Physical mechanism of major earthquakes by earthquake cases
文献类型：期刊论文
| 作者 | Wu Xiao-Wa; Qin Si-Qing; Xue Lei; Yang Bai-Cun; Li Pei; Zhang Ke |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2016-10-01 |
| 卷号 | 59期号:10页码:3696-3710 |
| 关键词 | Seismic zone Lock patch Major earthquake Physical mechanism Brittle failure |
| DOI | 10.6038/cjg20161016 |
| 文献子类 | Article |
| 英文摘要 | Understanding the physical mechanism of major earthquakes is very important for earthquake prediction and its disaster reduction. The mainstream hypotheses on earthquake mechanism are reviewed in this paper. It is pointed out that the elastic rebound and stick-slip hypotheses, both of which are usually used to explain the mechanism of shallow-focus earthquakes, have some serious drawbacks, and that such hypotheses explaining the mechanism of intermediate- and deep-focus earthquakes as the dehydration embrittlement, phase transition instability, shear melting and anticrack-associated faulting, are inconsistent with some observation data. Thus, it is necessary to establish a new hypothesis or theory on earthquake mechanism. The brittle failure theory of multiple locked patches in a seismogenic fault system developed by us since 2010, is introduced in the present study. It is stated by the theory that the progressive failures of locked patch result in the occurrence of earthquakes due to the fault movement. Hereafter, the significant earthquakes occurred at its volume expansion and peak strength points are referred to as characteristic ones. The earthquake cases indicate that the seismogenic processes of shallow-, intermediate- and deep-focus characteristic earthquakes can be well explained by the theory. We emphasize that both the elastic rebound and stick-slip hypotheses contain the same implicit assumption that there exist locked patches in the seismogenic faults, and that the source body of deep-focus earthquakes is with appropriate environment conditions leading to brittle failures. Moreover, some controversial issues, such as seismic stress drop much less than that of rock failure in the laboratory test, heat flow paradox and Self-Organized Criticality (SOC), are discussed and can be reasonably explained by the theory. The present study shows that the physical mechanism of major earthquakes is attributed to the brittle failures of locked patches. |
| WOS关键词 | DEEP EARTHQUAKES ; SUBDUCTING LITHOSPHERE ; HEAT-FLOW ; HIGH-PRESSURE ; PHASE-TRANSFORMATIONS ; ISOTROPIC COMPONENT ; THERMAL STRUCTURE ; TRANSITION ZONE ; UPPER-MANTLE ; STICK-SLIP |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000388654300016 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/53216]  |
| 专题 | 地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室 |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu Xiao-Wa,Qin Si-Qing,Xue Lei,et al. Physical mechanism of major earthquakes by earthquake cases[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2016,59(10):3696-3710. |
| APA | Wu Xiao-Wa,Qin Si-Qing,Xue Lei,Yang Bai-Cun,Li Pei,&Zhang Ke.(2016).Physical mechanism of major earthquakes by earthquake cases.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,59(10),3696-3710. |
| MLA | Wu Xiao-Wa,et al."Physical mechanism of major earthquakes by earthquake cases".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 59.10(2016):3696-3710. |
入库方式： OAI收割
来源：地质与地球物理研究所
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