Magnetotelluric imaging and deep seismogenic environment in Dongchuan-Xundian segment of Xiaojiang fault zone
文献类型：期刊论文
| 作者 | Cui TengFa4; Chen XiaoBin3; Li WenJun4; Li WenQiao4; Li Xin2; Xie XingBing1; Zhou Lei1 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 66期号:10页码:4224-4240 |
| 关键词 | Xiaojiang fault zone Magnetotelluric imaging Seismogenic environment 3D electrical resistivity structure Dongchuan Xundian segment |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg2022Q0640 |
| 英文摘要 | The Xiaojiang fault zone is one of the boundary faults where the material of the Tibet Plateau escapes in the southeast direction and has strong seismicity. The Dongchuan-Xundian segment has experienced three strong earthquakes with a magnitude greater than 6. 5. The deep electrical resistivity structure of the Dongchuan-Xundian segment can provide important information for the study of the deep seismogenic environment of the three historical strong earthquakes. Magnetotelluric imaging results show that the lower crust of the study area has a significant high-conductivity structure, which may contain a high melt fraction and has a low strength/viscosity. Xiaojiang fault zone in 10 km depth is an obvious structural boundary, which is conducive to the shear deformation of the fault zone. Strong earthquakes occurred in the fault zones may be mainly limited by high-resistivity structures in the upper crust. In the upper crust, the east branch of the Xiaojiang fault zone turns southward along with the high-resistivity structure in Tianba, and the high-resistivity bodies on both sides of the East branch fault in Gongshan area are close to each other. Together, they hinder the sinistral strike-slip of the east branch fault and the propagation of the seismic rupture. The west branch of Xiaojiang fault zone is the boundary between three high-resistivity bodies in the upper crust north of Songming. The contact of rigid high-resistivity bodies may lead to the presence of local structures blocking the strike-slip of the fault and provides necessary structural conditions for strong earthquakes. |
| WOS关键词 | ELECTRICAL-RESISTIVITY STRUCTURE ; ALTYN TAGH FAULT ; ACTIVE TECTONICS ; EASTERN BOUNDARY ; TIBETAN PLATEAU ; CRUSTAL ; SICHUAN ; YUNNAN ; DEFORMATION ; EARTHQUAKE |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001086914800015 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110710]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Cui TengFa |
| 作者单位 | 1.Yangtze Univ, Wuhan 430100, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Minist Emergency Management Peoples Republ China, Natl Inst Nat IIazards, Beijing 100085, Peoples R China 4.China Earthquake Adm, Inst Earthquake Forecasting, Beijing 100036, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cui TengFa,Chen XiaoBin,Li WenJun,et al. Magnetotelluric imaging and deep seismogenic environment in Dongchuan-Xundian segment of Xiaojiang fault zone[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2023,66(10):4224-4240. |
| APA | Cui TengFa.,Chen XiaoBin.,Li WenJun.,Li WenQiao.,Li Xin.,...&Zhou Lei.(2023).Magnetotelluric imaging and deep seismogenic environment in Dongchuan-Xundian segment of Xiaojiang fault zone.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,66(10),4224-4240. |
| MLA | Cui TengFa,et al."Magnetotelluric imaging and deep seismogenic environment in Dongchuan-Xundian segment of Xiaojiang fault zone".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 66.10(2023):4224-4240. |
入库方式： OAI收割
来源：地质与地球物理研究所
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