DOI: 10.1016/j.quascirev.2017.05.015
Scopus记录号: 2-s2.0-85019770293
论文题名: Were they all giants? Perspectives on late Holocene plate-boundary earthquakes at the northern end of the Cascadia subduction zone
作者: Hutchinson I. ; Clague J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 169 起始页码: 29
结束页码: 49
语种: 英语
英文关键词: Cascadia
; Holocene
; North America
; Paleoseismology
; Radioogenic isotopes
; Tsunamis
; Vancouver Island
Scopus关键词: Deposits
; Geophysics
; Soils
; Tsunamis
; Cascadia
; Holocenes
; North America
; Paleoseismology
; Vancouver Island
; Earthquakes
; coseismic process
; earthquake
; earthquake magnitude
; earthquake rupture
; Holocene
; paleoseismicity
; plate boundary
; stable isotope
; subduction zone
; temporal record
; Cascadia Margin
; North America
; Pacific Ocean
英文摘要: The relative magnitude of plate-boundary earthquakes at the northern end of the Cascadia subduction zone was assessed from the temporal concordance between the ages of coseismically buried late Holocene soils in southwest Washington, their counterparts in central and southern Cascadia, offshore turbidites, and paleoseismic deposits on the west coast of Vancouver Island. Only three of the seven buried soils in southwest Washington that can be reliably traced as buried soils or paleotsunami deposits in the coastal lowlands of south-central and southern Cascadia have well-dated counterparts in northern Cascadia. The three wide-ranging events date from Cascadia earthquakes Y (∼250 cal BP), U (∼1260 cal BP), and N (∼2520 cal BP). All three likely ruptured the entire plate margin, and therefore potentially qualify as “giants” (Mw ≥ 9). Deposits that may derive from tsunamis generated by earthquakes S (∼1570 cal BP), L (∼2870 cal BP) and J (∼3360 cal BP) can also be found in northern Cascadia, but the ages of these deposits are not yet well-enough constrained to determine whether they are coeval with their southern counterparts. Earthquake W (∼850 cal BP), appears to be present in the northern Cascadia paleoseismic record, but yields considerably older ages than in central Cascadia, and may be missing from southernmost Cascadia. The onshore record of an offshore turbidite (T2) displays a similar spatio-temporal pattern to that of earthquake W. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59183
Appears in Collections: 过去全球变化的重建
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作者单位: Vancouver, BC, Canada; Department of Earth Sciences, Simon Fraser University, Burnaby, BC, Canada
Recommended Citation:
Hutchinson I.,Clague J.. Were they all giants? Perspectives on late Holocene plate-boundary earthquakes at the northern end of the Cascadia subduction zone[J]. Quaternary Science Reviews,2017-01-01,169