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Lithospheric rheology and Moho upheaval control the generation mechanism of the intraplate earthquakes in the North China Basin
Liu Chang1,2,3; Zhu BJ(朱伯靖)4; Shi Yaolin3; Liu Chang, Email: liu@geologie.ens.fr
发表期刊Journal of Asian Earth Sciences
2016-05
卷号121页码:153-164
DOI10.1016/j.jseaes.2016.03.008
收录类别SCI
关键词North China Basin Intraplate Earthquake Moho Upheaval Lithospheric Rheological Structure Stress Concentration
摘要Many devastating intraplate earthquakes, such as the 1966 Xingtai earthquake (Ms 7.2) and the 1976 Tangshan earthquake (Ms 7.8), occurred in the North China Basin (NCB). This study aims to investigate the generation mechanism of the large intraplate earthquakes in the NCB and the spatial distribution of earthquake activity through numerical experiments. In order to simulate the interseismic stress accumulation process in the NCB, we set up several 3D finite element models based on different litho spheric rheological structure and apply boundary conditions of horizontal compression. We find that stress concentration with high rate in the regions where Moho upheaves is responsible for the large earthquakes in the NCB. During the interseismic period large stress rate is located nearly around the bottom of the brittle upper crust, where stress accumulates fast to reach fault strength and active the main shocks. Aftershocks in the seismogenic layers could be triggered by the main shocks. Two factors are critical to the crustal stress accumulation process. (1) The first is Moho upheaval in the seismic zones. (2) The second is viscosity contrast among the crustal layers. Our results support the lithospheric rheological structure in the NCB as following: the brittle upper crust, brittle-ductile transition in the middle crust, the ductile lower crust, and the ductile lithospheric upper mantle. 
项目资助者National Natural Science Foundation of China(41404075, 41590860) ; CAS/CAFEA(KZZD-EW-TZ-19) ; China National Science and Technology Support Program(2012BAK19B03-5)
语种英语
学科领域固体地球物理学
文章类型Article
ISSN1367-9120
URL查看原文
WOS记录号WOS:000378455600012
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
关键词[WOS]WAVE VELOCITY STRUCTURE ; UPPER-MANTLE BENEATH ; TIBETAN PLATEAU ; P-WAVE ; EASTERN MARGIN ; CRUSTAL ; CRATON ; EVOLUTION ; REGION ; SEISMOTECTONICS
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/12313
专题个人在本单位外知识产出
通讯作者Liu Chang, Email: liu@geologie.ens.fr
作者单位1.School of Earth Science and Geological Engineering, Sun Yat-sen University, Guangzhou, China
2.Laboratoire de Géologie, CNRS-UMR 8538, École Normale Supérieure, Paris, France
3.Key Laboratory of Computational Geodynamics, Chinese Academy of Sciences, Beijing, China
4.Department of Earth Sciences, University of Durham, Durham, UK
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GB/T 7714
Liu Chang,Zhu BJ,Shi Yaolin,et al. Lithospheric rheology and Moho upheaval control the generation mechanism of the intraplate earthquakes in the North China Basin[J]. Journal of Asian Earth Sciences,2016,121:153-164.
APA Liu Chang,Zhu BJ,Shi Yaolin,&Liu Chang, Email: liu@geologie.ens.fr.(2016).Lithospheric rheology and Moho upheaval control the generation mechanism of the intraplate earthquakes in the North China Basin.Journal of Asian Earth Sciences,121,153-164.
MLA Liu Chang,et al."Lithospheric rheology and Moho upheaval control the generation mechanism of the intraplate earthquakes in the North China Basin".Journal of Asian Earth Sciences 121(2016):153-164.
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