| Project/Area Number |
16K20922
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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 |
Petrology/Mineralogy/Economic geology
Geochemistry/Cosmochemistry
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| Research Institution | Akita University |
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Principal Investigator |
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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 |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 流体包有物 / LA-ICP-MS / 元素分析 / ヒスイ輝石 / 沈み込み帯 / レーザーアブレーション / 誘導結合プラズマ質量分析 / 多元素同時分析 / 微小領域分析 / 岩石ー流体反応 / 誘導結合プラズマ質量分析装置 / 岩石・鉱物・鉱床学 / 地球化学 |
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| Outline of Final Research Achievements |
In-situ analysis of individual fluid inclusion by LA-ICP-MS has been established to understand the elemental mobility through fluid. This analytical method applied to the fluid inclusions in the jadeite-quartz rocks, which formed by fluid-rock interaction in a subduction zone. The results show that the fluid in the subduction zone is enriched in LILE (large ion lithophile elements), Li, B, and transition metals with relatively HFSE (high field strength elements) depleted characteristics. The HFSE accumulate into minerals through multi-stage processes of fluid-rock interactions at the different depths in the subduction zone.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で確立したLA-ICP-MSによる個々の流体包有物の元素分析は、流体―岩石反応に関する研究や鉱物資源成因研究、地熱帯の熱水組成の研究だけでなく、過去の海水組成の推定といった過去の地質環境を復元する研究や生命の発生を知る手がかりを得るのに有効であるため、今後、幅広い研究分野での適用が期待される。
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