【摘要】 从地震空间分布、与库水位变化关系以及震源深度特征等方面,探讨三峡库首区地质构造与地震活动的特征。结果表明,地震主要集中分布在巴东的东瀼口、火峰、秭归泄滩、高桥断裂以及仙女山断裂附近。东瀼口、火峰地区岩溶发育,地震多为岩溶塌陷型水库地震;泄滩附近多滑坡和煤矿采空区,属矿塌和浅表卸荷型地震;高桥断裂和仙女山断裂附近的地震则主要与断裂构造相关,属构造型地震。更多还原

【Abstract】 The tectonic structure and seismicity were analyzed by the space distribution of earthquake,the water level changes and focal depths of seismicity. The result shows that the earthquakes are mainly distributed in the Dongrangkou,Huofeng,Xietan area,and along the Gaoqiao fault and Xiannüshan fault. In the Dongrangkou and Huofeng areas,the earthquakes are mainly caused by Karst collapse. And for the earthquakes in the Xietan area,they are closely related with landslid and coal mine,and the genesis can be contributed to the mine collapse and superficial unloading. Whereas,those earthquakes along the Gaoqiao fault and Xiannüshan fault are mainly caused by the structures.更多还原