气候变化领域集成服务门户(CCPortal): Direct Evidence for Fluid Pressure; Dilatancy; and Compaction Affecting Slip in Isolated Faults

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DOI	10.1029/2019GL086767
	Direct Evidence for Fluid Pressure; Dilatancy; and Compaction Affecting Slip in Isolated Faults
	Proctor B.; Lockner D.A.; Kilgore B.D.; Mitchell T.M.; Beeler N.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	Earthquake instability occurs as a result of strength loss during sliding on a fault. It has been known for over 50 years that fault compaction or dilatancy may cause significant weakening or strengthening by dramatically changing the fluid pressure trapped in faults. Despite this fundamental importance, we have no real understanding of the exact conditions that lead to compaction or dilation during nucleation or rupture. To date, no direct measurements of pore pressure changes during slip in hydraulically isolated faults have been reported. We show direct examples of fluid pressure variations during nucleation and rupture using a miniature pressure transducer embedded in an experimental fault. We demonstrate that fluids not only are significant in controlling fault behavior but can provide the dominant mechanism controlling fault stability. The effect of fluid pressure changes can exceed frictional variations predicted by rate- and state-dependent friction laws, exerting fundamental controls on earthquake rupture initiation. ©2020. The Authors.
英文关键词	Compaction; Crystallization; Earthquakes; Friction; Nucleation; Direct measurement; Dominant mechanism; Earthquake instability; Earthquake rupture; Fluid pressures; Fundamental control; Pressure change; State-dependent; Faulting; compaction; dilatancy; earthquake event; earthquake rupture; fault slip; fluid pressure; nucleation; pore pressure; sliding
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169899
作者单位	Naval Surface Warfare Center, Crane, IN, United States; U. S. Geological Survey, Menlo Park, CA, United States; Department of Earth Sciences, University College London, London, United Kingdom
推荐引用方式 GB/T 7714	Proctor B.,Lockner D.A.,Kilgore B.D.,et al. Direct Evidence for Fluid Pressure; Dilatancy; and Compaction Affecting Slip in Isolated Faults[J],2020,47(16).
APA	Proctor B.,Lockner D.A.,Kilgore B.D.,Mitchell T.M.,&Beeler N.M..(2020).Direct Evidence for Fluid Pressure; Dilatancy; and Compaction Affecting Slip in Isolated Faults.Geophysical Research Letters,47(16).
MLA	Proctor B.,et al."Direct Evidence for Fluid Pressure; Dilatancy; and Compaction Affecting Slip in Isolated Faults".Geophysical Research Letters 47.16(2020).