DOI: 10.1016/j.quascirev.2013.04.007
Scopus记录号: 2-s2.0-84879549498
论文题名: Reconstructing paleoseismic deformation, 1: Modern analogues from the 1960 and 2010 Chilean great earthquakes
作者: Garrett E. ; Shennan I. ; Watcham E.P. ; Woodroffe S.A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 75 起始页码: 11
结束页码: 21
语种: 英语
英文关键词: 1960 Valdivia earthquake
; 2010 Maule earthquake
; Diatoms
; Earthquake reconstruction
; Tsunami
Scopus关键词: 1960 Valdivia earthquakes
; Assessment criteria
; Coseismic deformation
; Diatom assemblage
; Diatoms
; Sediment accumulation
; Subduction zones
; Transfer function model
; Deformation
; Lithology
; Sedimentology
; Stratigraphy
; Tsunamis
; Earthquakes
; biostratigraphy
; Chile earthquake 2010
; deformation mechanism
; geoaccumulation
; geochronology
; paleoseismicity
; plate boundary
; reconstruction
; sedimentation
; subduction zone
; tsunami
英文摘要: The 1960, and 2010 Chilean great earthquakes provide modern analogues for the sedimentary signatures of the largest megathrust events and their accompanying tsunamis. This paper presents lithological and diatom assemblage data from five sites and provides key insights for the development of longer earthquake chronologies, essential for assessing the seismic hazards associated with a subduction zone. We find that the 1960 and 2010 tsunami deposits are fragmentary, variable and have no unique, diagnostic diatom assemblage. Where rapid postseismic sedimentation occurs, our diatom-based transfer function model gives estimates of coseismic deformation that agree with independent estimates of land-level change. Sedimentary hiatuses at two sites following the 2010 earthquake suggest that the magnitude of coseismic deformation may be underestimated in fossil records. Where sediment accumulation allows, criteria for distinguishing between seismic and non-seismic stratigraphies based on evidence for the largest plate boundary earthquakes are corroborated by the lesser magnitude earthquake of 2010. The key to reconstructing earthquake characteristics, such as rupture magnitude and differences between plate-boundary and upper plate sources, depends on applying explicit stratigraphic assessment criteria at multiple sites in order to identify the spatial pattern of deformation associated with each earthquake. © 2013 [Author/Employing Institution]. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60555
Appears in Collections: 过去全球变化的重建
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作者单位: Durham University, Sea Level Research Unit, Department of Geography, South Road, Durham DH1 3LE, United Kingdom; Northumbria University, School of the Built and Natural Environment, Ellison Building, Newcastle-upon-Tyne NE1 8ST, United Kingdom
Recommended Citation:
Garrett E.,Shennan I.,Watcham E.P.,et al. Reconstructing paleoseismic deformation, 1: Modern analogues from the 1960 and 2010 Chilean great earthquakes[J]. Quaternary Science Reviews,2013-01-01,75