High-precision dating of significant geologic phenomena in Post-Glacial age

后冰河时代重要地质现象的高精度测年

• 批准号: 11308002
• 负责人: OKUMURA Koji
• 金额: $ 25.41万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11308002/
• 关键词: Radiocarbon dating; High-precision date; Post Glacial Age; Volcanic Eruption; Tephra; Alluvium; Paleoearthquake; Calibrated age

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.

高精度、高可靠性的放射性碳年代学对于提高环境变化、地壳运动和人类进化的分辨率是必要的。这份放射性碳年表将呈现后冰期时期清晰而精确的时空图像。为了实现这一年代学并将结果应用于不同地质背景下更广泛的区域，我们引入了与岩石年代学相关的高精度放射性碳测年技术。广岛大学与苯合成真空线一起安装了超低本底液体闪烁β射线计数器。通过对苯合成、同位素分馏和标准样品质量的仔细检查，新的放射性碳测年系统已开始对后冰期的重要样品进行测定。在现场，对火山灰、古地震、海平面波动等进行了系统的样品采集年代测定方法，并通过检验和样品与事件的关系。

项目成果

Koji Okumura: "Paleoseismology of the Itoigawa-Shizuoka tectonic line in central Japan"Journal of Seismology. 5. 411-431 (2001)

奥村浩二：“日本中部糸鱼川-静冈构造线的古地震学”地震学杂志。

Koji Okumura: "Paleoseismology of the Itoigawa-Shizuok tectonic line active fault system"Journal of Seismology. 5-2(in press). (2001)

奥村浩二：《糸鱼川-静冈构造线活动断层系的古地震学》地震学杂志。

町田 洋, 太田陽子, 河名俊男, 森脇 広, 長岡信治 編: "日本の地形 第7巻 九州西南諸島"東京大学出版会. 380 (2001)

Hiroshi Machida、Yoko Ota、Toshio Kawana、Hiroshi Moriwaki、Shinji Nagaoka（编）：“日本地形学第 7 卷九州西南群岛”东京大学出版社 380（2001 年）。

Kayanne, H., Yamano, H. and Randall, R. H.: "Holocene sea level changes and barrier reef formation on an oceanic island, Palau Islands, western Pacific"Sedimentary Geol. (in press).

Kayanne, H.、Yamano, H. 和 Randall, R. H.：“全新世海平面变化和西太平洋帕劳群岛大洋岛屿上的堡礁形成”沉积地质。

長岡信治, 奥野 充, 新井房夫: "10万〜3万年前の姶良カルデラ火山のテフラ層序と噴火史"地質学雑誌. 107. 432-450 (2001)

Shinji Nagaoka、Mitsuru Okuno、Fusao Arai：“Tephra 地层学和 100,000 至 30,000 年前的 Aira 破火山口火山喷发历史”地质杂志 107. 432-450 (2001)。