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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
Source PublicationJournal of Asian Earth Sciences
2016-05
Volume121Pages:153-164
DOI10.1016/j.jseaes.2016.03.008
Indexed BySCI
KeywordNorth China Basin Intraplate Earthquake Moho Upheaval Lithospheric Rheological Structure Stress Concentration
Abstract

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. 

Funding ProjectNational Natural Science Foundation of China[41404075] ; National Natural Science Foundation of China[41590860] ; CAS/CAFEA[KZZD-EW-TZ-19] ; China National Science and Technology Support Program[2012BAK19B03-5]
Funding OrganizationNational Natural Science Foundation of China[41404075, 41590860] ; CAS/CAFEA[KZZD-EW-TZ-19] ; China National Science and Technology Support Program[2012BAK19B03-5]
Language英语
Subject Area固体地球物理学
MOST Discipline Catalogue理学 ; 理学::地球物理学
SubtypeArticle
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Publication PlaceTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
ISSN1367-9120
URL查看原文
WOS IDWOS:000378455600012
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS KeywordWAVE VELOCITY STRUCTURE ; UPPER-MANTLE BENEATH ; TIBETAN PLATEAU ; P-WAVE ; EASTERN MARGIN ; CRUSTAL ; CRATON ; EVOLUTION ; REGION ; SEISMOTECTONICS
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12313
Collection个人在本单位外知识产出
Corresponding AuthorLiu Chang
Affiliation1.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
Recommended Citation
GB/T 7714
Liu Chang,Zhu BJ,Shi Yaolin. 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.(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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