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汶川8.0级地震前后四川及邻区构造应力场研究
引用本文:阮祥,程万正,杜方,张致伟,刘丽芳,黄世源.汶川8.0级地震前后四川及邻区构造应力场研究[J].中国地震,2010,26(2).
作者姓名:阮祥  程万正  杜方  张致伟  刘丽芳  黄世源
作者单位:四川省地震局;云南省地震局;重庆市地震局;
摘    要:收集整理了四川、云南、重庆3省市的数字地震波记录资料,反演该区域的中小地震震源机制解,并利用这些结果采用力轴张量法计算给出5个主要构造带(区)在汶川8.0级地震前后的平均应力场.对比汶川地震前后各主要构造带(区)应力场的状态发现,龙门山构造带南段、鲜水河构造带南段在汶川地震前后局部应力扰动明显,即震后平均应力场方位扰动值相对变化较大;鲜水河构造带南段、龙门山构造带南段和华蓥山构造带中段震后逆倾型地震明显减少.分析认为,这是巨大地震前后大范围地壳应力状态变化或调整的一种反映.

关 键 词:汶川8.0级地震  震源机制  应力扰动  构造应力场

Research on the tectonic stress field in Sichuan and its adjacent areas before and after the Wenchuan Ms8.0 earthquake
Ruan Xiang,Cheng Wanzheng,Du Fang,Zhang Zhiwei,Liu Lifang,Huang Shiyuan.Research on the tectonic stress field in Sichuan and its adjacent areas before and after the Wenchuan Ms8.0 earthquake[J].Earthquake Research in China,2010,26(2).
Authors:Ruan Xiang  Cheng Wanzheng  Du Fang  Zhang Zhiwei  Liu Lifang  Huang Shiyuan
Institution:Ruan Xiang1) Cheng Wanzheng1) Du Fang1) Zhang Zhiwei1) Liu Lifang2) Huang Shiyuan3) 1) Earthquake Administration of Sichuan Province,Chengdu 610041,China 2) Earthquake Administration of Yunnan Province,Kunming 650224,China 3) Earthquake Administration of Chongqing Municipality,Chongqing 401147,China
Abstract:After collecting digital seismic waveform records from Sichuan,Yunnan and Chongqing Seismic Telemetry Networks,we inverted focal mechanism solutions of moderate and small earthquakes in corresponding regions. On the basis of these results,the mean stress field of five main tectonic zones before and after the Wenchuan MS8. 0 earthquake has been worked out. Comparative study on each main tectonic zone before and after the Wenchuan MS8. 0 earthquake shows the complicated state of stress field. Local stress dis...
Keywords:Wenchuan MS8  0 earthquake Focal mechanism Stress disturbance Tectonic stress field  
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