邢北深部勘查区低角度正断层成因浅析

通过邢北深部勘查区钻孔中所见的断层构造迹象分析,认为原来部分定为高角度的正断层是受太行山隆起赞皇变质核杂岩东侧拆离构造带影响而派生的中、小型低角度正断层。由于变质基底与上覆沉积盖层之间为软硬差距较大的主拆离构造面,在其影响下,上覆地层发育了若干个次级拆离构造面,邢北深部低角度正断层正是受基底拆离构造影响而形成。

Low Angle Normal Fault Genetic Analysis in Xingbei Deep Part Exploration Area

Through fault structural indications analysis in the Xingbei deep. part exploration area, considered that part of originally recognized high angle normal faults actually are medium to small low angle normal faults derived from detachment structural zone in eastern part of Zanhuang metamorphic core complex, Taihangshan uplift. Since between the metamorphic basement and overlying sedimentary cover is the major detachment structural plane with large hardness contrast, under its impact, some secondary detachment structural planes developed in covering strata, thus the low angle normal faults in Xingbei deep part exploration area formed.