globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.02.018
Scopus记录号: 2-s2.0-85013943168
论文题名:
Coastal lake sediments reveal 5500 years of tsunami history in south central Chile
作者: Kempf P.; Moernaut J.; Van Daele M.; Vandoorne W.; Pino M.; Urrutia R.; De Batist M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 161
起始页码: 99
结束页码: 116
语种: 英语
英文关键词: Age-depth modelling ; Chile ; Holocene ; Lagoons & swamps ; Lakes ; Natural hazards ; Sea level changes ; Sedimentology ; South America ; Tsunami
Scopus关键词: Deposits ; Earthquakes ; Geophysics ; Lakes ; Sea level ; Sedimentology ; Tectonics ; Wetlands ; Chile ; Holocenes ; Natural hazard ; Sealevel change ; South America ; Tsunamis ; coastal lagoon ; coastal zone ; core analysis ; depositional environment ; earthquake event ; earthquake rupture ; earthquake trigger ; history of geography ; Holocene ; lacustrine deposit ; natural hazard ; sea level change ; sedimentology ; swamp ; tsunami ; Chile ; Chiloe Island ; Los Lagos ; South America ; Chilo
英文摘要: We present an exceptionally long and continuous coastal lacustrine record of ∼5500 years from Lake Huelde on the west coast of Chiloé Island in south central Chile. The study area is located within the rupture zone of the giant 1960 CE Great Chilean Earthquake (MW 9.5). The subsequent earthquake-induced tsunami inundated Lake Huelde and deposited mud rip-up clasts, massive sand and a mud cap in the lake. Long sediment cores from 8 core sites within Lake Huelde reveal 16 additional sandy layers in the 5500 year long record. The sandy layers share sedimentological similarities with the deposit of the 1960 CE tsunami and other coastal lake tsunami deposits elsewhere. On the basis of general and site-specific criteria we interpret the sandy layers as tsunami deposits. Age-control is provided by four different methods, 1) 210Pb-dating, 2) the identification of the 137Cs-peak, 3) an infrared stimulated luminescence (IRSL) date and 4) 22 radiocarbon dates. The ages of each tsunami deposit are modelled using the Bayesian statistic tools of OxCal and Bacon. The record from Lake Huelde matches the 8 regionally known tsunami deposits from documented history and geological evidence from the last ∼2000 years without over- or underrepresentation. We extend the existing tsunami history by 9 tsunami deposits. We discuss the advantages and disadvantages of various sedimentary environments for tsunami deposition and preservation, e.g. we find that Lake Huelde is 2–3 times less sensitive to relative sea-level change in comparison to coastal marshes in the same region. © 2017 Elsevier Ltd
资助项目: PK acknowledges financial support by the Special Research Fund of Ghent University (BOF), JM from the Chilean Fondecyt projects no. 1150346 and 1150321 and from the Swiss National Science Foundation (SNF) grant 133481, MVD from the Research Foundation Flanders (FWO travel grant K201512N). We thank Koen De Rycker and Dr. Gauvain Wiemer for fieldwork support, Dr. Claire Schepens and Dr. Eric Achten for CT-scanner support, Dr. Maarten Blaauw for advice on the age-depth model Bacon, and Dr. Marco Cisternas for constructive criticism on an earlier version of the manuscript. Dr. Witold Szczuciński and an anonymous reviewer are thanked for their constructive criticism.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59283
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作者单位: Renard Centre of Marine Geology, Ghent University, Ghent, Belgium; Institute of Geology, University of Innsbruck, Innsbruck, Austria; Institute of Earth Sciences, Universidad Austral de Chile, Valdivia, Chile; Centro EULA, Universidad de Concepcion, Concepcion, Chile; Centro CRHIAM, Universidad de Concepción, Concepción, Chile

Recommended Citation:
Kempf P.,Moernaut J.,Van Daele M.,et al. Coastal lake sediments reveal 5500 years of tsunami history in south central Chile[J]. Quaternary Science Reviews,2017-01-01,161
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