中文摘要：

贵州独山巴年锑矿床是华南锑矿带代表性锑矿床之一。矿体赋存于中泥盆统独山组地层之中。本文对该矿床辉锑矿的硫、铅同位素组成进行了系统分析。结果表明,辉锑矿的δ34S值变化范围为-5.4‰～-1.2‰,平均-4.2‰,计算获得成矿流体中总硫的δ34SΣS=0.1‰,显示岩浆来源硫的同位素特征。辉锑矿铅同位素组成变化范围较窄：206Pb/204Pb为18.561～19.156,平均18.813;207Pb/204Pb为15.703～15.769,平均15.734;208Pb/204Pb为38.573～39.207,平均38.906。绝大多数样品中矿石铅为正常铅,具有华南区域性铅同位素组成特征。我们认为巴年锑矿床成矿金属元素锑除主要来源于赋矿围岩泥盆系外,基底地层也可能提供了部分成矿物质。

英文摘要：

The Sulfur and lead isotopic compositions of stibnite from Banian antimony deposit,located in Dushan County,Guizhou Province,one of representative antimony deposits in the South China Sb belt,whose orebodies hosted by the Dushan Formation of the Middle Devonian,were systematically analyzed in this study.The results show that δ34S values of stibnite range from-5.4‰ to-1.2‰ with an average of-4.2‰.The calculated δ34SΣSvalue in ore-forming fluid is-0.1‰,indicating that sulfur of stibnite may be sourced from magma.Lead isotopic compositions vary over a narrow range,with 206Pb/204Pb = 18.561-19.156（averaging 18.813）,207Pb/204Pb = 15.703-15.769（averaging 15.734） and 208Pb/204Pb = 38.573-39.207（averaging 38.906）.The majority of ore lead is normal.Meanwhile,the characteristics of ore lead isotopes of Banian deposit are consistent with that of regional lead from the South China.We conclude that the metal（mainly Sb） of this deposit is dominantly derived from the Devonian host rocks and partly possible derived from the basement strata.