摘要
在北京通州副中心地区开展了高精度重力、可控源音频大地电磁测深与微动测深的综合物探工作,通过多方法解译结果的比对分析,重新厘定了燕郊断裂位置,并在其北侧新发现一条支断裂,推断结果得到了钻孔验证。研究表明,在城市复杂人文电磁干扰环境下,采用重、电、震的组合方法调查断裂构造是有效、可行的。查明燕郊断裂及其支断裂的空间展布特征,对于北京城市副中心地热资源开发利用及地质灾害防治具有重要意义。
The integrated geophysical exploration work of high-accuracy gravity,CSAMT and microtremor survey was carried out in Tongzhou District,capital subcenter of Beijing,the position of Yanjiao fault was redetermined and one new branch fault was discovered in the north of Yanjiao according to repeated comparison and analysis of different results interpreted in many ways. In addition,the results were proved by some boreholes. These surveys indicate that the utilization of combinational method of gravity,electricity and vibration to investigate the fault structure won't be feasible under the disturbance of the complex electromagnetic environment in cities.The spatial layout features of Yanjiao fault and branch fault will be significant in the development of geothermal resources and prevention of geological disasters.