A SIMPLE ANALYSIS OF THE GEOTECTONIC EVOLUTIONAL CHARACTERS OF TONGLIN AREA,ANHUI

Tonglin area is one of the areas where there exist many copper ore deposits.The geotectonic property has many titles.Most of geological scholars call it the lower Yangtze platform depression and divide the geotectonic stages into formation of basement,sedimentaion of cover and intreplate deformation.According to the diwa theory,this paper classifies it as the Jiangsu-Hubei geodepressional system of the Central China geodepressional region.According to the analysis of the features of structural layers,the geotectonic evolution of the region is divided into four stages: pre-geosyncline,geosyncline,platform and diwa.