2015 Fiscal Year Final Research Report
Geo-tectonic development of Japanese Island using detrital zircon and monazite U-Pb chronology
| Project/Area Number |
25400486
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | Hiroshima University |
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Principal Investigator |
Hayasaka Yasutaka 広島大学, 理学(系)研究科(研究院), 准教授 (10198830)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 日本列島 / 地質構造発達史 / 砕屑性ジルコン・モナザイト / ジルコンU-Pb年代 / LA-ICP-MS / 中・古生界 / ジュラ紀付加体 / 白亜紀花崗岩 |
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| Outline of Final Research Achievements |
Age population diagrams obtained from detrital zircon-monazite U-Pb analysis for the latest Triassic to early Jurassic units of both Inner and outer zones of Southwest Japan are clearly differ from each other. From this evidence, the accumulated displacement along MTL can be estimated at least 800 km or more.
The boundary between Abukuma Belt and Kitakami Belt can be traced from Hatagawa Tectonic Line passing through the Onikobe-Yuzawa mylonite zone, Kyowa-Hitachinai mylonite zone in the Taiheizan granitic complex and east of Mt. Shirakami to east of Okushiri island by zircon chronology for granitic rocks.
Mid to late Cretaceous Chugoku province was thoroughly covered by more than 1000 m thick ignimbrite whose onset was marked by eruption of Kisa andesite at 111 Ma.
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| Free Research Field |
地質学、岩石学、地質年代学
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