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Dynamic responses of the Xianshuihe and Longmenshan fault zones to regional tectonic loading
Wang, XF (Wang Xiao-Fang)1; Xiao, J (Xiao Jie)2; Xu, HH (Xu He-Hua)1; He, JK (He Jian-Kun)2; Wang, XF
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
2016
Volume59Issue:4Pages:1403-1413
DOIDOI: 10.6038/cjg20160421
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.
Subject Area地质学
WOS IDWOS:000373864400021
Language英语
Indexed BySCI
KeywordWenchuan Earthquake Stress Changes Coulomb Stress Evolution Sichuan Hazard System China
Cooperation Status国内
Department碰撞与隆升
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Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/7721
Collection图书馆
Corresponding AuthorWang, XF
Affiliation1.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Wang, XF ,Xiao, J ,Xu, HH ,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, XF ,Xiao, J ,Xu, HH ,He, JK ,&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, XF ,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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