摘要
对肇庆地区重磁资料系统处理得到的图像进行解释和研究,认为肇庆地区深部存在近东西向、北西向、北东向三组断裂系统,东西向肇庆-广州断裂横贯全区,深及30km以上。北西向肇庆-开平断裂图像反映很清楚,但切割深度相对较浅,在10km左右。北东向吴川-四会断裂规模较大,切割深度在20km左右。其中近东西向是深部主要断裂系统,也是主要活动断裂,它与北西向断裂交汇部位是中强震主要发震构造。
Based on analysis of gravity and magnetic data of Zhaoqing area, it is considered that there are three groups of fault systems in the directions of near EW, NW and NE respectively in deep underground of this area. Among them, the one in the near EW direction is Zhaoqing-Guangzhou fault which is the main fault system and crosses over the whole area, and has a dissected depth of over 30kin; the trace of Zhaoqing-Kaiping fault is dear, but its dissected depth is shallower （about 10kin） ; Wuchuan-Sihui fault （in the NE direction） has a large scale, the dissected depth is about 20km. The three groups of fault systems are also shown by the geological evidence. Combined with studies on the fault activities, it is indicated that the EW faults are the main active faults, and the intersection zones of the EW and NW faults are the main statutories of strong earthquakes.
出处
《华南地震》
2009年第1期42-52,共11页
South China Journal of Seismology
基金
广东重点课题项目(2003C32600Z)
关键词
深断裂
重磁资料
断裂活动性
发震构造
肇庆地区
Deep-seated fault
Gravity and magnetic data
Fault activity
Statutory
Zhaoqing area
作者简介
任镇寰（1938-），高级工程师．主要从事地震地质、新构造和地震预报研究．
