Determination of the crustal structure and seismicity of the Linfen rift with S-wave velocity mapping

作     者：Zigen Wei Risheng Chu Meiqin Song Xiaolin Yang Shanshan Wu Feng Bao Zigen WEI;Risheng CHU;Meiqin SONG;Xiaolin YANG;Shanshan WU;Feng BAO

作者机构：State Key Laboratory of Geodesy and Earth’s DynamicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan430077China Earthquake Administration of Shanxi ProvinceTaiyuan030021China Shaanxi Earthquake AgencyXi’an710068China Shanghai Earthquake AgencyShanghai200062China 

出 版 物：《Frontiers of Earth Science》 (地球科学前沿（英文版）)

年 卷 期：2020年第14卷第3期

页      面：647-659页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0704[理学-天文学] 

基　　金：We also thank editors and two anonymous reviewers for their constructive reviews.This work is supported by the DREAM Project of the National Key R&D Program of China(No.2016YFC0600402) the National Natural Science Foundation of China(Grant No.41604056) 

主　　题：Linfen rift joint inversion S-wave velocity seismogenic layer deep crustal earthquake 

摘      要：The Linfen rift is a Cenozoic extensional rift with significant seismicity and seismic *** of this rift shed light on deep dynamic processes and seismogenic mechanisms relevant to crustal structure and seismic *** first conducted a joint inversion of receiver functions and surface wave dispersion on waveform data collected from 27 broadband seismic stations to image the crustal S-wave velocity in the Linfen rift and its *** then relocated the source parameters for 10 earthquake events with depths20 km and studied the relationship between crustal S-wave velocity and *** results show that low-velocity zones of different scales exist in the middle-lower crust,and that the depth of the seismogenic layer gradually increases from^25 km in the south to^34 km in the north,roughly corresponding to the bottom of the low-velocity *** found that most of the relocated earthquakes occurred in the low-velocity zone at depths of 18 km to 34 km,with the deepest at 32 *** of the greatest historic earthquakes,Linfen(Ms 7.75)in 1695 and Hongtong(Ms 8.0)in 1303,occurred at the bottom of the high-velocity zone at depths of 12 km to 18 *** results,combined with previous studies,suggest that the upwelling mantle material below the rift did not remarkably affect the velocity structure from the bottom of the seismogenic layer down to the uppermost mantle nor heat the *** is likely that neither crustal-scale faults nor mantle earthquakes exist in the Linfen rift.