彩霞山铅锌矿原生晕地球化学特征及深部矿产评价

Primary Halos Characteristics of Caixiashan Pb-Zn Deposit and Prediction for Deep Mineralization

彩霞山铅锌矿是位于哈萨克斯坦—准噶尔板块南缘的热液型铅锌矿床。对其Ⅱ号矿体36号勘探线剖面的原生晕特征研究表明:1)矿体前缘晕元素为Cd、Hg、Zn、As、Cu,近矿元素为Ag、Pb、Sb,尾晕元素为Sn、Mo、W;2)根据格里戈良分带指数法计算,其原生晕轴向分带序列(由矿体头部至尾部)为Zn-Mo-Hg-Cd-Cu-As-Ag-Sb-Sn-W-Pb。采用相关分析、聚类分析和因子分析方法研究了成矿元素与相关金属元素、主量元素之间的亲缘性,并建立了(Cd+Hg)/(W+Mo)、F1因子以及主量元素Fe2O3、Na2O和Na2O/K2O等评价指标。根据各评价指标的分布特征,认为在矿体深部仍有良好的找矿前景。

Caixiashan hydrothermal Pb-Zn deposit is located at the south margin of Hazakstan-Jungar plate.The study of the primary geochemical halos of No.36 section in No.Ⅱ ore body shows that： 1）Cd,Hg,Zn,As,Cu are front elements.Ag,Pb,Sb are proximal elements while Sn,Mo W are tail elements of the ore body.2）The axial zonation of the elements delineated by zonation indexes is as follows： Zn-Mo-Hg-Cd-Cu-As-Ag-Sb-Sn-W-Pb.Multivariable statistical methods such as correlation analysis,cluster analysis and factor analysis were used to study the relationship among the ore-forming elements,associated elements and major elements and the corresponding evaluation criteria such as（Cd＋Hg）/（W＋Mo）,F1 factor,Fe2O3,Na2O,and Na2O/K2O were built.The distribution of the criteria shows that the mineralization is prospective in the deep portion of the ore body under study.