化学 |
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| Outline of Final Research Achievements |
Chemical compositions of tiny primary copper minerals in volcanic products of phreatic and phreatomagmatic eruptions are similar to those in volcanic products of a magmatic eruption. In contrast, Cu isotopic compositions for the tiny primary copper minerals in the volcanic products of phreatic and phreatomagmatic eruptions are different from those (primary magmatic values) in the volcanic products of a magmatic eruption. This suggests that these primary copper minerals in the volcanic products of phreatic and phreatomagmatic eruptions were affected by hydrothermal alteration or weathering.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の結果から、火山噴出物に含まれる銅鉱物の銅同位体比は、噴出物の変質の程度を評価する指標になり得ると考えられる。火山噴火の様式の一つであるマグマ噴火の噴出物は、主に未変質な火山ガラスや造岩鉱物からなる。マグマ噴火の前駆現象として、変質噴出物を含む水蒸気爆発やマグマ水蒸気爆発が発生することがある。従って、火山噴出物の変質の程度を把握することができれば、火山噴火推移予測に役に立つことが期待される。
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Report
(4 results)
Research Products
(29 results)
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[Presentation] 中部沖縄トラフ伊平屋北海丘熱水域海底下の熱水変質鉱物の地球化学的特徴2018
Author(s)
池端 慶, 服部浩一, 三橋武史, 黒澤正紀, 小室光世, 笹 公和, 石井聡, 三好陽子, 島田和彦, 戸塚修平, 石橋純一郎
Organizer
2018年度 資源地質学会第68回年会
Related Report
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[Presentation] Depiction of the sub-seafloor hydrothermal system in the Izena Hole, middle Okinawa Trough based on the whole rock chemical analyses and mineralogical observations of core samples2018
Author(s)
Takaya, Y., T., Yamasaki, T., Nagase, T., Yonezu, K., Ikehata, K., Totsuka, S., Nozaki, T., Ishibashi, J.-I., Kumagai, H., Maeda, L. and CK16-05 Cruise Members
Organizer
2018 AGU Fall Meeting
Related Report
Int'l Joint Research
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[Presentation] インドネシア、ジャワ中部スンドロ火山の噴火活動史2016
Author(s)
古川竜太, 高田亮, Oktory Prambada, Kartadinata Nugraha, Wiboyo Haryo, 中川光弘, 荒川洋二, 池端慶
Organizer
火山学会
Place of Presentation
山梨県富士吉田市、富士吉田市民会館
Year and Date
2016-10-13
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