The Metallogenic Geologic Features And Metallogenic Regularities Of Daishan Area In Anhui Province

The Daishan area of Dingyuan County,Anhui Province is located in the middle section of the Zhangbaling uplift,east of the Tanlu fault zone.The outcropped strata in this area is mainly consisted of the Zhangbailing Group(North Jiangjun Formation and Xiliangyan Formation)of the Qingbaikouan Period.The structure is mainly controlled by the Tan-Lu fault zone.The sharp of the Mesozoic Wawuliu intrusion is controlled by the NNE direction fault along the Tanlu fault zone.In addition,there are plenty dioritic vein intrusion in the contact zones.Predecessors have already discovered numbers large and small copper-gold deposits and ore occurrences in this area.This area is a favorable district to form the gold polymetallic depositralization.This paper is based on previous research and funded by the project “1:50000 Mingguang et Depositral Geological Surveys”.Through the 1:10000 geochemical exploration and 1:500 geochemistry profile surveys,we analyzed the geochemical characteristics of the magmatic intrusions in Shangzhang area.Through the analysis of silicate,rare earth and trace elements in magmatic intrusions in metallogenic area,we discussed the origin of magmatic intrusions and their relationship with depositralization.Finally,based on the collected datas of the deposits and ore occurrences,and the distribution and geological characteristics of gold deposits(occurrences),we studied the Xiaomiaoshan gold deposit to summarize the metallogenic regularity,including depositralization control conditions,spatial and temporal distribution features,metallogenic model,and prospecting indicators.