干旱区生态环境知识资源中心(Arid): Stratigraphic evidence of two historical tsunamis on the semi-arid coast of north-central Chile

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DOI	10.1016/j.quascirev.2021.107052
	Stratigraphic evidence of two historical tsunamis on the semi-arid coast of north-central Chile
	DePaolis, Jessica M.; Dura, Tina; MacInnes, Breanyn; Ely, Lisa L.; Cisternas, Marco; Carvajal, Matias; Tang, Hui; Fritz, Hermann M.; Mizobe, Cyntia; Wesson, Robert L.; Figueroa, Gino; Brennan, Nicole; Horton, Benjamin P.; Pilarczyk, Jessica E.; Corbett, D. Reide; Gill, Benjamin C.; Weiss, Robert
通讯作者	DePaolis, JM (corresponding author), Virginia Polytech Inst & State Univ, Dept Geosci, Blacksburg, VA 24061 USA.
来源期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
EISSN	1873-457X
出版年	2021
卷号	266
英文摘要	On September 16, 2015, a Mw 8.3 earthquake struck the north-central Chile coast, triggering a tsunami observed along 500 km of coastline, between Huasco (28.5 degrees S) and San Antonio (33.5 degrees S). This tsunami provided a unique opportunity to examine the nature of tsunami deposits in a semi-arid, siliciclastic environment where stratigraphic and sedimentological records of past tsunamis are difficult to distinguish. To improve our ability to identify such evidence, we targeted one of the few low-energy, organicrich depositional environments in north-central Chile: Pachingo marsh in Tongoy Bay (30.3 degrees S). We found sedimentary evidence of the 2015 and one previous tsunami as tabular sand sheets. Both deposits are composed of poorly to moderately sorted, gray-brown, fine-to medium-grained sand and are distinct from underlying and overlying organic-rich silt. Both sand beds thin (from similar to 20 cm to <1 cm) and fine landward, and show normal grading. The older sand bed is thicker and extends over 125 m further inland than the 2015 tsunami deposit. To model the relative size of the tsunamis that deposited each sand bed, we employed tsunami flow inversion. Our results show that the older sand bed was produced by higher flow speeds and depths than those in 2015. Anthropogenic evidence along with Cs-137 and Pb-210 dating constrains the age of the older tsunami to the last similar to 110 years. We suggest that the older sand bed was deposited by the large tsunami in 1922 CE sourced to the north of our study site. This deposit represents the first geologic evidence of a pre-2015 tsunami along the semi-arid north-central Chile coast and highlights the current and continuing tsunami hazard in the region. (C) 2021 The Authors. Published by Elsevier Ltd.
英文关键词	North-central Chile Earthquakes Paleotsunamis Tsunami inundation Coastal hazards
类型	Article
语种	英语
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000694899400006
WOS关键词	RECONSTRUCTING PALEOSEISMIC DEFORMATION ; 2015 ILLAPEL ; EARTHQUAKE IMPLICATIONS ; GREAT EARTHQUAKES ; SEA-LEVEL ; DEPOSITS ; SUBDUCTION ; ATACAMA ; ESTUARY ; RECORDS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368526
作者单位	[DePaolis, Jessica M.; Dura, Tina; Gill, Benjamin C.; Weiss, Robert] Virginia Polytech Inst & State Univ, Dept Geosci, Blacksburg, VA 24061 USA; [Dura, Tina; Weiss, Robert] Virginia Polytech Inst & State Univ, Ctr Coastal Studies, Blacksburg, VA USA; [MacInnes, Breanyn; Ely, Lisa L.] Cent Washington Univ, Dept Geol Sci, Ellensburg, WA USA; [Cisternas, Marco; Carvajal, Matias; Mizobe, Cyntia; Figueroa, Gino] Pontificia Univ Catolica Valparaiso, Inst Geog, Valparaiso, Chile; [Tang, Hui] German Res Ctr Geosci, Potsdam, Germany; [Fritz, Hermann M.] Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA USA; [Wesson, Robert L.] US Geol Survey, Geol Hazards Sci Ctr, Box 25046, Denver, CO 80225 USA; [Brennan, Nicole] Univ Rhode Isl, Dept Geosci, Kingston, RI USA; [Horton, Benjamin P.] Nanyang Technol Univ, Asian Sch Environm, Singapore, Singapore; [Horton, Benjamin P.] Nanyang Technol Univ, Earth Observ Singapore, Singapore, Singapore; [Pilarczyk, Jessica E.] Simon Fraser Univ, Ctr Nat Hazards Res, Dept Ea...
推荐引用方式 GB/T 7714	DePaolis, Jessica M.,Dura, Tina,MacInnes, Breanyn,et al. Stratigraphic evidence of two historical tsunamis on the semi-arid coast of north-central Chile[J]. United States Geological Survey,2021,266.
APA	DePaolis, Jessica M..,Dura, Tina.,MacInnes, Breanyn.,Ely, Lisa L..,Cisternas, Marco.,...&Weiss, Robert.(2021).Stratigraphic evidence of two historical tsunamis on the semi-arid coast of north-central Chile.QUATERNARY SCIENCE REVIEWS,266.
MLA	DePaolis, Jessica M.,et al."Stratigraphic evidence of two historical tsunamis on the semi-arid coast of north-central Chile".QUATERNARY SCIENCE REVIEWS 266(2021).