华南裂陷系的建造特征和构造演化

THE FORMATION FEATURES AND TECTONIC EVOLUTION OF THE SOUTH CHINA TAPHROGENIC SYSTEM

The crystalline rock series of Early Precambrian are located at the Yangzi and Cathaysian massifs. It can be inferred that two massifs were joined together in the late stage of Early precambrian according to the identity of the formation time of massifs,the similarity of the rock association and the interrelation of massifs tectonics. The South China taphrogenic system came out in the Late Precambrian when the integrate landmass was split. There are a series of reginal S-type faults in the taphrogenic system which controlled the tectonic deformation, sedimentary formation and volcanism. The South China taphrogenic system underwent extending stage in the Middle-Late Proterozoic and contracting stage in Early Paleozoic. At last,it closed in Guangxian movement at the end of Silurian. The dynamic process is related to the clockwise rotation of the Cathaysian massif and right-lateral wrench movement between two massifs.