干旱区生态环境知识资源中心(Arid): The Shear Deformation Zone and the Smoothing of Faults With Displacement

Arid

DOI	10.1029/2020JB020447
	The Shear Deformation Zone and the Smoothing of Faults With Displacement
	Perrin, Clement; Waldhauser, Felix; Scholz, Christopher H.
通讯作者	Perrin, C (corresponding author), Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA. ; Perrin, C (corresponding author), Univ Nantes, Lab Planetol & Geodynam, Observ Sci Univers Nantes Atlantique, UMR6112,UMS3281,CNRS,Univ Angers, Nantes, France.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
ISSN	2169-9313
EISSN	2169-9356
出版年	2021
卷号	126 期号:5
英文摘要	We use high-resolution earthquake locations to characterize the three-dimensional structure of active faults in California and how it evolves with fault structural maturity. We investigate the distribution of aftershocks of several recent large earthquakes that occurred on continental strike slip faults of various structural maturity (i.e. various cumulative fault displacement, length, initiation age and slip rate). Aftershocks define a tabular zone of shear deformation surrounding the mainshock rupture plane. Comparing this to geological observations, we conclude that this results from the re-activation of secondary faults. We observe a rapid fall off of the number of aftershocks at a distance range of 0.06-0.22 km from the main fault surface of mature faults, and 0.6-1.0 km from the fault surface of immature faults. The total width of the active shear deformation zone surrounding the main fault plane reaches 1.0-2.5 km and 6-9 km for mature and immature faults, respectively. We find that the width of the shear deformation zone decreases as a power law with cumulative fault displacement. Comparing with a dynamic rough fault model, we infer that the narrowing of the shear deformation zone agrees quantitatively with earlier estimates of the smoothing of faults with displacement, both of which are aspects of fault wear. We find that earthquake stress drop decreases with fault displacement and hence with increased smoothness and/or slip rate. This may result from fault healing or the effect of roughness on friction.
英文关键词	aftershock distributions fault maturity large earthquakes shear deformation zone scaling laws
类型	Article
语种	英语
开放获取类型	Green Submitted, Green Published
收录类别	SCI-E
WOS记录号	WOS:000654526100011
WOS关键词	SAN-ANDREAS FAULT ; STRIKE-SLIP FAULTS ; EARTHQUAKE STRESS DROP ; 7.1 HECTOR MINE ; MOJAVE-DESERT ; STRUCTURAL MATURITY ; RECURRENCE INTERVAL ; DEPENDENT FRICTION ; CENTRAL CALIFORNIA ; RUPTURE PROCESS
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350848
作者单位	[Perrin, Clement; Waldhauser, Felix; Scholz, Christopher H.] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA; [Perrin, Clement] Univ Nantes, Lab Planetol & Geodynam, Observ Sci Univers Nantes Atlantique, UMR6112,UMS3281,CNRS,Univ Angers, Nantes, France
推荐引用方式 GB/T 7714	Perrin, Clement,Waldhauser, Felix,Scholz, Christopher H.. The Shear Deformation Zone and the Smoothing of Faults With Displacement[J],2021,126(5).
APA	Perrin, Clement,Waldhauser, Felix,&Scholz, Christopher H..(2021).The Shear Deformation Zone and the Smoothing of Faults With Displacement.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(5).
MLA	Perrin, Clement,et al."The Shear Deformation Zone and the Smoothing of Faults With Displacement".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.5(2021).