Anhui Anqing Copper Deposit, Geological And Geochemical Characteristics And Genetic Analysis

The Anqing copper deposit, one of the important copper-iron deposits in the Middle-Lower Yangtze Valley metallogenic belt, is located on the eastern branch of Yuanshan intrusion,the middle of the northern margin of Yangtze block. Integrating the regional geological background,geological characteristics of deposit and orebodies , the thesis summarized the minerogenetic geological condition and the distribution regularity of trace elements,REE of Anqing copper deposit, researched the ore-forming geological conditions, the ore-controlling factors and the genesis of deposit and etc. The main achievements are made as follows:1 .Based on the regional geological setting of ore-forming processes and the geological characteristics of deposit, researched the characteristics of orebody and ore comprehensively. According to the mineral association, divided the metallogenesis of the copper deposit into three periods and five stages.2.By researching the lithogeochemical characteristics and the geochemical characteristics of deposit, recognized that it is rich of W Bi, V,Ti,Cr,Co,Ni is around Vickers value in Anqing Granodiorite, which indicated that the primitive magma stemmed from various aspects, and has withstood the assimilation of Crust fiercely.3. Discussed the relation between the stratum,the structure, the magmatic rock and ore-forming, the stratum offered some of the metallogenic materials; the structure is an important factor of mineralization that controlled the invasion of the magma and the formation of rock mass and orebody; Yanshanian magmatic rock is the advantaged mineralization parent rock .4.Based on the study of the geological characteristics of deposit, the geochemical characteristics and the ore-controlling factors, got that the formation of Anqing copper deposit have close relations to the activities of Yanshanian intermediate-acid magma intrusion. On the whole, although the injection-function has the effect on the mineralization, Anqing copper mine is the medium-low temperature skarn deposit of the magmatic hydrothermal fluid.