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Coseismic displacement of the 5 April 2017 Mashhad earthquake (Mw 6.1) in NE Iran through Sentinel-1A TOPS data: New implications for the strain partitioning in the southern Binalud Mountains
Su, Zhe1; Yang, Ying-Hui2; Li, Yong-Sheng1; Xu, Xi-Wei1; Zhang, Jingfa1; Zhou, Xin1; Ren, Jun-Jie1; Wang, Er-Chie3; Hu, Jyr-Ching4; Zhang, Shi-Min1; Talebian, Morteza5
2019
发表期刊JOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
卷号169页码:244-256
摘要The outward expansion of the northeastern Iranian Plateau is mainly accommodated by a series of widely distributed range-normal thrust and range-parallel strike-slip faults. However, the role of the strike-slip faults in this region's strain-partitioning kinematics remains unclear. The occurrence of the 5 April 2017 Mw 6.1 Mashhad earthquake provides us a rare opportunity to study this topic because this earthquake struck the southern Binalud Mountains, which are experiencing an oblique convergence between the northward-moving Lut Block and the NW-striking Binalud and Kopeh Dagh mountain ranges. We process two paired ascending and descending Sentinel-1A radar-image observations to determine the relative contributions from the dip and strike-dip subcomponents in such an oblique collisional domain. The interferograms along the line-of-sight direction and their converted horizontal and vertical displacements indicate that a thrust with a right-lateral strike-slip fault controlled the rupture process of the Mashhad earthquake, with the maximum dextral shearing and vertical displacements reaching 19.5 cm and 14 cm, respectively. Coseismic surface deformation measurements are also used to estimate the fault geometry and invert the slip distribution along the underlying seismogenic fault. Our best-fit faulting model suggests that the coseismic rupture occurred on a fault plane with a dip angle of 37.5 degrees and strike angle of 324 degrees. The strike-slip subcomponent was more significant than the dip-slip, approaching similar to 95 cm, and the dip-slip varied from 10 cm to 47 cm. The seismic-moment release of our preferred fault model is 1.71 x 10(18) Nm, equivalent to a Mw 6.16 earthquake event. We also use the preferred fault model to calculate the Coulomb failure stress (CFS) change at the nearby receiver faults. Combined with an analysis of historical earthquakes and the consistent dextral river deflections along the strike-slip fault systems of the southern Binalud and Kopeh Dagh Mountains, we speculate that the seismogenic structure that triggered the Mashhad earthquake should have been one strand fault of the NW-SE-striking Kashafrud fault system. The strike-slip faults in NE Iran play an important role in accommodating the lateral transport of crustal material from the convergence front of the Lut Block and Binalud fragments and providing commonly distributed anticlockwise rotation around a vertical axis.
关键词NE Iran 2017 Mashhad Mw 6.1 earthquake Descending and ascending Sentinel-1A TOPS radar images Lateral extrusion Conjugate strike-slip faults
DOI10.1016/j.jseaes.2018.08.010
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; Institute of Crustal Dynamics, China Earthquake Administration ; Institute of Crustal Dynamics, China Earthquake Administration ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Institute of Crustal Dynamics, China Earthquake Administration ; Institute of Crustal Dynamics, China Earthquake Administration ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Institute of Crustal Dynamics, China Earthquake Administration ; Institute of Crustal Dynamics, China Earthquake Administration ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Institute of Crustal Dynamics, China Earthquake Administration ; Institute of Crustal Dynamics, China Earthquake Administration ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2)
关键词[WOS]PRESENT-DAY KINEMATICS ; KOPEH DAGH MOUNTAINS ; GPS MEASUREMENTS ; SLIP RATES ; DEFORMATION ; FAULT ; ACCOMMODATION ; CONVERGENCE ; RELOCATION ; TECTONICS
语种英语
资助项目National Natural Science Foundation of China[41502219] ; National Natural Science Foundation of China[41704051] ; National Natural Science Foundation of China[91214201] ; National Natural Science Foundation of China[40821160550] ; Institute of Crustal Dynamics, China Earthquake Administration[ZDJ2017-15] ; Institute of Crustal Dynamics, China Earthquake Administration[ZDJ2017-29] ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2)[P3194002]
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; Institute of Crustal Dynamics, China Earthquake Administration ; Institute of Crustal Dynamics, China Earthquake Administration ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Institute of Crustal Dynamics, China Earthquake Administration ; Institute of Crustal Dynamics, China Earthquake Administration ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Institute of Crustal Dynamics, China Earthquake Administration ; Institute of Crustal Dynamics, China Earthquake Administration ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Institute of Crustal Dynamics, China Earthquake Administration ; Institute of Crustal Dynamics, China Earthquake Administration ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2) ; JAXA under the 6th Research Announcement Program for the Advanced Land Observing Satellite-2 (ALOS-2)
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000453619400018
出版者PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/90305
专题岩石圈演化国家重点实验室
通讯作者Su, Zhe
作者单位1.China Earthquake Adm, Inst Crustal Dynam, Key Lab Crustal Dynam, Beijing, Peoples R China
2.Southwest Petr Univ, Sch Civil Engn & Architecture, Chengdu, Sichuan, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Natl Taiwan Univ, Dept Geosci, Geodesy & Remote Sensing Lab, Taipei, Taiwan
5.Geol Survey Iran, Res Inst Earth Sci, Tehran, Iran
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Su, Zhe,Yang, Ying-Hui,Li, Yong-Sheng,et al. Coseismic displacement of the 5 April 2017 Mashhad earthquake (Mw 6.1) in NE Iran through Sentinel-1A TOPS data: New implications for the strain partitioning in the southern Binalud Mountains[J]. JOURNAL OF ASIAN EARTH SCIENCES,2019,169:244-256.
APA Su, Zhe.,Yang, Ying-Hui.,Li, Yong-Sheng.,Xu, Xi-Wei.,Zhang, Jingfa.,...&Talebian, Morteza.(2019).Coseismic displacement of the 5 April 2017 Mashhad earthquake (Mw 6.1) in NE Iran through Sentinel-1A TOPS data: New implications for the strain partitioning in the southern Binalud Mountains.JOURNAL OF ASIAN EARTH SCIENCES,169,244-256.
MLA Su, Zhe,et al."Coseismic displacement of the 5 April 2017 Mashhad earthquake (Mw 6.1) in NE Iran through Sentinel-1A TOPS data: New implications for the strain partitioning in the southern Binalud Mountains".JOURNAL OF ASIAN EARTH SCIENCES 169(2019):244-256.
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