中文摘要：

本文应用平衡剖面的基本原理，通过斜向简单剪切模型预测了潍北凹陷北部古城-潍河口断裂的深部形态。依据此方法得出古城-潍河口断裂的滑脱深度为10．4km。以新近系底面为参考面，测量了新近系的损失面积，并计算了新近纪潍北凹陷的理论伸展量为3．1km。与目前二维地震解释剖面对比可知，亚分辨正断层的总伸展量为0．8km。依据统一构造应力场形成的断裂系统具有相似性的基本认识，对亚分辨正断层的分布和产状进行了定性预测。

英文摘要：

The basic rule of balanced cross section is applied in this research. The oblique simple shear model is used to predict the geometry of Gucheng-Weihekou fault in north of Weibei basin. According to this model the depth of the detachment is about 10. 4km. According to the referenced bed＇ which is the bottom of Neocene, the Lost Area is measured, and the total amount of extension in Neocene in Weibei basin is about 3. lkm. Compared with the intcrpretation from 2D seismic profile, the amount of extension resulted from sub-resolution normal fault is about 0. 8km. In the same tectonic stress field, the fault systems in different levels are similar. According to this, the distribution and attitude of the subresolution normal fault are predicted.