DOI: 10.1002/2015GL067056
论文题名: Dynamically triggered slip leading to sustained fault gouge weakening under laboratory shear conditions
作者: Johnson P.A. ; Carmeliet J. ; Savage H.M. ; Scuderi M. ; Carpenter B.M. ; Guyer R.A. ; Daub E.G. ; Marone C.
刊名: Geophysical Research Letters
ISSN: 0094-9367
EISSN: 1944-9098
出版年: 2016
卷: 43, 期: 4 起始页码: 1559
结束页码: 1565
语种: 英语
英文关键词: dynamic earthquake triggering
; fault recovery
; laboratory studies of triggering
Scopus关键词: Recovery
; Shear stress
; Critical shear stress
; Dynamic condition
; Dynamic earthquake triggering
; Fault recovery
; Laboratory studies
; Material strength
; Recovery process
; Steady-state condition
; Shear flow
; biaxial test
; dynamic property
; earthquake trigger
; fault gouge
; laboratory method
; recovery
; slip
; softening
; steady-state equilibrium
; trigger mechanism
英文摘要: We investigate dynamic wave-triggered slip under laboratory shear conditions. The experiment is composed of a three-block system containing two gouge layers composed of glass beads and held in place by a fixed load in a biaxial configuration. When the system is sheared under steady state conditions at a normal load of 4 MPa, we find that shear failure may be instantaneously triggered by a dynamic wave, corresponding to material weakening and softening if the system is in a critical shear stress state (near failure). Following triggering, the gouge material remains in a perturbed state over multiple slip cycles as evidenced by the recovery of the material strength, shear modulus, and slip recurrence time. This work suggests that faults must be critically stressed to trigger under dynamic conditions and that the recovery process following a dynamically triggered event differs from the recovery following a spontaneous event. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977853383&doi=10.1002%2f2015GL067056&partnerID=40&md5=d4e2f6a26be8a1c0177a07a95efa9729
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10330
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: Los Alamos National Laboratory, Geophysics Group, Los Alamos, NM, United States
Recommended Citation:
Johnson P.A.,Carmeliet J.,Savage H.M.,et al. Dynamically triggered slip leading to sustained fault gouge weakening under laboratory shear conditions[J]. Geophysical Research Letters,2016-01-01,43(4).