DOI: 10.1002/2013GL058671
论文题名: Probing the slip-weakening mechanism of earthquakes with electrical conductivity: Rapid transition from asperity contact to gouge comminution
作者: Yamashita F. ; Fukuyama E. ; Mizoguchi K.
刊名: Geophysical Research Letters
ISSN: 0094-10490
EISSN: 1944-10221
出版年: 2014
卷: 41, 期: 2 起始页码: 341
结束页码: 347
语种: 英语
英文关键词: electrical conductivity
; faulting
; friction
; gouge
; slip weakening
Scopus关键词: Earthquakes
; Electric conductivity
; Faulting
; Friction
; Grinding (comminution)
; Asperity contacts
; Conductivity data
; Electrical conductivity
; Frictional melting
; gouge
; Gouge comminutions
; Natural earthquake
; Slip weakening
; Fault slips
; asperity
; comminution
; earthquake event
; electrical conductivity
; fault
; micromechanics
; slip rate
英文摘要: Despite the great importance of slip weakening during earthquakes, the fault-weakening mechanism inside the fault remains to be clarified. Here we propose a micromechanism of slip weakening at seismic and subseismic slip rates as demonstrated by electrical conductivity observation across the fault. At the seismic slip rate, the formation of melt patches and the subsequent growth to molten layer during frictional melting were confirmed by the rapid increases in conductivity in two stages. At the subseismic slip rate, the conductivity data successfully captured rapid asperity breakage phases and the subsequent gouge evolution phases during the slip-weakening process. The present results suggest that the gouge comminution process is one of the key mechanisms controlling the slip stability at the subseismic slip rate, which may cause a variety of natural earthquakes. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892653231&doi=10.1002%2f2013GL058671&partnerID=40&md5=4ae37aef60b7055b3692f75c03a32de9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7754
Appears in Collections: 气候减缓与适应
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作者单位: National Research Institute for Earth Science and Disaster Prevention, Tsukuba, Japan
Recommended Citation:
Yamashita F.,Fukuyama E.,Mizoguchi K.. Probing the slip-weakening mechanism of earthquakes with electrical conductivity: Rapid transition from asperity contact to gouge comminution[J]. Geophysical Research Letters,2014-01-01,41(2).