Stress Shadow on the Southwest Portion of the Longmen Shan Fault Impacted the 2008 Wenchuan Earthquake Rupture
文献类型：期刊论文
| 作者 | Liu, Chang1; Dong, Peiyu2; Zhu BJ(朱伯靖)3 ; Shi, Yaolin4
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
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| 出版日期 | 2018-11-01 |
| 卷号 | 123期号:11页码:9963-9981 |
| 关键词 | The 2008 Wenchuan earthquake stress shadow unilateral propagation fault interaction the Xianshui He fault the Longmen Shan fault |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2018JB015633 |
| 产权排序 | 第3完成单位 |
| 通讯作者 | Liu, Chang(changliuu@tongji.edu.cn) |
| 文献子类 | Article |
| 英文摘要 | The 2008 Wenchuan earthquake (Mw7.9) unilaterally ruptured the Longmen Shan fault (LMSF) along eastern Tibet. The earthquake rupture propagated about 270km northeastward, whereas it propagated only about 20km southwestward along the strike of the fault. Although a significant attention has been paid to the question of predominantly unilateral propagation, the primary reasons for this type of propagation remain unclear. In this research, we examined the change of Coulomb stress along the LMSF caused by the historical earthquakes near and on the LMSF from 1725 to 2008. We found that the 14 preceding large earthquakes (M6.5) on the Xianshui He fault cast a stress shadow on the SW segment of the LMSF, which was not activated by the 2008 Wenchuan earthquake rupture. The 1970 Dayi earthquake on the SW segment of the LMSF contributed significantly to this stress shadow. Compared with the segment of the 2008 Wenchuan earthquake rupture, this stress shadow caused strong stress contrasts of -214, -22, and -80kPa in the seismic gap of the very SW segment of the LMSF, the rupture zone of the 2013 Lushan earthquake, and the seismic gap between the 2008 Wenchuan and 2013 Lushan earthquake ruptures, respectively. Stress contrasts in these values were consistent with tectonic loading over 165, 17, and 62years, respectively, by integrating an interseismic stress-loading rate of 1.3kPa/a. We proposed that this stress shadow might have created a barrier at the SW segment, preventing the earthquake rupture propagating southwestward. |
| 学科主题 | 地球科学 |
| URL标识 | 查看原文 |
| 出版地 | 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA |
| WOS关键词 | W 6.6 LUSHAN ; TIBETAN PLATEAU ; EASTERN MARGIN ; XIANSHUIHE FAULT ; TECTONIC IMPLICATIONS ; VELOCITY STRUCTURE ; ACTIVE TECTONICS ; WESTERN SICHUAN ; CRUSTAL FLOW ; EVOLUTION |
| 资助项目 | National Key R&D Program of China[2017YFC0602001] ; Fundamental Research Funds for the Central Universities[22120180260] ; National Natural Science Foundation of China[41404075] ; National Natural Science Foundation of China[41704101] ; National Natural Science Foundation of China[41704098] ; National Natural Science Foundation of China[41590865] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000454775200051 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Key R&D Program of China[2017YFC0602001] ; Fundamental Research Funds for the Central Universities[22120180260] ; National Natural Science Foundation of China[41404075, 41704101, 41704098, 41590865] |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/18250]  |
| 专题 | 云南天文台_太阳物理研究组 |
| 通讯作者 | Liu, Chang |
| 作者单位 | 1.State Key Laboratory of Marine Geology, Tongji University, Shanghai, China 2.Institute of Seismology, China Earthquake Administration, and Hubei Earthquake Administration, Wuhan, China 3.Yunnan observatories, Chinese Academy of Sciences, Kunming, China 4.Key Laboratory of Computational Geodynamics, Chinese Academy of Sciences, Beijing, China |
| 推荐引用方式 GB/T 7714 | Liu, Chang,Dong, Peiyu,Zhu BJ,et al. Stress Shadow on the Southwest Portion of the Longmen Shan Fault Impacted the 2008 Wenchuan Earthquake Rupture[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2018,123(11):9963-9981. |
| APA | Liu, Chang,Dong, Peiyu,Zhu BJ,&Shi, Yaolin.(2018).Stress Shadow on the Southwest Portion of the Longmen Shan Fault Impacted the 2008 Wenchuan Earthquake Rupture.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,123(11),9963-9981. |
| MLA | Liu, Chang,et al."Stress Shadow on the Southwest Portion of the Longmen Shan Fault Impacted the 2008 Wenchuan Earthquake Rupture".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 123.11(2018):9963-9981. |
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来源：云南天文台
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