对大方山金矿床主成矿阶段矿石中硫化物的铅、硫同位素地球化学特征进行了研究，结果表明：大方山金矿床主成矿阶段铅同位素变化范围不大，属正常铅。利用计算获得相关特征参数、铅构造模式图及Δβ－Δγ成因相关图解综合分析，认为矿石铅主要来源于地幔，但受到壳源铅不同程度的混染；硫同位素组成变化范围为1．1‰～4．0‰，平均值为2．3‰，与幔源硫的同位素组成比较接近，表明硫主要来源于地幔，有地壳硫的加入。综合分析认为该矿床成矿物质来源于造山过程中壳－幔混合源，以幔源为主。
In this paper ,geochemical characteristics of lead and sulfur isotopes in sulfide ores in the main metallo-genic stage of Dafangshan Gold Deposit are studied .The results show that the variation range of lead isotope in the main metallogenic stage of Dafangshan Gold Deposit is not obvious , indicating normal lead .Comprehensive analysis based on correlated characteristic parameters ,the lead structure model diagram and Δβ-Δγcause related illustration obtained from calculation holds that the lead in ores mainly derived from the mantle ,but was contaminated by shell source lead in different levels;isotopic compositions of sulfur range from 1.1‰to 4.0‰,average 2.3‰,close to the sulfur isotopic compositions of the mantle source , which shows that sulfur mainly derived from the mantle and mixed with crust sulfur .Comprehensive analysis takes that the deposit ore-forming materials come from orogenic process of the mixed crust-mantle source ,mainly the mantle source .
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