| 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
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| Source Publication | Journal of Geophysical Research-Solid Earth
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| 2011 | |
| Volume | 116Pages:B06309 |
| ISSN | 2169-9313 |
| Abstract | 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. |
| Keyword | Hopkinson Pressure Bar High-strain-rate San-andreas Fault Southern California Brittle Materials Westerly Granite Dynamic Rupture Tensile Crack Loading Rate Compression |
| Subject Area | Geochemistry & Geophysics |
| DOI | 10.1029/2010JB007721 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000292145400001 |
| WOS Keyword | HOPKINSON PRESSURE BAR ; HIGH-STRAIN-RATE ; SAN-ANDREAS FAULT ; SOUTHERN CALIFORNIA ; BRITTLE MATERIALS ; WESTERLY GRANITE ; DYNAMIC RUPTURE ; TENSILE CRACK ; LOADING RATE ; COMPRESSION |
| WOS Research Area | Geochemistry & Geophysics |
| WOS Subject | Geochemistry & Geophysics |
| Funding Organization | 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. |
| Department | LNM材料介观力学性能的表征 |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/44922 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Yuan, FP (reprint author), Case Western Reserve Univ, Dept Mech & Aerosp Engn, 10900 Euclid Ave, Cleveland, OH 44106 USA |
| Recommended Citation 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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