Abstract:
Zhanggong mountain area belongs to the Jiangnan W-Sb-Au-Sn polymetallicmetallogenic belt of Jiu ridge– Zhanggong mountain W-Sb-Au mineralization belt.Ore-forming geological characteristics,metal elements distribution characteristics,geological and geochemical characteristics,and ore-controlling geological conditions of ore deposit/point are researched and research results show:Au and Cu-Pb-Zn polymetallic mineralization controlled by Xikou rocks and Yaoli-Jiangtan tectonic rock zone mainly originated from the late brittle tectonic fracture zone of ductile deformation zone overlay,and occurrence in the secondary faults and fissures;Sb,W,Mo closely related to Yanshanianmagmatic hydrothermal activities,occurrence in rock mass and the inner and outer contact zone;Au,W,Sn,Bi as the study area advantage oreforming metal;Zhangyuansource rock and Neoproterozoic strata(including Xikou rocks and Shuangqiaoshan group)have the feature of crust-mantle mixed source,and indicate that crust-mantle interactions involved in mineralization;acidic vein rocks formed in the basic of late Jurassic and early cretaceous age,which are in the mid-term acidic intrusive rock mass,are the same of the late magmatic evolution;mafic vein rocks and late cretaceous basalt magma source characteristics and genesis of affinity,are closely related to the continental crustal extension and tectonic setting;the secondary fracture of ductile deformation zone overlay system formed by altered fracture zone and fracture zone in the late of extrusion stretch of the physical andchemical,and extrusion fracture zone on both sides of the tensile fracture zone are ore positions;the area is metallogenic characteristics of Yanshan period mainly,whose characteristics are early dynamic thermal metamorphic mineralization and late magmatic hydrothermal superimposed mineralization.