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 |
Research Field |
Geology
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Research Institution | Okayama University of Science |
Principal Investigator |
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Project Period (FY) |
2016-08-26 – 2018-03-31
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Project Status |
Completed (Fiscal Year 2017)
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Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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Keywords | ヒマラヤ造山帯 / 地殻溶融 / 年代測定 / 変成岩 / 大陸衝突帯 / 地質年代学 / 岩石学 / 圧力ー温度経路 / 変成年代 / 高温変成岩 / 圧力ー温度ー時間経路 / 圧力-温度-時間経路 / 大陸衝突型 / ネパール |
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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Report
(3 results)
Research Products
(18 results)
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[Journal Article] Early Oligocene partial melting via biotite dehydration melting and prolonged low-pressure-low-temperature metamorphism of the upper High Himalaya Crystalline Sequences in far-eastern Nepal. In: Sharma, R., Villa, I. M. and Kumar, S. (eds.), Crustal Architecture and Evolution of the Himalaya-Karakoram-Tibet Orogen2018
Author(s)
Imayama, T., Takeshita, T., Yi, K. and Fukuyama, M.
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Journal Title
Geological Society, London, Special Publications
Volume: 481
Issue: 1
Pages: 1-27
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Tectonics of the Himalayas2017
Author(s)
酒井治孝、今山武志、吉田孝紀、朝日克彦
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Journal Title
The Journal of the Geological Society of Japan
Volume: 123
Issue: 6
Pages: 403-421
DOI
NAID
ISSN
0016-7630, 1349-9963
Year and Date
2017-06-15
Related Report
Peer Reviewed
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[Journal Article] Paleoproterozoic high-pressure metamorphic history of the Salma eclogite on the Kola Peninsula, Russia.2017
Author(s)
Imayama, T., Oh, C. W., Baltybaev, S. K., Park, C.S., Yi, K., and Jung, H.
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Journal Title
Lithosphere
Volume: 9
Issue: 6
Pages: 855-873
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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