DOI: 10.1002/2015GL063180
论文题名: A numerical study of strike-slip bend formation with application to the Salton Sea pull-apart basin
作者: Ye J. ; Liu M. ; Wang H.
刊名: Geophysical Research Letters
ISSN: 0094-8890
EISSN: 1944-8621
出版年: 2015
卷: 42, 期: 5 起始页码: 1368
结束页码: 1374
语种: 英语
英文关键词: finite element model
; pull-apart basin
; Salton Sea
; stepovers
; strike-slip faults
Scopus关键词: Finite element method
; Plasticity
; Strike-slip faults
; Drucker-prager plasticity models
; Pull-apart
; Salton Sea
; San Andreas fault
; Southern California
; Step-overs
; Strain localizations
; Viscoelasto plastics
; Fault slips
; finite element method
; numerical model
; pull apart basin
; seismic zone
; shear stress
; strike-slip fault
; viscoelasticity
; California
; Salton Sea
; United States
英文摘要: How stepovers of strike-slip faults connect to form bends is a question important for understanding the formation of push-up ranges (restraining bends) and pull-apart basins (releasing bends). We investigated the basic mechanics of this process in a simple three-dimensional viscoelastoplastic finite element model. Our model predicts localized plastic strain within stepovers that may eventually lead to the formation of strike-slip bends. Major parameters controlling strain localization include the relative fault strength, geometry of the fault system, and the plasticity model assumed. Using the Drucker-Prager plasticity model, in which the plastic yield strength of the crust depends on both shear and normal stresses, our results show that a releasing bend is easier to develop than a restraining bend under similar conditions. These results may help explain the formation of the Salton Sea pull-apart basin in Southern California 0.5-0.1 Ma ago, when the stepover between the Imperial Fault and the San Andreas Fault was connected by the Brawley seismic zone. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925853633&doi=10.1002%2f2015GL063180&partnerID=40&md5=d63b2e21ce7755777451b5af44af939e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8506
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Geological Sciences, University of Missouri, Columbia, MO, United States
Recommended Citation:
Ye J.,Liu M.,Wang H.. A numerical study of strike-slip bend formation with application to the Salton Sea pull-apart basin[J]. Geophysical Research Letters,2015-01-01,42(5).