| Project/Area Number |
21403012
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Geochemistry/Astrochemistry
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| Research Institution | The University of Tokyo |
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Principal Investigator |
ORIHASHI Yuji 東京大学, 地震研究所, 助教 (70313046)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAI Shunichi 東京大学, 地震研究所, 教授 (50188869)
SUMINO Hirochika 東京大学, 理学系研究科, 助教 (90332593)
ANMA Ryo 筑波大学, 生命環境科学研究科, 講師 (70311595)
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| Co-Investigator(Renkei-kenkyūsha) |
MIBE Kenji 東京大学, 地震研究所, 助教 (10372426)
HONDA Satoru 東京大学, 地震研究所, 教授 (00219239)
NAGAO Keisuke 東京大学, 理学系研究科, 教授 (40131619)
HIRATA Daiji 神奈川県立生命の星・地球博物館, 学芸部, 学芸部長 (70132917)
IWAMORI Hikaru 東京工業大学, 理工学研究科, 教授 (80221795)
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| Project Period (FY) |
2009 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2010: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
Fiscal Year 2009: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
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| Keywords | マントル遷移層 / 超背弧地域 / 玄武岩 / マグマ成因 / 超背弧 / マグマ成因論 / パタゴニア地方 / パタゴニア / 玄武岩質マグマ / 地殻物質 |
|---|
| Research Abstract |
As a typical “extra back-arc” province in the world, we focused on the Somuncura-Canquel province, Patagonia, Argentina, and investigated their occurrence, collected the basaltic rocks and determined both their major & trace element compositions and K-Ar ages. Our results suggest the following scenario of its magmatism; uppermost “wet” mantle transition zone beneath the region might be up-warped triggered by the slab rotation of the Farallon-Nasca plate between 28 and 20 Ma, and a hydrous melt might beproduced to change hydrous wadsleyite to olivine in the up-warped parts.
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