湖南沃溪金锑钨矿床中成矿物质来源的硫同位素地球化学证据  

The evidences of sulfur isotope geochemistry for the source of metallogenic substance in the Woxi Au-Sb-W deposit

作　　者：张沛 唐攀科[1] 陈爱清 ZHANG Pei;Tang Pan-ke;CHEN Ai-qing(China Non-ferrous metals Resource Geological Surver,Beijing 100012;Guangzhou Marine Geological Survey,Guangzhou 510075)

机构地区：[1]有色金属矿产地质调查中心,北京100012 [2]广州海洋地质调查局,广州510075

出　　处：《矿产勘查》2019年第3期530-536,共7页Mineral Exploration

基　　金：全国危机矿山接替资源找矿资助项目(编号:20109901)资助

摘　　要：沃溪AuSbW矿床是湖南湘西前寒武纪地层中最具有代表性的金矿床之一,位于扬子准地台江南地轴南缘的雪峰弧形构造隆起带的中段。矿石以石英-金-硫化物型为主,与金共存的矿石矿物为辉锑矿、黑钨矿、白钨矿、黄铁矿等。文章对沃溪矿床深部矿段中辉锑矿和黄铁矿的硫同位素地球化学进行了研究,结果表明:黄铁矿的δ^(34)S变化范围-4. 05‰～0.42‰,极差4. 47‰,平均值-1. 54‰;辉锑矿的δ^(34)S变化范围-4. 99‰～-1. 52‰,极差3. 47‰,平均值-2. 87‰。δ^(34)S变化范围小,说明其来源的均一性,同时与赋矿的马底驿组富硫围岩的δ^(34)S很相近,表明硫来源于赋矿地层。同时,δ^(34)S具有从浅部向深部增大的趋势。The Woxi Au-Sb-W deposit ,situated in the central sector of Xuefeng arc-structural mole track located on the southern margin of Jiangnan Earth axis in Yangtze Para platform,is one of the most representative gold deposits in Precambrian stratum of western Hunan province.Ores are mainly quartz-gold-sulfide.Minerals coexisting with gold are stibnite,wolframite,scheelite and pyrite ect..Studies on the sulfur isotope geochemistry of pyrite and stibnite in the Woxi deep mines,show that the δ^34S of pyrite varies from -4.05‰ to 0.42‰,range4.47‰,with an average of -1.54‰ and that the δ^34S of stibnite varies from-4.99‰ to -1.52‰,range3.47‰,with an average of -2.87‰.The centralized distribution of δ^34S, showing the uniformity of its source,very close to the δ^34S of sulfur-rich wall rock of the Ma di yi formation ,indicates that the sulfur deriveds from the stratigraphic ,with δ^34S increaseing from shallow to deep.

关 键 词：硫同位素 Au-Sb-W矿床 地球化学 黄铁矿 辉锑矿 

分 类 号：P618.51[天文地球—矿床学] P618.66[天文地球—地质学]