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[1]LI Zhe,ZHENG Yong.Double-difference Imaging of Crustal Velocity Structure in the Northern Shanxi Rift Valley and Its Seismogenic Tectonic Analysis[J].Journal of Seismological Research,2022,45(04):509-516.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0055]

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Double-difference Imaging of Crustal Velocity Structure in the Northern Shanxi Rift Valley and Its Seismogenic Tectonic Analysis

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 45 Number of periods: 2022 04 Page number: 509-516 Column: Public date: 2022-08-20

Title:: Double-difference Imaging of Crustal Velocity Structure in the Northern Shanxi Rift Valley and Its Seismogenic Tectonic Analysis

Author(s):: LI Zhe; ZHENG Yong; (Institute of Geophysics & Geomatics,China University of Geosciences,Wuhan 430074,Hubei,China)

Keywords:: the Shanxi Rift; crustal velocity structure; the Double-difference Tomography; seismogenic tectonic

CLC:: P315.24

DOI:: 10.20015/j.cnki.ISSN1000-0666.2022.0055

Abstract:: The Shanxi Rift Zone is a transitional region of differential disruption located in the central part of the North China Craton.In the northern part of the Rift there are more active tectonic movements due to the influence of the Datong Volcanic Belt,and the Rift’s structures including the seismogenic structure are important for understanding the dynamical and seismogenic mechanisms of the region.In this paper,the velocity structure of the crust and seismogenic structures in the northern Shanxi Rift Valley is imaged by the Seismic Double-difference Tomography.It is found that:① The seismogenic depth in the northern Shanxi Rift is shallow and the fracture structure is complex.In the shallow part of the crust,the velocity anomaly coincides with the topographic structure; ② In the middle and lower crust,the velocity structure mainly influenced by the material below the volcanoes features some low velocity anomalies; ③ On one side of the Shanxi Rift,the Taihang Mountains have shallower roots compared with the Luliang Mountains on the other side,and there are obvious high velocity anomalies below the northern end of the Luliang Mountains.This may be related to the differential disruption of the North China Craton.

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Last Update: 2022-08-01