The Geological Characteristics Of Dexing Yinshan Copper-lead Zinc Deposit, Mining Exploration And Evaluation Work Of Deep Resources

Dexing Yinshan copper-lead-zinc deposit is a polymetallic deposit closed to the role of Mesozoic intermediate-acid volcanic-subvolcanic hydrothermal of continental. This paper summarizes the geological background and ore-controlling factors of the deposits, on the basis of carrying out mining exploration and evaluation work of deep resources,with a detailed study of the deep geological features in the Nine districts and the North Mountain ore deposits, and discusses the genesis, knowledge and results obtained are as follows:1,Based on the 1:200000 and 1:50000 geological survey and research data, This paper divides the Late Proterozoic tectonic unit, summarizes the history of tectonic evolution of the study area. In Sibao, the southern and northern Yangtze plate collision between each other to spliced together, in Jinning Yangtze Plate and the Chinese plate collisioned in the Jiangshao fault zone (Shaoxing-Shiwan Mountain area), inferred the band (Shi-Hang rift zone)is Mesozoic rift zone. Yinshan deposit's position is at the north side of Shi-Hang rift zone.2,Through the analysis of geological data, the Kongjia-Yinshan volcanic basin is designated as the Upper Jurassic Swan Lake Ridge group in the 1:200000 and 1:50000 Geological mapping time, the evidence is not sufficient. get Yinshan associated with volcanic and subvolcanic zircon LA-ICP-MS U-Pb age of about 180Ma to determine kongjia-Yinshan volcanic basin as a product of the early Jurassic, the Upper Jurassic Goose Lake in regional does not belong to the same layer. Currently,this basin is the only mineralization basin discovered during the volcanic basin in South China.3,Further study the ore-bearing of volcanic and sub-volcanic rocks and ore-controlling factors of Yinshan, and also have a better understanding of the alteration-mineralization zoning and ore type.4,Roughly identified the deep ore bodies by the number, size, shape, occurrence, ore minerals and gangue minerals of the type and content, symbiotic combination and fabric characteristics of the ore of the Nine district and North mountain. Comparative analysis of the harmful components useful in deep ore types, content and distribution, by type of mineral industries. Nine district of the ore body were tried to Delineation of ore body by gold, a gold grade of≥0.5g/t copper and gold ore delineation of the possibility of a useful type of experiment and explore.5,According to deep ore exploration and evaluation of resources of the Nine districts and the North Mountain, copper-gold deposit reached to large-scale, Pb-Zn-Ag-S reached to medium-sized deposits.