| Project/Area Number |
26287134
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Economic geology
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
仙田 量子 国立研究開発法人海洋研究開発機構, 地球内部物質循環研究分野, 研究員 (50377991)
浜田 盛久 (濱田 盛久) 国立研究開発法人海洋研究開発機構, 地球内部物質循環研究分野, 研究員 (60456853)
鈴木 勝彦 国立研究開発法人海洋研究開発機構, 海底資源研究開発センター, グループリーダー (70251329)
針金 由美子 国立研究開発法人産業技術総合研究所, 地質情報研究部門, 研究員 (90569360)
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| Co-Investigator(Renkei-kenkyūsha) |
TAMURA Akihiro 金沢大学, 自然システム学系, 博士研究員 (80401884)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2016: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2015: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
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| Keywords | 海洋プレート / 海洋マントル / 部分溶融 / かんらん岩 / マントルかんらん岩 / 再肥沃化 / 島弧下マントル / 交代作用 / 中央海嶺 / マントル / 物質循環 / メルトーマントル反応 / モホ面 / 元素循環 / 深海性かんらん岩 / 地殻物質リサイクリング / モホ / マントル掘削 |
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| Outline of Final Research Achievements |
Results of this research on the sub-oceanic mantle peridotites are summarized as follows. 1) We suggested possibility of existence of ancient melted residue in abyssal peridotites recovered from mid-ocean ridge system (Indian Ocean) and its “crustallization” processes by melt-residual peridotite interactions. Addition to this, melting processes selectively accumulated ancient melting geochemical signatures by melt-rock interactions. 2) We clarified mid-ocean ridge type peridotite origin for mantle section of the Eastern end of the Jurassic-Cretaceous ophiolite belt (Tethys ophiolite belt), Andaman Ophiolite, and its modification at subduction setting during the initiation of subduction. 3) We examined back-arc magmatic processes deduced from peridotite xenolith in back arc region (Japan Sea). Our results suggest that the late stage of magma process is similar to those expected beneath Mid-ocean ridge setting, resulting in the similar depleted peridotites in both tectonic settings.
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