安徽铜陵蛤蟆岭铜金钼矿地质地球化学特征及成因探讨  

GEOLOGICAL AND GEOCHEMICAL CHARACTERISTICS AND GENESIS OF THE HAMALING COPPER,GOLD AND MOLYBDENUM DEPOSIT IN TONGLING,ANHUI

作　　者：刘沙沙 陈林杰[1] 李忆南 LIU Sha-sha;CHEN Lin-jie;LI Yi-nan(No.321 Unit of Bureau of Geology and Mineral Exploration of Anhui Province,Tongling,Anhui 244033,China)

机构地区：[1]安徽省地质矿产勘查局321地质队,安徽铜陵244033

出　　处：《安徽地质》2020年第4期287-291,共5页Geology of Anhui

基　　金：中国地调局项目“安徽铜陵矿集区找矿预测”(12120115034501);安徽省国土资源科技项目“安徽沿江地区中生代岩浆成矿系列及矿化富集规律研究(2015-K-1)”;安徽省地质勘查基金项目“安徽省铜陵县蛤蟆岭金矿普查”(2015-2-3)资助。

摘　　要：蛤蟆岭铜金钼矿是铜陵地区重要找矿新发现之一,矿体类型有斑岩型、矽卡岩型、层间破碎带角砾岩型和热液脉型,均属于统一的岩浆热液成矿系统,其中赋存于岩体与奥陶纪地层接触带附近的层间破碎带角砾岩型和矽卡岩型铜金钼矿体是在铜陵地区首次发现。控矿岩体为蛤蟆岭花岗闪长岩体,LA-ICP-MS锆石U-Pb年龄(140.2±1.4)Ma,辉钼矿Re-Os同位素年龄(138.4±1.9)Ma。该矿床的发现将铜陵矿集区金属矿赋矿地层拓展到早古生代奥陶纪地层,向深部拓展了找矿空间,对未来深部资源勘查具有重要指示意义。The Hamaling copper-gold-molybdenum deposit is one of the important discoveries made recently inthe Tongling area.The ore body types involve porphyry,skarn,interbedded fracture zone breccia and hydrothermal vein,which all belong to a unified magmatic hydrothermal metallogenic system of late Jurassic-early Cretaceous(135Ma-147Ma)in age.The breccia and skarn copper-gold-molybdenum ore bodies were found in the interbedded fracture zone near the contact between rock mass and Ordovician strata,which is the first find in the Tongling area.The ore-controlling rock mass is the Hamaling granodiorite rock mass with zircon LA-ICP MS U-Pb age of 140.2±1.4Ma,and molybdenite Re-Os isotope age of 138.4±1.9Ma.The discovery of this deposit indicates that the host rock can be deeper to the lower Paleozoic Ordovician stratain the Tongling ore-deposit cluster,which is of great significance for the future deep resource exploration.

关 键 词：锆石U-PB年龄 矿床成因 铜金钼矿 蛤蟆岭 铜陵矿集区 

分 类 号：P611[天文地球—矿床学]