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DOI | 10.1002/2017GL072538 |
On factors controlling precursor slip fronts in the laboratory and their relation to slow slip events in nature | |
Selvadurai, Paul A.; Glaser, Steven D.; Parker, Jessica M. | |
2017-03-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Spatial variations in frictional properties on natural faults are believed to be a factor influencing the presence of slow slip events (SSEs). This effect was tested on a laboratory frictional interface between two polymethyl methacrylate (PMMA) bodies. We studied the evolution of slip and slip rates that varied systematically based on the application of both high and low normal stress (sigma(0)=0.8 or 0.4MPa) and the far-field loading rate (V-LP). A spontaneous, frictional rupture expanded from the central, weaker, and more compliant section of the fault that had fewer asperities. Slow rupture propagated at speeds V-slow approximate to 0.8 to 26mms(-1) with slip rates from 0.01 to 0.2ms(-1), resulting in stress drops around 100kPa. During certain nucleation sequences, the fault experienced a partial stress drop, referred to as precursor detachment fronts in tribology. Only at the higher level of normal stress did these fronts exist, and the slip and slip rates mimicked the moment and moment release rates during the 2013-2014 Boso SSE in Japan. The laboratory detachment fronts showed rupture propagation speeds V-slow/V-R (5 to 172)x10(-7) and stress drops approximate to 100kPa, which both scaled to the aforementioned SSE. Distributions of asperities, measured using a pressure sensitive film, increased in complexity with additional normal stressan increase in normal stress caused added complexity by increasing both the mean size and standard deviation of asperity distributions, and this appeared to control the presence of the detachment front. |
英文关键词 | slow slip evolution precursory detachment fronts laboratory friction studies asperity formations slow slip events (SSEs) |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399762700016 |
WOS关键词 | NON-VOLCANIC TREMOR ; SUBDUCTION ZONE ; FRICTIONAL SLIP ; FREQUENCY EARTHQUAKES ; SOUTHWEST JAPAN ; STATIC FRICTION ; SILENT SLIP ; STICK-SLIP ; ONSET ; RUPTURE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27214 |
专题 | 气候变化 |
作者单位 | Univ Calif Berkeley, Civil & Environm Engn, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Selvadurai, Paul A.,Glaser, Steven D.,Parker, Jessica M.. On factors controlling precursor slip fronts in the laboratory and their relation to slow slip events in nature[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(6). |
APA | Selvadurai, Paul A.,Glaser, Steven D.,&Parker, Jessica M..(2017).On factors controlling precursor slip fronts in the laboratory and their relation to slow slip events in nature.GEOPHYSICAL RESEARCH LETTERS,44(6). |
MLA | Selvadurai, Paul A.,et al."On factors controlling precursor slip fronts in the laboratory and their relation to slow slip events in nature".GEOPHYSICAL RESEARCH LETTERS 44.6(2017). |
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