综合勘察方法在活动断层填图中的应用——以锦屏山-小金河断裂(四川境段)为例

Application of Comprehensive SurveyMethod in Active Fault Mapping,Taking the Jinpingshan-Xiaojinhe Fault(in Sichuan Section) as an Example

锦屏山-小金河断裂(四川境段)部分区域地面断层出露较差、地貌特征不明显,根据现场实际情况,采用资料收集分析、浅层地震勘探、高密度电法勘探和探槽开挖相结合的综合勘察方法,多种方法相互验证、进行综合解释分析,重点查明活动断层位置、几何特征形态、错断地层时代等,为1:5万活动断层填图工作提供重要依据。

The ground faults are poorly exposed and the geomorphic features are not obviousin some areas of Jinpingshan-Xiaojinhefault(in Sichuan section).According to the actual situation,a comprehensive survey method combining data collection and analysis,shallow seismic exploration,high-density electrical exploration and trough excavation were adopted.Various methods were mutually verified and comprehensive interpretation and analysis were carried out,focusing on identifying the location of active faults,geometric features and forms,and the age of faulted strata.The above research provided an important basis for the mapping of 1:50,000active faults,and reference for the follow-up active fault detection work.