A ∼ 3000 years-old sequence of extreme events revealed by marine and shore deposits east of Taiwan

NCU Institutional Repository > 地球科學學院 > 地球科學學系 > 期刊論文 > Item 987654321/103219

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://ir.lib.ncu.edu.tw/handle/987654321/103219

题名:	A ∼ 3000 years-old sequence of extreme events revealed by marine and shore deposits east of Taiwan
作者:	許樹坤;Lallemand, Serge;Lehu, Rémi;Rétif, Fabien;Hsu, Shu-Kun;Babonneau, Nathalie;Ratzov, Gueorgui;Bassetti, Maria-Angela;Dezileau, Laurent;Hsieh, Meng-Long;Dominguez, Stéphane
贡献者:	地球科學學院地球科學學系
关键词:	Coasts;Debris flow;Detritus;Earthquakes;Fragments;Gravitation;Kuroshio Current;Landslides;Landslides & mudslides;Modelling;Mollusks;Ocean circulation;Radiocarbon dating;Radiometric dating;Rivers;Sedimentation & deposition;Seismic activity;Sequencing;Shellfish;Shells;Submarines;Transport;Tsunamis;Typhoons;Wood
日期:	2016-12-05
上传时间:	2026-04-23 11:26:00 (UTC+8)
出版者:	Elsevier;Amsterdam: Elsevier BV
摘要:	摘要： We have discovered in a marine core, located 20 km east of the Coastal Range of Taiwan at the top of a 1200 m deep submarine high, sheltered from rivers discharges and gravitational flows, a 23 cm-thick anomalous sequence topped with broken bivalves and wood fragments. Based on radiocarbon dating, we distinguish five sub-events within ~ 100 yrs, about 3000 years ago. The oldest four sub-events are interpreted as the record of local submarine landslides, likely triggered by clustered earthquakes that are common in this tectonically active area. The last event including shells and wood has a different origin. Despite the high level of climatic and tectonic recent activity, no comparable event has been observed at the same site since that time, making it unique during the last 3.75 ka. Hydrodynamical modeling stimulated with a set of submarine landslide-triggered tsunami sources and combined with the regional oceanic circulation dominated by the Kuroshio Current, allow us to better constrain the transport paths of the suspended material, the expected run-up at the coast, and ultimately the trigger and source that best fit our observations. The Kuroshio Current appears as a strong constraint that generally prevents cross-shore transport of suspended material even during a major tsunami. Since the largest aerial debris flow observed along the east coast of Taiwan during the last 4 ka was synchronous with the marine deposit, our preferred scenario starts with the occurrence of four distinct large earthquakes within less than a century, triggering both submarine and aerial landslides in the study area. Then, a giant typhoon reworked the nearshore material as well as the slided material stored upstream resulting in a debris flow. It deeply modified the surface current, allowing the wood debris and shells to fastly reach the core site. 出版者： Amsterdam: Elsevier BV 出版日期： 2016-12-05 出處： Tectonophysics, 2016-12, Vol.692, p.325-341 資源來源： Elsevier ScienceDirect Journals Complete 版權： Copyright Elsevier BV Dec 5, 2016 識別號： ISSN: 0040-1951 識別號： EISSN: 1879-3266 識別號： DOI: 10.1016/j.tecto.2015.11.001
显示于类别:	[地球科學學系] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	30	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....