globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2015.01.006
Scopus记录号: 2-s2.0-84939455056
论文题名:
Beach ridges as paleoseismic indicators of abrupt coastal subsidence during subduction zone earthquakes, and implications for Alaska-Aleutian subduction zone paleoseismology, southeast coast of the Kenai Peninsula, Alaska
作者: Kelsey H.M.; Witter R.C.; Engelhart S.E.; Briggs R.; Nelson A.; Haeussler P.; Corbett D.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 113
起始页码: 147
结束页码: 158
语种: 英语
英文关键词: Alaska-Aleutian subduction zone ; Beach ridges ; Kenai peninsula ; Paleoseismology ; Subduction zone ; Subduction zone earthquakes ; Subduction zone segments
Scopus关键词: Beaches ; Coastal engineering ; Earthquakes ; Seismology ; Subsidence ; Wetlands ; Beach ridge ; Kenai peninsula ; Paleoseismology ; Subduction zones ; Subduction-zone earthquakes ; Geophysics ; beach ridge ; burial (geology) ; coastal wetland ; coseismic process ; creep ; erosion ; historical record ; paleoseismicity ; paleosol ; rupture ; slip ; slip rate ; subduction zone ; subsidence ; wetland ; Alaska ; Aleutian Margin ; Kenai Peninsula ; Pacific Ocean ; United States
英文摘要: The Kenai section of the eastern Alaska-Aleutian subduction zone straddles two areas of high slip in the 1964 great Alaska earthquake and is the least studied of the three megathrust segments (Kodiak, Kenai, Prince William Sound) that ruptured in 1964. Investigation of two coastal sites in the eastern part of the Kenai segment, on the southeast coast of the Kenai Peninsula, identified evidence for two subduction zone earthquakes that predate the 1964 earthquake. Both coastal sites provide paleoseismic data through inferred coseismic subsidence of wetlands and associated subsidence-induced erosion of beach ridges. At Verdant Cove, paleo-beach ridges record the paleoseismic history; whereas at Quicksand Cove, buried soils in drowned coastal wetlands are the primary indicators of paleoearthquake occurrence and age. The timing of submergence and death of trees mark the oldest earthquake at Verdant Cove that is consistent with the age of a well documented ~900-year-ago subduction zone earthquake that ruptured the Prince William Sound segment of the megathrust to the east and the Kodiak segment to the west. Soils buried within the last 400-450 years mark the penultimate earthquake on the southeast coast of the Kenai Peninsula. The penultimate earthquake probably occurred before AD 1840 from its absence in Russian historical accounts. The penultimate subduction zone earthquake on the Kenai segment did not rupture in conjunction with the Prince William Sound to the northeast. Therefore the Kenai segment, which is presently creeping, can rupture independently of the adjacent Prince William Sound segment that is presently locked. © 2015 Elsevier Ltd.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59983
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: Department of Geology, Humboldt State University, Arcata, CA, United States; U. S. Geological Survey, Alaska Science Center, 4210 University Drive, Anchorage, AK, United States; Department of Geosciences, University of Rhode Island, 9 E. Alumni Ave., Kingston, RI, United States; Geologic Hazards Team, US Geological Survey, Golden, CO, United States; Department of Geological Sciences, East Carolina University, Greenville, NC, United States

Recommended Citation:
Kelsey H.M.,Witter R.C.,Engelhart S.E.,et al. Beach ridges as paleoseismic indicators of abrupt coastal subsidence during subduction zone earthquakes, and implications for Alaska-Aleutian subduction zone paleoseismology, southeast coast of the Kenai Peninsula, Alaska[J]. Quaternary Science Reviews,2015-01-01,113
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Kelsey H.M.]'s Articles
[Witter R.C.]'s Articles
[Engelhart S.E.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Kelsey H.M.]'s Articles
[Witter R.C.]'s Articles
[Engelhart S.E.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Kelsey H.M.]‘s Articles
[Witter R.C.]‘s Articles
[Engelhart S.E.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.