中文版 | English
Title

Two slip regimes in sheared granular fault

Author
Corresponding AuthorGao,Ke
Publication Years
2023-04-15
DOI
Source Title
ISSN
0012-821X
EISSN
1385-013X
Volume608
Abstract
In the stick-slip cycles of faults, the evolving contact state inside the gouge is a major contribution to the evolution of fault friction. However, the microscopic contact changes within stick-slip cycles associated with the possible existence of multiple fault slip regimes are still obscure. By simulating a sheared fault containing a granular gouge, we examine the particle-level contact evolution inside the gouge and the corresponding gouge stress field heterogeneity at fault slip. We find two regimes of fault slip driven by the heterogeneity of the gouge stress field: in the case of weak gouge stress field heterogeneity, local contact rearrangements give rise to macroscopic friction coefficient drop and accumulated gouge stress field heterogeneity (dispersive regime); in the instance of strong stress field heterogeneity, catastrophic failure occurs via contact rearrangement sweeping the whole fault and homogenizes the stress field distribution in the gouge (pervasive regime). In the language of self-organized criticality, the accumulation of gouge stress field heterogeneity is an inevitable consequence of increased entropy in the preparation stage of a large earthquake, which eventually destroys the long-range stress field correlations in the gouge and resets at the beginning of a new cycle of a large earthquake.
Keywords
URL[Source Record]
Indexed By
Language
English
Important Publications
NI Journal Papers
SUSTech Authorship
First ; Corresponding
Funding Project
National Key R&D Program of China[2022YFF0800601] ; National Natural Science Fund for Major Programs of China[42090054] ; National Natu- ral Science Fund for Excellent Young Scholars of China[41922055]
WOS Research Area
Geochemistry & Geophysics
WOS Subject
Geochemistry & Geophysics
WOS Accession No
WOS:000961945100001
Publisher
ESI Research Field
GEOSCIENCES
Scopus EID
2-s2.0-85149438771
Data Source
Scopus
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/513372
DepartmentDepartment of Earth and Space Sciences
Affiliation
1.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.Faculty of Engineering,China University of Geosciences,Wuhan,Hubei,430074,China
3.Badong National Observation and Research Station of Geohazards,China University of Geosciences,Wuhan,430074,China
First Author AffilicationDepartment of Earth and Space Sciences
Corresponding Author AffilicationDepartment of Earth and Space Sciences
First Author's First AffilicationDepartment of Earth and Space Sciences
Recommended Citation
GB/T 7714
Zhang,Yahui,Gao,Ke,Li,Changdong. Two slip regimes in sheared granular fault[J]. EARTH AND PLANETARY SCIENCE LETTERS,2023,608.
APA
Zhang,Yahui,Gao,Ke,&Li,Changdong.(2023).Two slip regimes in sheared granular fault.EARTH AND PLANETARY SCIENCE LETTERS,608.
MLA
Zhang,Yahui,et al."Two slip regimes in sheared granular fault".EARTH AND PLANETARY SCIENCE LETTERS 608(2023).
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