黎城盆地北缘黎城断裂的地球物理特征及活动性分析

Analysis of the Geophysical Characteristics and Activity of the Licheng Fault on the Northern Margin of the Licheng Basin

黎城断裂是晋获断裂构造带上的重要构造单元,查明其构造特征具有重要意义。在黎城盆地北缘针对黎城断裂进行了地球物理勘探和地质考察,对黎城断裂的活动性进行研究。浅层地震勘探和高密度电法勘探的结果表明,黎城断裂是一条第四系活动断裂,倾角较陡。地质剖面考察的结果表明晋获断裂受黎城断裂的影响明显,南北段存在巨大差异。综合以上研究成果,判断黎城断裂为第四系活动断裂,其对晋获断裂的控制作用明显。

The Licheng fault is an important structural unit in the Jinhuo fault tectonic zone,which is of great significance to identify the structural characteristics.On the northern margin of the Licheng basin,we conduct the geophysical exploration and geological survey of the Licheng fault and study the Licheng fault activity.Shallow seismic exploration and high-density resistivity prospecting results show that the Licheng fault is an active fault in the Quaternary sediment with a steep dip.The geological profile shows that the Jinhuo fault is greatly affected by the Licheng fault,where there is a large difference between the northern and southern sections.Based on the above-mentioned research results,we believe the Licheng fault is the Quaternary active fault that has an obviously controlling effect on the Jinhuo fault.The Licheng area is the most important segment by which the Jinhuo fault＇s activities exhibit the largest differences between the northern and southern sections,and is controlled and cut on the northern margin of the Licheng basin.Investigating the geological and geophysical characteristics of the Licheng fault has important significance on the study of the Licheng basin and the Jinhuo fault and performing a seismic activity evaluation.