胶东乳山金矿区原生晕地球化学特征及深部成矿预测

英格庄金矿以相对富As、Co、Ni而三甲和铜锡山金矿则以相对富Cu、Pb、Zn、Ag为特征.聚类分析显示,英格庄金矿具Bi+Hg、As+Sb+Co与Pb+Zn组合,三甲金矿具Bi+Hg+As+Sb+Co、Pb+Zn与Ag+Cu+Au组合,而铜锡山金矿则显示Bi+Hg+Sb+Pb+Ag、Cu+Au+Zn+As及Mo+Ni组合.结合Ni、Co、Mo与Ag、Hg、As、Sb等的相关特征,认为上述三个金矿均有成矿头尾晕叠加现象.Au、Ag、Cu、Pb、Zn、As、Sb、Bi、Hg、Mo等元素垂向变化规律显示,英格庄金矿在-200m标高以下、三甲金矿在-500m标高以下尚有成矿富集段存在.其中,所确定的英格庄金矿的靶位在16勘探线附近,三甲金矿的靶位则在16～20勘探线间.

A CASE STUDY OF THE GOLD VEINING HALO AND PROSPECT LOCATING IN THE RUSHAN GOLD FIELD,JIAODONG PENINSULA, EASTERN CHINA

The geochemical signature of the Yinggezhuang gold deposit is marked by As Co Ni while that of the Sanjia and Tongxishan gold deposits by Cu Pb Zn Ag. Cluster analyses show a Bi Hg, As Sb Co and Pb Zn association for the Yinggezhuang gold deposit, a Bi Hg As Sb Co, Pb Zn and Ag Cu Au one for Sanjia and a Bi Hg Sb Pb Ag, Cu Au Zn As and Mo Ni one for Tongxishan. The aforementioned associations are interpreted as an indicator of the gold veining overlap at depth in the light of the correlation coefficients of two group elements: Ni, Co, Mo and Ag, Hg, As, Sb. Potential orebodies below the altitude of -200 m for Yinggezhuang and below -500 m for Sanjia are further suggested by the vertical variation patterns of some elements like Au, Ag, Cu, Pb, Zn, As, Sb, Bi, Hg and Mo. The specific target for Yinggezhuang is around exploration Line 16 and that for Sanjia between lines 16 and 20.