气候变化领域集成服务门户(CCPortal): Fluid-induced aseismic fault slip outpaces pore-fluid migration

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DOI	10.1126/science.aaw7354
	Fluid-induced aseismic fault slip outpaces pore-fluid migration
	Bhattacharya P.; Viesca R.C.
发表日期	2019
ISSN	0036-8075
起始页码	464
结束页码	468
卷号	364 期号:6439
英文摘要	Earthquake swarms attributed to subsurface fluid injection are usually assumed to occur on faults destabilized by increased pore-fluid pressures. However, fluid injection could also activate aseismic slip, which might outpace pore-fluid migration and transmit earthquake-triggering stress changes beyond the fluid-pressurized region.We tested this theoretical prediction against data derived from fluid-injection experiments that activated and measured slow, aseismic slip on preexisting, shallow faults.We found that the pore pressure and slip history imply a fault whose strength is the product of a slip-weakening friction coefficient and the local effective normal stress. Using a coupled shear-rupture model, we derived constraints on the hydromechanical parameters of the actively deforming fault. The inferred aseismic rupture front propagates faster and to larger distances than the diffusion of pressurized pore fluid. © 2019 American Association for the Advancement of Science. All rights reserved.
英文关键词	dip-slip fault; earthquake event; fault slip; fluid injection; hydromechanics; porewater; prediction; pressure field; seismic method; Article; diffusion; fluid induced aseismic fault slip outpaces pore fluid migration; friction; physical phenomena; prediction; pressure; priority journal; stress
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243040
作者单位	Department of Civil and Environmental Engineering, Tufts University, Medford, MA 02155, United States; School of Earth, Ocean, and Climate Sciences, Indian Institute of Technology Bhubaneswar, Argul, Odisha, 752050, India
推荐引用方式 GB/T 7714	Bhattacharya P.,Viesca R.C.. Fluid-induced aseismic fault slip outpaces pore-fluid migration[J],2019,364(6439).
APA	Bhattacharya P.,&Viesca R.C..(2019).Fluid-induced aseismic fault slip outpaces pore-fluid migration.Science,364(6439).
MLA	Bhattacharya P.,et al."Fluid-induced aseismic fault slip outpaces pore-fluid migration".Science 364.6439(2019).