2010 Fiscal Year Final Research Report
Partial melting of the crust caused by heating of basalt magma-Generation of felsic magma in the subduction zone
| Project/Area Number |
20540463
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Niigata University |
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Principal Investigator |
SHUTO Kenji Niigata University, 自然科学系, フェロー (50143748)
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| Project Period (FY) |
2008 – 2010
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| Keywords | アセノスフェア / リソスフェア / 下部地殻 / 部分溶融 / 玄武岩 / フェルシック火山岩 / 西南北海道 / 北部北海道 |
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| Research Abstract |
The major- and trace-element compositions, and Sr and Nd isotopic data were presented for Oligocene to Quaternary basaltic and felsic volcanic rocks including dacite and rhyolite from Southwest Hokkaido and North Hokkiado. These data showed that felsic magmas were generated by partial melting of the lower crustal rocks beneath SW Hokkaido and North Hokkaido. Asthenosphere-derived basaltic magmas have both been erupted at the surface, and fluxed and heated the lower crust causing melting, and producing coeval felsic magmas.
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Research Products
(8 results)
