Sedimentary Event Recorded in Pelagic Sediments in the Circum-Pacific Mesozoic Accretionary Complexes
| Project/Area Number |
08640567
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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 |
Geology
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| Research Institution | Gifu University (1997)
Nagoya University (1996) |
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Principal Investigator |
KOJIMA Satoru Gifu University, Department of Civil Engineering, Professor, 工学部, 教授 (20170243)
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| Co-Investigator(Kenkyū-buntansha) |
TAKEUCHI Makoto Graduate School of Nagoya University, Department of Earth and Planetary Sciences, 大学院・理学研究科, 助教授 (80273217)
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1997: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1996: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | Mesozoic / accretionary complexes / sedimentary event / chert / Radiolaria |
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| Research Abstract |
1. We have made field surveys in the Inner zone of Southwest Japan (Mino, Tamba and Ultra-Tamba terranes) and in Northeast Japan (Kitakami terrane), and collected samples of event-related rocks already found and looked for the new event-related rocks. We could find event-related rocks in chert distributed in Gujo-Hachiman, and estimated it to be Permian in age on the basis of the accompanied rocks.
2. We have characterized the clastic grains in event-related rocks. The methods we used include observation by microscope, chemical analysis by EPMA,and chemical mapping by XGT.We could find glauconite-like minerals in the event-related rocks in the Hisuikyo area and dolomite clasts in the Ozaki area. These findings constraint the origin of the event-related rocks.
3. Mesozoic accretionary complexes similar to those in Southwest Japan widely occur in Far East Russia. We examined the event-related rocks in the Samarka terrane, Jurassic accretionary complex, in Sikhote-Alin. As the result the event-related rocks are very similar to those in the Jurassic accretionary complex in Southwest Japan in composition, age, occurrence and depositional processes.
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Report
(3 results)
Research Products
(6 results)
