【摘要】 依据最新的辽宁及其邻近地区地壳上地幔三维地震波速结构 ,并考虑地质构造、断裂以及地壳深部的构造环境等因素 ,建立研究区的三维地质模型 ;结合震源机制解与原地应力测量资料 ,分析区域现代地应力场特征 ,确定了研究区的边界约束和动力边界条件 .在以上基础上 ,采用线弹性介质模型进行研究区三维构造应力场的有限元数值模拟 ,探讨研究区地壳应力场的基本特征 .对比分析表明 ,本区地壳内应力场的三维有限元数值模拟结果与已发生的地震有着较好的对应关系 ,并指出了值得注意的有潜在发震可能的地震危险区更多还原

【Abstract】 WT5BZ]Based on the latest result in research on 3D seismic wave velocity structure of crust and uppermost mantle and taking geological setting and fracture zones into consideration, a 3D geological model for the studied region is built up. The boundary constraint and force loading boundary condition for the model are determined according to the characteristics of crustal stress field deduced from earthquake focal mechanism and in situ stress measurement data. Using linear elastic material model a 3D finite element simulation is conducted to study the characteristics of crustal stress field. A comparison analysis between the simulated stress field and earthquake locations reveals that the moderate and strong earthquakes generally occurred in the zones with high shear stress gradient. Furthermore, the paper notices a few potential earthquake prone regions.更多还原