| Project/Area Number |
63041063
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| Research Category |
Grant-in-Aid for Overseas Scientific Survey.
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| Allocation Type | Single-year Grants |
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| Section | Field Research |
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| Research Institution | Shinshu University, Department of Geology |
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Principal Investigator |
KURODA Yoshimasu Professor of the Department of Geology, Shinshu University, 理学部, 教授 (20015530)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUO Sadao Professor of the Department of Chemistry, Univ. of Electro-Communication, 教授 (30015490)
YAMAGUCHI Yoshiaki Associate Professor of the Department of Geology, Shinshu University, 理学部, 助教授 (50144689)
MARUYAMA Takahiko Professor of the Department of Mining Geology, Akita University, 鉱山学部, 教授 (60006682)
KANISAWA Satoshi Professor of the Department of Geology, Tohoku University, 教養部, 教授 (70005784)
YAMADA Tetsuo Professor of the Department of Geology, Shinshu University, 理学部, 教授 (30020647)
PERSSON Lars Research Stuff of the Geological Survey of Sweden
LINDH Anders Associated Professor of the Department of Geology, Lund University, Sweden
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| Project Period (FY) |
1988 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥10,100,000 (Direct Cost: ¥10,100,000)
Fiscal Year 1989: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1988: ¥8,000,000 (Direct Cost: ¥8,000,000)
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| Keywords | Continental Crust / Shield / Island arc / Granite / Water / Hydrogen isotope / Chemical composition / Hornblende / Biotite / Japanese islands / Baltic shield |
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| Research Abstract |
The most discriminated character of the continental crust is the presence of a great deal of granitic rocks, though the oceanic crust mainly consists of basaltic rocks.
Our project is to distinguish the continental crust in the island arc like Japanese islands and the Baltic shield through the investigation of the behaviour of D/H fractionation and Fe/Mg ratio between biotite and hornblende. We collected many specimens of granitic rocks from the Baltic shield, and separated biotite and hornblende, and then analysed the D/H ratio and chemistry of the minerals. The results are quite different from the characteristics of the Japanese granitic rocks. We suspect that the granitic rocks in the shield did not contain molecular water but those in the island arc did a plenty of water.
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