广东省揭西县淘锡湖锡多金属矿床成矿花岗岩研究  

On ore-forming granite of the Taoxihu tin-polymetallic deposit in Jiexi County,Guangdong Province

作　　者：钱龙兵 余庆亮 郭丽荣 颜伦明 温辉 QIAN Long-bing;YU Qing-liang;Guo Li-rong;YAN Lun-ming;WEN Hui(931 Party of the Nonferrous Metals Geological Bureau of Guangdong Province,Shantou 515041,China)

机构地区：[1]广东省有色金属地质局九三一队,汕头515041

出　　处：《华东地质》2018年第3期218-226,共9页East China Geology

基　　金：中国地质调查局"广东莲花山断裂带南西段锡铜多金属矿整装勘查区关键基础地质研究及专项填图与技术应用示范(编号:12120114015901)"和"广东双华-平安镇地区矿产地质调查(编号:12120114008701)"项目联合资助

摘　　要：广东省揭西县淘锡湖锡多金属矿床位于粤东地区莲花山断裂带南西段,为中型锡多金属矿床。文章以与矿化关系密切的花岗斑岩为研究对象,从花岗斑岩与成矿的物质来源、时空关系等方面进行系统研究。主量、微量元素、S同位素及锆石Hf同位素分析结果表明:花岗斑岩为该区成矿提供物质来源;花岗斑岩LA-ICP-MS锆石U-Pb年龄为141.8±1.0 Ma,表明其形成于早白垩世初期,与锡石毒砂共生的辉钼矿Re-Os同位素等时线年龄为139.0±1.1 Ma,与花岗斑岩的形成时间基本相同。结合矿区地质特征,认为花岗斑岩是淘锡湖锡多金属矿床最主要的成矿花岗岩。The Taoxihu tin-polymetallic deposit, located in the southwestern section of Lianhuashan fault belt in the eastern area of Guangdong Province, is a medium-sized hydrothermal vein-type Sn-Pb-Zn deposit in Jiexi County. The study focused on granite porphyry closely related to mineralization so as to sysmatically analyze ore-forming source and tempo-spatial relationship of this deposit. Geochemical, S isotope and Hf isotope analysis results show that the granite porphyry provided ore-forming materials for the deposit. LA-ICP-MS zircon U-Pb age of granite porphyry is 141.8±1.0 Ma. Re-Os isochron age of molybdenite associated with cassiterite and arsenopyrite is 139.0±1.1 Ma, which is almost the same age as that of granite porphyry. Combined with the geological features of the mining area, granite porphyry is inferred as the most important metallogenic parent rock in the Taoxihu tin-polymetallic deposit.

关 键 词：锆石U-PB年龄 花岗斑岩 淘锡湖锡多金属矿 莲花山断裂带 广东 

分 类 号：P618.44[天文地球—矿床学]