关键词: 活动断裂, 可控源音频大地电磁测深, 北京东部平原地区

Abstract: There are multiple Quaternary buried active faults in the eastern Beijing plain region based on the results obtained from geological and geophysical studies.In order to investigate the condition of bedrock surface undulation,geometry of the buried faults and the extension of fault planes in the eastern Beijing plain area,two CSAMT profiles were completed in Miaojuan,Shunyi district and Sunhe,Chaoyan district in early 2010.The paper presents the advantages of CSAMT in exploration of buried active faults,the data collection procedure and the methods used for data processing.Combining with regional geological data,we make integrate interpretation to the geological structures of the study region.The results show that the CSAMT method can be used effectively in the exploration of buried faults.It can reveal the location,dip,displacement,and size of faults in the survey area,which provide reliable and elemental information for geological analysis.This method has become an important geophysical tool in buried fault detection and plays an increasingly important role in exploration of active faults in urban areas.

Key words: active fault, CSAMT, eastern Beijing plain