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Seismotectonics of the 2017-2018 Songyuan Earthquake Sequence, Northeastern China: Passive Bookshelf Faulting and Block Rotation in the Songliao Basin
Su, Zhe1; Xu, Xi-Wei1; Liang, Shan-Shan2; Wang, Erchie3
2020-05-01
Source PublicationSEISMOLOGICAL RESEARCH LETTERS
ISSN0895-0695
Volume91Issue:3Pages:1593-1605
AbstractThe high frequency of earthquake clusters generated by pure strike-slip faulting over the past 3 yr (beginning in 2017 in the Songliao basin, northeastern China) has motivated us to consider why lateral strike slip and not extension determines the seismic activity within the Songliao basin. Precise location and characterization of relocated aftershocks, forward modeling of the coseismic displacement field, and Global Positioning System (GPS) monitoring data are combined to detect the possible seismogenic structures of the Songyuan earthquake sequence. The 2017 M-L 5.3 aftershock cluster coincided with the northeast-striking Fuyu-Zhaodong fault (FZF), and the 2018 aftershock swarm followed the linear trend (N42 degrees W) of the Songhuajiang fault (SHF). In addition, the forward modeling results indicate that during the earthquakes, right-lateral and left-lateral strike-slip displacements occurred simultaneously along the FZF and SHF, respectively. These two strike-slip faults joined to accommodate the intervening crustal blocks' asymmetrical east-west convergence and a single northward extrusion. We also utilize 5 yr of GPS data to construct the regional strain-rate map for the basin. The measurements show that right-lateral transform motion along the immense northeast-striking right-lateral strike-slip faults, for example, the Tanlu fault zone and the FZF, impose a northeast-striking simple shear across the Songliao basin. This simple shear not only caused left-lateral movement on the minor northwest-striking left-lateral strike-slip faults such as the SHF but also rotated them similar to 14 degrees clockwise into their present orientations. The results of the proposed bookshelf faulting model in which the predominant northeast-striking parallel faults are initiated are consistent with the observed lineament orientations, focal mechanisms, and earthquake distributions. The sharp shift in the subduction direction of the Pacific plate seems to have had a considerable influence on the intracontinental deformation in China, at least throughout northeastern China.
DOI10.1785/0220190251
Funding OrganizationNational Key Research and Development Program of the Ministry of science and technology (MOST) ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2
WOS Keyword7.8 TANGSHAN EARTHQUAKE ; NORTH CHINA ; YILAN-YITONG ; EXTENSIONAL TECTONICS ; CRUSTAL STRUCTURE ; TIBETAN PLATEAU ; EASTERN CHINA ; SOURCE REGION ; JAPAN SEA ; NE CHINA
Language英语
Funding ProjectNational Key Research and Development Program of the Ministry of science and technology (MOST)[2018YFZ1504104] ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund[ZDJ2017-24] ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2[3194]
Funding OrganizationNational Key Research and Development Program of the Ministry of science and technology (MOST) ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; National Key Research and Development Program of the Ministry of science and technology (MOST) ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; Institute of Crustal Dynamics and China Earthquake Administration Research Fund ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2 ; JAXA's 6th Research Announcement for the Advanced Land Observing Satellite2
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000530707300027
PublisherSEISMOLOGICAL SOC AMER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/96725
Collection岩石圈演化国家重点实验室
Corresponding AuthorSu, Zhe
Affiliation1.China Earthquake Adm, Key Lab Crustal Dynam, Inst Crustal Dynam, Beijing, Peoples R China
2.China Earthquake Networks Ctr, Dept Seism Networks, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Su, Zhe,Xu, Xi-Wei,Liang, Shan-Shan,et al. Seismotectonics of the 2017-2018 Songyuan Earthquake Sequence, Northeastern China: Passive Bookshelf Faulting and Block Rotation in the Songliao Basin[J]. SEISMOLOGICAL RESEARCH LETTERS,2020,91(3):1593-1605.
APA Su, Zhe,Xu, Xi-Wei,Liang, Shan-Shan,&Wang, Erchie.(2020).Seismotectonics of the 2017-2018 Songyuan Earthquake Sequence, Northeastern China: Passive Bookshelf Faulting and Block Rotation in the Songliao Basin.SEISMOLOGICAL RESEARCH LETTERS,91(3),1593-1605.
MLA Su, Zhe,et al."Seismotectonics of the 2017-2018 Songyuan Earthquake Sequence, Northeastern China: Passive Bookshelf Faulting and Block Rotation in the Songliao Basin".SEISMOLOGICAL RESEARCH LETTERS 91.3(2020):1593-1605.
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