辽宁宽甸万宝源斑岩型钼矿微量元素地球化学特征

摘要

With the prospecting breakthrough in recent years, the Wanbaoyuan porphyry molybdenum deposit in Liaoning Province enlarges from small-size to middle-size, becoming the most important Mo production base. Trace element geochemical data are analyzed for granodiorite, quartz porphyry, diorite porphyrite, skarn and marble. Five element groups are divided in virtue of R-mode cluster analysis: 1 ) Au-Bi-Cu; 2) Pb-As-Sn-Sb-Ag; 3 ) Co-Ni-Mn-Cr; 4) Mo-W; and 5 ) Zn-Hg. The division is verified also by factor analysis. Based on the characteristics of geology and deposit, the ore elements of Au and Cu enrich in skarn, while Mo enrich in granodiorite and quartz porphyry.The element groups of Au-Bi-Cu and Mo-W can be used as directors for the exploration of such deposits.%宽甸万宝源斑岩型钼矿近年找矿工作取得了突破,已由小型矿山转化为中型矿山,成为辽东地区最主要的钼矿生产基地.通过对花岗闪长岩、石英斑岩、闪长玢岩、夕卡岩和大理岩的微量元素地球化学特征分析,将其按照相关富集程度通过R型聚类分析划分为5类:①Au、Bi、Cu;②Pb、As、Sn、Sb、Ag;③Co、Ni、Mn、Cr;④Mo、W;⑤Zn、Hg.因子分析也验证了以上分类的正确性.结合区域地质及矿床特征,夕卡岩中富集Au、Cu成矿元素,花岗闪长岩和石英斑岩富集Mo成矿元素,①④分类可作为寻找这些矿产资源的地球化学证据.