SCSIO OpenIR  > 中科院边缘海地质重点实验室
Dynamic responses of the Xianshuihe and Longmenshan fault zones to regional tectonic loading
Wang Xiao-Fang; Xiao Jie; Xu He-Hua; He Jian-Kun; Wang, XF (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China.
2016
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
Volume59Issue:4Pages:1403-1413
AbstractIn order to study the trigger interaction; between the Wenchuan earthquake and the earthquakes on the Xianshuihe fault zone as well as the stress changing with the effect of regional tectonic loading, we have studied the seven major earthquakes in the Xianshuihe and Longmenshan fault zones. The regional tectonic loading is approximated by velocity boundaries from GPS data. The split-node technique was used to simulate the earthquakes in upper crust. With the three-dimensional viscoelastic finite element code we simulated the evolution of Coulomb stress. The results show that the trigger interaction between the Wenchuan earthquake and the earthquakes on Xianshuihe fault zone is different. The trigger interaction is obvious on the Xianshuihe fault zone (except the Litang earthquake in 1948 and the Luhuo earthquake in 1973), as 17 to 38 percentages' Coulomb stress increasing was caused by regional tectonic loading, other 49 to 67 percentages of stress was contributed by earthquake deformation. However, part of the Coulomb stress was released by the earthquakes that happened from 1893 to 1981. So it is impossible that the Wenchuan earthquake was triggered by the earthquakes in the past. The Coulomb stress in the Wenchuan earthquake was mainly increased from regional tectonic loading. With occurrence of this earthquake, the certain region released almost all the Coulomb stress and became into a new condition.
Department[Wang Xiao-Fang; Xu He-Hua] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Xiao Jie; He Jian-Kun] Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China ; 边缘海地质
KeywordWenchuan Earthquake Longmenshan Fault Zone Xianshuihe Fault Zone Coulomb Failure Stress Finite Element Modeling
Subject AreaGeochemistry & Geophysics
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/15588
Collection中科院边缘海地质重点实验室
Corresponding AuthorWang, XF (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China.
Recommended Citation
GB/T 7714
Wang Xiao-Fang,Xiao Jie,Xu He-Hua,et al. Dynamic responses of the Xianshuihe and Longmenshan fault zones to regional tectonic loading[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2016,59(4):1403-1413.
APA Wang Xiao-Fang,Xiao Jie,Xu He-Hua,He Jian-Kun,&Wang, XF .(2016).Dynamic responses of the Xianshuihe and Longmenshan fault zones to regional tectonic loading.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,59(4),1403-1413.
MLA Wang Xiao-Fang,et al."Dynamic responses of the Xianshuihe and Longmenshan fault zones to regional tectonic loading".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 59.4(2016):1403-1413.
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