Abstract: Based on the analysis of the formation and evolution of the crystalline basement for the North China platform, the characteristics of huge ductile shear zone are studied. The zone in point were formed during the early Proterozoic time and can be subdivided into three systems trending northeast, with a width va-ring from saveral hundred meters to more than twenty kilometres, strenching for some thousand kilome-tres. Along these zone reworked gneiss and mylonite have been commonly developed. The relationship between the successive activition of major basement weakness zones that occurred later on and seismic activities is discussed here along with the general trend of recent adjustment of dis-placements and regular seismic activities.

Key words: North China, Ductile shear system, Basement

摘要： 在分析华北地台结晶基底形成演化的基础上,重点论述大型古老的韧性剪切带,以及它们作为主要的基底弱化带在后期的继承性活动。结合现今位移调整的总趋势和地震活动规律,讨论了沿基底弱化带的再活动与地震的联系。

关键词: 华北, 韧性剪切系统, 基底弱化带, 地震活动性