Based on both the division of structural laygers and the analysis of its evolutionary characteristics,the tectonic evolutional history in this area can be divided into three stages: (1)Archaean geosyncline developement stage;

• 通过对区内构造层的划分和其演化特征的分析,区内地质构造演化可划分为三个阶段:1)太古代地槽发展阶段;