Radiocarbon dating of coastal boulders from Kouzushima and Miyake islands off Tokyo Metropolitan Area, Japan: Implications for coastal hazard risk
Radiocarbon dating of coastal boulders from Kouzushima and Miyake islands off Tokyo Metropolitan Area, Japan: Implications for coastal hazard risk
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日本东京都市区附近神津岛和三宅岛沿海巨石的放射性碳测年：对沿海灾害风险的影响
DOI：
10.1016/j.quaint.2017.05.040
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发表时间：
2017
影响因子：
2.2
通讯作者：
Iryu Yasufumi
中科院分区：
文献类型：
--
作者：
Kitamura Akihisa;Imai Takafumi;Miyairi Yosuke;Yokoyama Yusuke;Iryu Yasufumi
在过去的二十年里，两次巨大的海啸（2004年苏门答腊-安达曼地震和2011年东北地震）和2013年超级台风海燕引发的大风暴潮对西太平洋许多地区的基础设施，财产和工业造成了灾难性的破坏。为了提高日本西南部太平洋沿岸的灾害评估水平，需要对全新世晚期的海啸和风暴潮进行历史重建。本研究通过调查海岸巨石，确定东京都近海的新岛、志根岛、口津岛和三宅岛是否曾遭受过海啸和风暴潮的影响。在Kouzushima和Miyakejima的海岸巨石上发现了海洋生物。这些生物的放射性碳年代测定表明，这些巨石分别在公元1694年-现代和现代期间就位。高津岛的巨石（13.3吨，海拔1.4米）是由历史上的海啸或严重的风暴潮搬运而来的，而三宅岛的巨石（33.4吨，海拔7.1米）可能是由1979年7920号台风引起的风暴潮搬运而来的。在三宅岛（海拔2.31-3.06米）发现一个海栖生物组合，其年代约为1800年。距今3900-3500年。这种高相对海平面可以解释为中全新世高水位和与火山活动有关的隆起。
Over the last two decades, two giant tsunamis generated by earthquakes of approximately Mw 9 (the 2004 Sumatra–Andaman and 2011 Tohoku earthquakes), and a large storm surge associated with the 2013 Super Typhoon Haiyan, have caused catastrophic damage to infrastructure, property, and industry in many areas of the western Pacific. If we are to improve coastal hazard assessment for the Pacific coast of the southwestern Japanese mainland, a reconstruction of the history of tsunamis and storm surges during the late Holocene is required.This study surveyed coastal boulders to determine whether such events have previously affected the islands of Niijima, Shikinejima, Kouzushima, and Miyakejima that lie offshore from the Tokyo Metropolitan Area. Coastal boulders on Kouzushima and Miyakejima were found with marine organisms attached. Radiocarbon dating of these organisms indicates that the boulders were emplaced during the periods AD 1694–Modern and Modern, respectively. The boulder on Kouzushima (13.3 ton at 1.4 m ground elevation) was transported by historical tsunamis or severe storm surges, whereas the boulder on Miyakejima (33.4 ton at 7.1 m ground elevation) was probably transported by a storm surge associated with Typhoon 7920 in 1979. An emerged marine sessile assemblage on Miyakejima (2.31–3.06 m above mean sea-level (amsl)) was dated to ca. 3900–3500 years BP. This high relative sea-level can be explained by a mid-Holocene highstand and uplift associated with volcanic activity.
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确定日本静冈平原上可能存在的海啸沉积物及其与过去 4000 年地震活动的相关性
DOI：
10.1177/0959683613505345
发表时间：
2013
期刊：
The Holocene
影响因子：
--
作者：
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影响因子：
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影响因子：
3.5
作者：
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通讯作者：
S. Nakada;M. Nagai;T. Kaneko;A. Nozawa;K. Suzuki-kamata
日本中部骏河海槽附近伊达低地的沙层揭示了中世纪沿海洪水
影响因子：
3.7
作者：
Y. Sawai;K. Tanigawa;T. Tamura;Y. Namegaya
通讯作者：
Y. Namegaya
日本中部静冈县下田海岸发现海啸巨石
DOI：
10.4116/jaqua.53.259
发表时间：
2014
期刊：
The Quaternary Research (daiyonki-kenkyu)
影响因子：
--
作者：
A. Kitamura;Y. Ohashi;Y. Miyairi;Y. Yokoyama;Toshiyuki Yamaguchi
通讯作者：
Toshiyuki Yamaguchi