薄壁断裂峪河口至方庄段电性结构特征

Characteristics of the electrical structure in the southern segment of Baobi fault

为研究薄壁断裂南段的电性结构特征,采用高密度电阻率层析成像探测方法,对薄壁断裂在峪河口以南至方庄镇段的电性结构进行探测,共布设4条测线,总长度为10.47 km,探测结果揭示在测线下方存在有明显的电阻率间断面,认为是薄壁断裂在该处的反映。结合已有地质地球物理结果,认为薄壁断裂具有明显的分段特征,以峪河口为界,以北至上八里镇石门河出山口处,在第四纪早期有明显活动,以南至方庄镇附近为隐伏断裂,走向NE,倾向SE,倾角约为60°,上断点深度为30 m。

In this study,the high density resistivity imaging method was used to detect the electrical structure in the southern segment of Baobi fault,which lies geographically from Yuhekou to Fangzhuang.As a result,some obvious resistivity discontinuities were revealed below the survey lines.With the aid of surface geological cognition,the authors infer that one of the discontinuities corresponds to Bobi fault.Furthermore,the authors discussed the segmentation of the Bobi fault by combining the previous results of geology and geophysics.The authors consider that Yuhekou is the boundary point.