摘要
永定河断裂是北京地区一条重要的北西向断裂,本文利用浅层地震勘探、重力剖面测量、可控源音频大地电磁测深等地球物理探测手段,查明了永定河断裂在北京南部的展布特征。研究认为,永定河断裂在北京南部呈北西向断裂带产出,主断裂是倾向北东的正断层,倾角约70°,具有左旋走滑特征。在其南东侧平行主断裂发育两条次级断裂,倾向南西,剖面上与主断裂构成地垒型式。
The Yongding River fault is an important NW-trending fault in Beijing. Some geophysical exploration methods, including CSAMT method, shallow seismic exploration and gravity profile survey, were used to find out the distribution characteristics of the Yongding River fault in southern Beijing. The research shows that the Yongding River fault strikes NW-trending, and consists of main fault and secondary faults. The main fault is a NE dipping sinistral-slip normal fault, and the dip angle is about 70°. Two secondary faults were found out on the southeast side of the main fault, which were parallel to the main one. The secondary faults inclined to the southwest and formed horst with the main fault.
作者
魏波
何付兵
董静
刘立岩
张巍
WEI Bo;HE Fubing;DONG Jing;LIU Liyan;ZHANG Wei(Beijing Institute of Geological Survey,Beijing 100195;Institute of Geology,China Seismological Bureau,Beijing 100029)
出处
《城市地质》
2018年第2期31-36,共6页
Urban Geology
基金
中国地质调查局项目"京津冀协同发展区活动构造与区域地壳稳定性调查"(121201104000150012)和"北京1:5万琉璃河
庞各庄
安次县幅区域地质调查"(12120114007701)联合资助
关键词
永定河断裂
地球物理探测
南东段
北京南部
The Yongding River fault
Geophysical exploration
Southeast part
Southern Beijing
