Origin of pulverized rocks during earthquake fault rupture

doi:10.1029/2010JB007721

IMECH-IR > 非线性力学国家重点实验室

	Origin of pulverized rocks during earthquake fault rupture
	Yuan FP(袁福平); Prakash V; Tullis T; Yuan, FP (reprint author), Case Western Reserve Univ, Dept Mech & Aerosp Engn, 10900 Euclid Ave, Cleveland, OH 44106 USA
发表期刊	Journal of Geophysical Research-Solid Earth
	2011
卷号	116 页码:B06309
ISSN	2169-9313
摘要	The origin of pulverized rocks (PR) in surface outcrops adjacent to the fault cores of the San Andreas and other major faults in Southern California is not clear, but their structural context indicates that they are clearly associated with faulting. An understanding of their origin might allow inferences to be drawn about the nature of dynamic slip on faults, including rupture mechanisms and their speed during earthquakes. In the present study, we use split Hopkinson bar recovery experiments to investigate whether PR can be produced under dynamic stress wave loading conditions in the laboratory and whether PR is diagnostic of any particular process of formation. The results of the study indicate that in Westerly granite for transition from sparse fracture to pervasive pulverization requires high strain rates in excess of 250/s and that the formation of PR may be inhibited at the larger burial depths. The constraint imposed by field observations of the relatively low strains (1-3%) in PR recovered from the field and the laboratory derived threshold for the critical strain rate (similar to 250/s and higher) together indicate that a dynamic supershear-type rupture may be necessary for the origin of pulverized rocks at distances of tens of meters away from the fault plane as observed in the field for both large strike-slip-type and the relatively small dip-slip-type fault ruptures in nature.
关键词	Hopkinson Pressure Bar High-strain-rate San-andreas Fault Southern California Brittle Materials Westerly Granite Dynamic Rupture Tensile Crack Loading Rate Compression
学科领域	Geochemistry & Geophysics
DOI	10.1029/2010JB007721
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000292145400001
关键词[WOS]	HOPKINSON PRESSURE BAR ; HIGH-STRAIN-RATE ; SAN-ANDREAS FAULT ; SOUTHERN CALIFORNIA ; BRITTLE MATERIALS ; WESTERLY GRANITE ; DYNAMIC RUPTURE ; TENSILE CRACK ; LOADING RATE ; COMPRESSION
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
项目资助者	The authors would like to acknowledge the National Science Foundation Earth Division (EAR: 0710975 and EAR: 0810083) for providing financial support for conducting the present research. The authors from CWRU would also like to acknowledge the National Science Foundation for the Major Research Instrumentation awards MRI CMMI 0079458 and MRI CMMI 0521364 that were used to acquire the ultra-high-speed digital camera (DRS Hadland 200) and the SEM (FEI FE NanoSEM600) that were used to conduct the experiments reported in the manuscript.
课题组名称	LNM材料介观力学性能的表征
论文分区	一类
引用统计	被引频次：87[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/44922
专题	非线性力学国家重点实验室
通讯作者	Yuan, FP (reprint author), Case Western Reserve Univ, Dept Mech & Aerosp Engn, 10900 Euclid Ave, Cleveland, OH 44106 USA
推荐引用方式 GB/T 7714	Yuan FP,Prakash V,Tullis T,et al. Origin of pulverized rocks during earthquake fault rupture[J]. Journal of Geophysical Research-Solid Earth,2011,116:B06309.
APA	袁福平,Prakash V,Tullis T,&Yuan, FP .(2011).Origin of pulverized rocks during earthquake fault rupture.Journal of Geophysical Research-Solid Earth,116,B06309.
MLA	袁福平,et al."Origin of pulverized rocks during earthquake fault rupture".Journal of Geophysical Research-Solid Earth 116(2011):B06309.

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