CSAMT在城市隐伏断层探测中的应用

THE APPLICATION OF CSAMT EXPLORATION TO DETECTING URBAN CONCEALED FAULTS

介绍了CSAMT在城市隐伏断层探测中数据采集、资料处理方法和克服电磁干扰的技术措施。已有地质资料显示,北京昌平规划新区内存在多条隐伏断层。为了给规划新城提供基础地质资料,查清区内断层的准确位置、产状以及断层两侧的基岩埋深,布设了4条CSAMT剖面。结合地质资料对4条剖面进行了综合解释,给出了断层的准确位置。结果表明CSAMT在本区隐伏断层探测中的应用是有效的,可在城市隐伏断层探测中发挥重要作用。

This paper introduces the technical measures of the CSAMT in the detection of urban faults in the aspects of data acquisi- tion, data processing and methods of overcoming the electromagnetic interference, on the basis of geological data available. There are multiple buried faults in the new district planning of Changping District in Beijing, as shown by the existing geological data. In order to provide the basic geological data for the new district planning and identify the exact location and attitude of the fracture as well as the buried depth of the bedrock on both sides of the fracture, the authors arranged four CSAMT profiles in the study area, obtained a com- prehensive explanation of the 4 profiles, and determined the accurate location of the fault. The results show that the CSAMT is effective in buried faults detection and can play an increasingly important role in the exploration of buried faults in urban areas.