可控音频大地电磁测深在城市隐伏断层探测中的应用

The application of CSAMT exploration to detecting buried faults in city

为了给城市工程建设规划提供基础地质资料,需查明区内断裂的准确位置、产状、覆盖层厚度及空间展布以及深部断面。利用可控源音频大地电磁法(CSAMT)进行勘察工作,结合已知地质资料与地球物理资料,在测区内布设四条剖面,完成了剖面反演及综合解释,给出了区内断裂的准确位置、倾向及发育规模。结果表明:CSAMT法在隐伏活动断裂探测中应用是有效的,地质分析工作提供可靠的基础资料,可在城市隐伏断层探测中发挥重要作用。

In order to provide basic geological information and geophysical studies for urban construction plans,it is necessary to identify the precise location of faults as well as their occurrence,thickness and the extension each fault.In this work,we used controlled source audio-frequency magneto telluric（CSAMT） method for the exploration of buried active faults.The authors arranged four CSAMT profiles in the study area and obtained inversion results and a comprehensive explanation of four profiles.This method can reveal the location,dip,and size of faults in the survey area.The results show that the CSAMT is effective in buried faults detection.This method has become an important geophysical tool in buried fault detection and plays an increasingly important role in the exploration of active faults in urban areas.