2017 Fiscal Year Final Research Report
Earlier crutal melting and its role in the Himalayan orogen
| Project/Area Number |
16H07376
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Geology
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| Research Institution | Okayama University of Science |
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Principal Investigator |
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| Project Period (FY) |
2016-08-26 – 2018-03-31
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| Keywords | ヒマラヤ造山帯 / 地殻溶融 / 年代測定 / 変成岩 |
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| Outline of Final Research Achievements |
U-Pb Zircon and monazite age dating revealed that the gneisses from the upper High Himalaya Crystalline Sequence (HHCS) in eastern Nepal experienced the earlier crustal melting in the Himalaya, accompanied by biotite dehydration melting at 35-25 Ma, and then the metamorphism continued up to ca. 17 Ma. Moreover, we newly found that the multiple shear zone and two-stage partial melting events in the HHCS along Bhagirathi river in the Uttarakhand area, northwest India. This is probably a first discovery on the earlier shear zone and crustal melting event in western Himalaya area.
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| Free Research Field |
テクトニクス
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