| Project/Area Number |
11308002
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
自然地理学
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
OKUMURA Koji Hiroshima University, Graduate School of Letters, Associate Professor, 大学院・文学研究科, 助教授 (10291478)
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| Co-Investigator(Kenkyū-buntansha) |
KAYANNE Hajime Tokyo University, Graduate School of Science, Associate Professor, 大学院・理学系研究科, 助教授 (60192548)
NAKAMURA Toshio Nagoya University, Center for Chronological Research, Professor, 年代測定総合研究センター, 教授 (10135387)
UMITSU Masatomo Nagoya University, Graduate School of Environmental Studies, Professor, 大学院・環境学研究科, 教授 (50127883)
SUZUKI Takehiko Tokyo Metropolitan University, Graduate School of Science, Assistant Professor, 大学院・理学研究科, 助手 (60240941)
NAGAOKA Shinji Nagasaki University, Faculty of Education, Associate Professor, 教育学部, 助教授 (80244028)
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| Project Period (FY) |
1999 – 2001
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| Keywords | Radiocarbon dating / High-precision date / Post Glacial Age / Volcanic Eruption / Tephra / Alluvium / Paleoearthquake / Calibrated age |
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| Research Abstract |
High-precision and high-reliability radiocarbon chronology is necessary to improve the resolution of environmental change, crustal movement, and human evolution. This radiocarbon chronology will present clear and precise space-time images of the Post Glacial period. In order to realize this chronology and to apply the result to more extensive area in different geological context, we introduced high-precision radio carbon dating associated with tephrochronology. An super-low-background liquid scintillation beta-ray counter was installed together with benzene synthesis vacuum line in Hiroshima University. Through careful examination of the procedure of benzene synthesis, of isotopic fractionation, and of the quality of standard samples, the new radiocarbon dating system has begun to date important samples of Post Glacial period. In the field, systematic method for dating sample collection and through examination and sample-event relationship were carried out for tephras, paleoearthquakes, and sea-level fluctuation.
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