内蒙古乌奴格吐山斑岩铜钼矿床硫铅同位素组成及其对成矿物质来源的指示  

Sulfer and lead isotopic composition of Wunugetushan porphyry Cu-Mo deposit in Inner Mongolia,and its implication for ore-forming material source

作　　者：谭钢 佘宏全[2] 李进文[2] 

机构地区：[1]中国有色金属建设股份有限公司,北京100037 [2]中国地质科学院矿产资源研究所,北京100029

出　　处：《矿产与地质》2017年第5期891-895,共5页Mineral Resources and Geology

基　　金：中国地质调查局项目(编号:12120115069901)资助

摘　　要：在矿相学研究基础上,对乌奴格吐山铜钼矿床的矿石矿物进行了硫铅同位素分析。该矿床金属硫化物的硫同位素组成比较均一,δ^(34)S集中在1‰~3‰,显示出岩浆硫特征。矿石矿物^(206)Pb/^(204)Pb、^(207)Pb/^(204)Pb、^(208)Pb/^(204)Pb范围分别为18.327~18.510、15.498~15.575、37.977~38.212,不同金属硫化物铅同位素组成变化范围很小,表明来源于同一岩浆源区。在铅构造模式图上,均位于地幔铅与造山带铅之间。乌奴格吐山矿床硫铅同位素数据共同表明其成矿物质来自于深源岩浆。On the basis of mineragraphy study,the ore minerals are analyzed for S and Pb isotopic composition in Wunugetushan Cu-Mo deposit.The S isotopic compositions of metal sulfides are relatively even and homogeneous with the δ^（34）S values ranging from 1‰-3‰,showing the typical characteristics of the magmatic sulfur.The ^（206）Pb/^（204）Pb,^（207）Pb/^（204）Pb,^（208）Pb/^（204）Pb ratios of ore minerals are in the range of 18.327-18.510,15.498-15.575 and 37.977-38.212,respectively.The Pb isotopic compositions of different metal sulfides are in a small range,it indicates that Pb isotope might be derived from the same magmatic origin.Pb isotopic composition is mostly plotted between the mantle and orogenic belt evolution curves in the tectonic model diagram.The sulfur and lead isotopic features of Wunugetushan deposit suggest that the ore-forming materials are mainly derived from the deep magma.

关 键 词：斑岩型铜钼矿 硫铅同位素 成矿物质 乌奴格吐山 内蒙古 

分 类 号：P618.41[天文地球—矿床学] P618.65[天文地球—地质学]