The Origin of Seismic and Tectonic Activity Underlying the Sichuan Basin, Central China
文献类型：期刊论文
| 作者 | Su, Zhe2,3,4; Buergmann, Roland3; Wang, Erchie1 |
| 刊名 | TECTONICS
 |
| 出版日期 | 2023-05-01 |
| 卷号 | 42期号:5页码:20 |
| 关键词 | seismic activity of the Sichuan basin (China) bookshelf rotation strike-slip faulting the 2008 Wenchuan Mw 7 9 earthquake crystalline basement |
| ISSN号 | 0278-7407 |
| DOI | 10.1029/2022TC007629 |
| 英文摘要 | The Sichuan basin, located adjacent to the eastern margin of the Tibetan Plateau, serves as an ideal marker for testing the extrusion process of the plateau. The basin is seismically active, with the strongest earthquake, the 2008 Mw 7.9 Wenchuan earthquake, occurring in the Longmen Shan range along its northwestern edge. A new regional compilation of focal mechanism solutions of earthquakes in and surrounding the basin reveals that a large fraction of the events have focal depths ranging between 8 and 25 km, corresponding to the crystalline basement of the basin. Seismic deformation involves right-lateral oblique reverse faults, mostly trending northeast-southwest, similar to the kinematics of the mainshock of the Wenchuan earthquake. Shallow earthquakes (3-8 km) suggest that some of the seismic faults rupturing the crystalline basement are growing toward the surface. To the southwest, the seismicity transitions to activity along the left-lateral Xianshuihe-Xiaojiang fault zone. The spatial relationship between these two sets of fault zones is consistent with a model in which the Sichuan basin responds to the southeast extrusion of the Chuan-Dian block at the southeast margin of the plateau by a counterclockwise bookshelf rotation of the crystalline basement. This deformation pattern initiated similar to 4-2 Ma, as shown by the age of the Xiaojiang fault segment. The history of left-lateral movement along the Xianshuihe-Xiaojiang fault can be traced back to similar to 12 Ma when the eastward growth of the Tibetan Plateau resulted in the shortening of both the Longmen Shan thrust belt and the sedimentary over the Sichuan basin. |
| WOS关键词 | EASTERN TIBETAN PLATEAU ; RED-RIVER FAULT ; XIANSHUIHE FAULT ; LONGMEN SHAN ; WENCHUAN EARTHQUAKE ; VELOCITY STRUCTURE ; WEST SICHUAN ; SLIP-RATE ; DEFORMATION ; MARGIN |
| 资助项目 | National Natural Science Foundation of China[U2139201] ; National Natural Science Foundation of China[41972207] ; National Natural Science Foundation of China[41772220] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001000279600001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 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 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110977]  |
| 专题 | 地质与地球物理研究所_离退休科研人员 |
| 通讯作者 | Su, Zhe |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China 2.Minist Emergency Management China, Key Lab Cpd & Chained Nat Hazards Dynam, Beijing, Peoples R China 3.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA USA 4.Natl Inst Nat Hazards, Minist Emergency Management China, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, Zhe,Buergmann, Roland,Wang, Erchie. The Origin of Seismic and Tectonic Activity Underlying the Sichuan Basin, Central China[J]. TECTONICS,2023,42(5):20. |
| APA | Su, Zhe,Buergmann, Roland,&Wang, Erchie.(2023).The Origin of Seismic and Tectonic Activity Underlying the Sichuan Basin, Central China.TECTONICS,42(5),20. |
| MLA | Su, Zhe,et al."The Origin of Seismic and Tectonic Activity Underlying the Sichuan Basin, Central China".TECTONICS 42.5(2023):20. |
入库方式： OAI收割
来源：地质与地球物理研究所
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