Three-dimensional crustal Vp and Vs structures beneath the southern segment of the Tan-Lu fault revealed by active source and earthquake data
文献类型:期刊论文
作者 | Zhang, Yunpeng2; Wang, Baoshan1,2,3; Xu, Tao4,5; Yang, Wei2; Wang, Weitao2; Xu, Yihe2; Li, Lu2 |
刊名 | GEOPHYSICAL JOURNAL INTERNATIONAL
![]() |
出版日期 | 2020-12-01 |
卷号 | 223期号:3页码:2148-2165 |
关键词 | Body waves Airgun source Seismic tomography Crustal structure |
ISSN号 | 0956-540X |
DOI | 10.1093/gji/ggaa314 |
英文摘要 | The 2400-km-long Tan-Lu fault, the largest deformation zone in eastern China, plays a decisive role in the seismicity, regional tectonics and mineral deposits distributions. However, the velocity structure beneath the Tan-Lu fault, particularly in the southern segment, is poorly imaged due to the lack of local earthquakes. To obtain a high-resolution crustal structure image, we carried out an active source experiment by firing mobile airgun sources along the Yangtze River in the Anhui Province in October 2015. We manually picked 4118 P wave and 1906 S wave first arrival times from the airgun signals. We also collected 28 957 P wave and 26 257 S wave first arrival times from local earthquakes in a larger area. 3-D crustal velocity images beneath the southern segment of the Tan-Lu fault and surrounding areas are studied using traveltime tomography. Compared with the local earthquake data, the active source data provide better constraints on the upper crustal structure, which further refines the resolution of the lower-crust structure. The Vp and Vs crustal structures are consistent with the local geological settings, and earthquakes are primarily clustered near faults and are spatially correlated with low-velocity zones. Strong velocity contrasts are observed across the Tan-Lu fault zone, which is the main factor controlling local anomalies. The high Vp, Vs and Vp/Vs beneath the Qinling-Dabie orogenic belt and the Middle-Lower Yangtze River Metallogenic Belt may relate to Mesozoic lithospheric delamination and asthenospheric upwelling. These results also demonstrate that the mobile large-volume airgun sources are promising tools for 3-D crustal structure surveys. |
WOS关键词 | LOWER YANGTZE-RIVER ; SOURCE SEISMIC EXPERIMENT ; WAVE VELOCITY STRUCTURE ; TANCHENG-LUJIANG FAULT ; METALLOGENIC BELT ; TOMOGRAPHY BENEATH ; CONTINENTAL-CRUST ; SURROUNDING AREAS ; DEEP-STRUCTURE ; OROGENIC BELT |
资助项目 | National Natural Science Foundation of China[41674061] ; National Natural Science Foundation of China[41674058] ; National Natural Science Foundation of China[41790462] ; National Natural Science Foundation of China[41790464] ; Institute of Geophysics, China Earthquake Administration[DQJB17T04] |
WOS研究方向 | Geochemistry & Geophysics |
语种 | 英语 |
WOS记录号 | WOS:000605982100045 |
出版者 | OXFORD UNIV PRESS |
资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Institute of Geophysics, China Earthquake Administration ; Institute of Geophysics, China Earthquake Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Institute of Geophysics, China Earthquake Administration ; Institute of Geophysics, China Earthquake Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Institute of Geophysics, China Earthquake Administration ; Institute of Geophysics, China Earthquake Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Institute of Geophysics, China Earthquake Administration ; Institute of Geophysics, China Earthquake Administration |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/100001] ![]() |
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 | Wang, Baoshan |
作者单位 | 1.Univ Sci & Technol China, Mengcheng Natl Geophys Observ, Hefei 230026, Peoples R China 2.China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China 3.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China 4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100029, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Yunpeng,Wang, Baoshan,Xu, Tao,et al. Three-dimensional crustal Vp and Vs structures beneath the southern segment of the Tan-Lu fault revealed by active source and earthquake data[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2020,223(3):2148-2165. |
APA | Zhang, Yunpeng.,Wang, Baoshan.,Xu, Tao.,Yang, Wei.,Wang, Weitao.,...&Li, Lu.(2020).Three-dimensional crustal Vp and Vs structures beneath the southern segment of the Tan-Lu fault revealed by active source and earthquake data.GEOPHYSICAL JOURNAL INTERNATIONAL,223(3),2148-2165. |
MLA | Zhang, Yunpeng,et al."Three-dimensional crustal Vp and Vs structures beneath the southern segment of the Tan-Lu fault revealed by active source and earthquake data".GEOPHYSICAL JOURNAL INTERNATIONAL 223.3(2020):2148-2165. |
入库方式: OAI收割
来源:地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。