赣杭构造带前寒武纪构造格局的探讨

DISCUSSION ON THE PRECAMBRLAN STRUCTURAL FRAMEWORK OF THE GAN-HANG TECTONIC BELT

对华南前寒武纪构造格架的认识，在长期的研究中不断取得进展。本文通过对前寒武纪建造、构造的综合分析研究认为：华夏古陆是一个被肢解了的早元古代古大陆；中元古代晚期浙西－赣东北地区是华夏古陆的活动大陆边缘；武陵运动是华南一次最重要的造山运动，华夏古陆与扬子地块沿赣东北断裂带发生碰撞，形成了统一的“华南古大陆”。由于区域地质条件不同，各地晚元古代构造演化有明显的差异；加里东期本区为浙西－赣东北坳拉槽。

Progresses have been made successively on the study of the precambrian structural framework of the southern China. The comprehensive analysis and study on the precambrian formations and structures suggest that:the cathaysia is a dismembered Early proterozoic old-land, the western Zhejiang-Northeast Jiangxi region was located at the active continental margin of the cathaysia during the late stage of middle Proterozoic, Wuling movement is the most important orogeny in the southern China,and the collision between the cathaysia and the Yangtze block along the Gangdongbei fault belt led to the formation of a united south China old -land. Because of different regional geological conditions,there exists evident difference in the late proterozoic tectonic evolution in diffetent parts of the cathaysia,During caledonian period,the studied region was developed into the Western Zhejiang Northeast Jiangxi aulacogen.