应用聚类和因子分析讨论猫岭金矿元素组合特征

猫岭金矿是一低品位、大型热液型金矿床。金矿体主要以脉状、似层状、透镜状产于下元古界辽河群盖县组二段的千枚岩中,受北北东向片理化带及低序次构造裂隙所控制。矿床原生晕样品的 R 型聚类分析和因子分析的结果表明,与金矿化关系最密切的元素为 Pb、Ag,其次为 As。即 Au、Pb、Ag 代表了主成矿阶段矿化元素组合特征,而 As 和 Co、Ni 元素组合分别反映了与 Au 矿化具成因联系的毒砂和磁黄铁矿化特点。(Au、Pb、Ag)因子与(As、Ag)因子紧密相关,与宏观上所见矿化阶段生成的矿物(自然金、方铅矿等)沿毒砂裂隙分布的特点相吻合,从而说明这两个因子的元素组合代表了最佳成矿地段的元素组合特征。

A DISCUSSION ON THE CHARACTERISTICS OF ELEMENT ASSOCIATION FROM MAOLING GOLD DEPOSIT BY CLUSTER AND FACTOR ANALYSIS

Maoling gold deposit is low-tenor, large-scale hydrothermal type. The gold orebody exists in phyllite, the second member of Gaixian Formation, Liaohe Group, lowerProterozoic Erathem, mainly in the form of vein, layer and lens, controlled by NNEschistosity belt and low order, secondary structure fissure.The result of R-type cluster analysis and factor analysis shows that Pb and Agare the most close with gold mineralization, secondly, As.So Au, Pb,Ag representthe character of mineralizd element association on major metallogenic stage,but Asand Co, Ni element association show respectively the character which arsenopyriteand pyrrhotite have genesis relationship with gold mineralization.(Au, Pb, Ag) factorhas a direct bearing on (As, Ag) factor, it is identical with the fact that minerals(native gold, galena, etc.) formed during mineralization stage distribute along arseno-pyrite fissure. So the element associations of the two factors represent the characterof element association of optimum metallogenic sector.