2017 Fiscal Year Final Research Report
An integrated study of Paleoproterozoic high-pressure intermediate-type metamorphic belt: Implication for the operation of modern-style subduction processes
| Project/Area Number |
15H05212
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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 |
Geology
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
平野 直人 東北大学, 東北アジア研究センター, 准教授 (00451831)
太田 努 岡山大学, 地球物質科学研究センター, 助手 (80379817)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 現行型沈み込み帯 / 高圧中間群変成帯 / 古原生代 / 高圧変成岩 / 変成岩岩石学 / 野外地質学 / タンザニア / 東アフリカ |
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| Outline of Final Research Achievements |
High-pressure intermediate-type metamorphic belt surrounding the late Archean Tanzania Craton experienced Pacific-type subduction zone metamorphism in Orosirian Period at ca. 2 Ga. Epidote-amphibolite-facies meta-pillow basalts of the belt had a mid-ocean ridge basalt-like affinity. Details of eclogite- and high-pressure granulite-facies metamorphism has also brought new insight into Paleoproterozoic Pacific-type subduction processes.
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| Free Research Field |
地質学
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