Origin of pulverized rocks during earthquake fault rupture
文献类型：期刊论文
| 作者 | Yuan FP(袁福平) ; Prakash V; Tullis T
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| 刊名 | Journal of Geophysical Research-Solid Earth
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| 出版日期 | 2011 |
| 卷号 | 116页码:B06309 |
| 通讯作者邮箱 | fpyuan@lnm.imech.ac.cn; vikas.prakash@case.edu; Terry_Tullis@brown.edu |
| 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 |
| ISSN号 | 2169-9313 |
| 产权排序 | [Yuan, Fuping; Prakash, Vikas] Case Western Reserve Univ, Dept Mech & Aerosp Engn, Cleveland, OH 44106 USA; [Yuan, Fuping] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China; [Tullis, Terry] Brown Univ, Dept Geol Sci, Providence, RI 02912 USA |
| 通讯作者 | Yuan, FP (reprint author), Case Western Reserve Univ, Dept Mech & Aerosp Engn, 10900 Euclid Ave, Cleveland, OH 44106 USA |
| 合作状况 | 国际 |
| 中文摘要 | 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. |
| 学科主题 | Geochemistry & Geophysics |
| 分类号 | 一类 |
| 类目[WOS] | Geochemistry & Geophysics |
| 研究领域[WOS] | Geochemistry & Geophysics |
| 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 |
| 收录类别 | SCI |
| 资助信息 | 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. |
| 原文出处 | http://dx.doi.org/10.1029/2010JB007721 |
| 语种 | 英语 |
| WOS记录号 | WOS:000292145400001 |
| 公开日期 | 2012-04-01 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/44922]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Yuan FP,Prakash V,Tullis T. 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.(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. |
入库方式： OAI收割
来源：力学研究所
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