【摘要】 通过收集前人有关地震地质、地球物理等资料,在综合分析的基础上,研究了麻城1932年6级地震的发震构造,并探讨了其孕震构造机制。研究认为,麻城—团风主干断层为该地震的发震构造,次级断层受主干断层控制;震中区处于区域重力、磁力异常区,区内存在低阻层;麻城6级地震是在区域NEE向现代构造应力场的作用下,壳幔尺度垂直隆升共同作用的浅源地震事件;壳幔深度的上隆及NEE向的构造主压应力分别成为该区处于伸展构造环境和具有剪切走滑性质的主要动力来源。更多还原

【Abstract】 Based on the previous seismological,geological and geophysical data,seismogenic structure and mechanism of the Macheng M6 earthquake occurred in 1932 were studied.It is concluded that the seismogenic structure of the earthquake is the Macheng-Tuanfeng main fault,by which some branch faults are controlled.The focal area is characterized by an anomaly of regional gravity and magnetic field.There exists a layer with low-resistivity in the crust in this area.The dynamic source,which leads to the tensional and right-lateral strike slipping motion of the fault,derives from the lifting of the crust and mantle and the principal compressional stress along NEE tectonic.更多还原