3-D numerical simulation on influence of 1997 Mani earthquake occurrence to stability of tectonic blocks system in Qingzang and Chuandian zone using DDA plus FEM method
文献类型：期刊论文
| 作者 | Chen Zu-An1,3; Ling Bang-Hui2; Bai Wu-Ming1 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2008-09-01 |
| 卷号 | 51期号:5页码:1422-1430 |
| 关键词 | Mani earthquake Qingzang and Chuandian tectonic blocks discontinuous deformation analysis (DDA) numerical simulation |
| ISSN号 | 0001-5733 |
| 文献子类 | Article |
| 英文摘要 | Using 3-D Finite Element Method combined with Discontinuous Deformation Analysis, in large background of interaction among 3-D tectonic blocks in Qingzang and Chuandian zone, based on the GPS data and seismic focal mechanism, we compute initial displacement field and stress field in the studied zone, which agree basically with the results of GPS measurement and seismic focal mechanism distribution. Further the occurrence process of 1997 Mani earthquake with magnitude M(s)7.9 is simulated numerically, and feature of stress state change on each boundary fault of blocks is studied. (1) The maximum horizontal dislocation is 7 m with left rotation and strike; (2) The distribution of dislocation on vertical face of the seismic fault is totally similar with the inversion result from seismic wave information; (3) Maximum shear stresses contour is similar with the deformation field from D-INSAR; ( 4) The vertical displacement distribution computed on the surface across fault indicates that the fault sliding is adverse to north. Furthermore, distribution of Coulomb failure stress change on the boundary faults of Qingzang and Chuandian block system after Mani earthquake is calculated. It indicates that the Mani earthquake, except making Coulomb failure stress increase and stress concentration in ends of the seismic fault, causes Coulomb failure stress in upper crust layer to increase about 2MPa at the seismic fault where Kunlun Shan M(s)7.9 earthquake (H = 11 km) located at mid section of eastern Kunlun fracture occurred in 2002. and causes Coulomb failure stress in middle crust layer to increase about 0.7MPa at the seismic fault where Gerze M(s)6.9 earthquake (H=30 km) located at Karakorum fracture zone occurred in 2008. It seems to indicate that Mani earthquake has positive function to the two zones close to rupture strength and afterward occurrence of the two earthquake. The research results also indicate that 3-D DDA+FEM method developed by authors is available to apply in studying relationship between large earthquake occurrence and interaction of tectonic blocks. |
| WOS关键词 | NORTH CHINA ; DEFORMATION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000259591000015 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69766]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chen Zu-An |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Study Earths Deep Interior, Beijing 100029, Peoples R China 2.China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China 3.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen Zu-An,Ling Bang-Hui,Bai Wu-Ming. 3-D numerical simulation on influence of 1997 Mani earthquake occurrence to stability of tectonic blocks system in Qingzang and Chuandian zone using DDA plus FEM method[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2008,51(5):1422-1430. |
| APA | Chen Zu-An,Ling Bang-Hui,&Bai Wu-Ming.(2008).3-D numerical simulation on influence of 1997 Mani earthquake occurrence to stability of tectonic blocks system in Qingzang and Chuandian zone using DDA plus FEM method.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,51(5),1422-1430. |
| MLA | Chen Zu-An,et al."3-D numerical simulation on influence of 1997 Mani earthquake occurrence to stability of tectonic blocks system in Qingzang and Chuandian zone using DDA plus FEM method".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 51.5(2008):1422-1430. |
入库方式： OAI收割
来源：地质与地球物理研究所
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