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  4. 岩石圈演化国家重点实验室
Magnetotelluric evidence of fluid-related seismicity beneath the Chuxiong Basin, SE Tibetan Plateau

文献类型：期刊论文

作者Li, Dewei2; Yu, Nian1; Li, Xin3,4; Wang, Enci1; Li, Ruiheng1; Wang, Xuben2
刊名TECTONOPHYSICS
出版日期2021-10-05
卷号816页码:12
关键词Magnetotelluric Fluids Earthquake Chuxiong Basin Tibetan Plateau
ISSN号0040-1951
DOI10.1016/j.tecto.2021.229039
英文摘要Fluids play an important role in intracontinental seismicity and have become an important issue in solid earth sciences. In this study, we present evidence of fluid-related seismicity on the southeastern Tibetan Plateau. A sequence of large earthquakes (Ms > 6.0) occurred in the Dayao and Yao'an areas within the Chuxiong Basin from 2000 to 2009, where no obvious traces of active faults at the surface indicate the source fault of these earthquakes. To reveal the deep earthquake structure and the mechanism of these earthquakes, we carried out two magnetotelluric (MT) profiles that intersected in the epicentral region. The three-dimensional (3-D) inversion method was used to provide a more realistic electrical resistivity model since phase tensor analysis showed 3-D features. The electrical structures along the two profiles showed similar characteristics: lower crustal conductors underlie the upper crustal resistive zone, the resistive zone may correspond to a crystalline basement, and the lower crustal conductors were interpreted as aqueous fluid-related and water-derived partial melting. Earthquakes were distributed mainly in the upper crustal resistive zone but not in the underlying conductive zones, which indicated that fluid migration into the upper crust may have contributed to triggering earthquakes in this area.
WOS关键词SHIZUOKA TECTONIC LINE ; ORE-FORMING FLUID ; ELECTRICAL-CONDUCTIVITY ; CRUSTAL STRUCTURE ; DENSITY STRUCTURE ; YUNNAN PROVINCE ; AQUEOUS FLUIDS ; SOUTHERN TIBET ; EASTERN MARGIN ; COPPER-DEPOSIT
资助项目National Natural Science Foundation of China[91755215] ; National Natural Science Foundation of China[41874087] ; National Natural Science Foundation of China[42074081]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000695182600023
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/102634]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Yu, Nian; Li, Xin
作者单位1.Chongqing Univ, Sch Elect Engn, Chongqing, Peoples R China
2.Chengdu Univ Technol, Key Lab Earth Explorat & Informat Tech, Chengdu, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
4.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Li, Dewei,Yu, Nian,Li, Xin,et al. Magnetotelluric evidence of fluid-related seismicity beneath the Chuxiong Basin, SE Tibetan Plateau[J]. TECTONOPHYSICS,2021,816:12.
APA Li, Dewei,Yu, Nian,Li, Xin,Wang, Enci,Li, Ruiheng,&Wang, Xuben.(2021).Magnetotelluric evidence of fluid-related seismicity beneath the Chuxiong Basin, SE Tibetan Plateau.TECTONOPHYSICS,816,12.
MLA Li, Dewei,et al."Magnetotelluric evidence of fluid-related seismicity beneath the Chuxiong Basin, SE Tibetan Plateau".TECTONOPHYSICS 816(2021):12.

入库方式： OAI收割

来源：地质与地球物理研究所

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