摘要
对胶东招平断裂上的山后金矿34个钻孔进行了原生晕测量,分析了Au、Ag、Cu、Pb、Zn、As、Sb、Bi、Mo、Hg等10种元素,统计了胶东岩群、荆山群、玲珑花岗岩及招平断裂蚀变带中微量元素含量及变化。变质岩、花岗岩均富Bi、Ag,而贫Hg、Sb、Au、Cu、Zn、As;胶东岩群、荆山群中金的丰度值相近,它们均为金矿的矿源岩;在招平断裂蚀变带中Au、Ag、Pb、Mo、Bi等元素出现了明显富集,而Cu、Zn、Sb、Hg等元素没有富集,矿床多金属硫化物阶段不发育;根据聚类分析结果,Au与Ag、Cu、Pb、Zn生成于不同的成矿期,招平断裂中的Au矿体形成于金成矿期,招平断裂上盘荆山群地层中的Au、Ag、Cu、Pb、Zn多金属矿体形成于金银多金属成矿期;招平断裂北段的成矿条件要比南段好;根据As、Mo元素含量的变化,确定出山后金矿深部矿体预测的简单准则,并对金矿深部进行了简单成矿预测。
Primary halo investigation of 34 drill holes has been carried out in the Shanhou gold deposit which hosted in Zhaopin＇g fault zone, Jiaodong Peninsular. Au, Ag, Cu, Pb, Zn, As, Sb, Bi, Mo and Hg elements were analyzed. Statistics of trace elements contents and varitations of Jiaodong group, Jingshan group, Linglong granites and altered rocks in the Zhaoping fault zone show that metamorphic reeks and granites are rieh in Bi and Ag while poor in Hg, Sb, Au, Cu, Zn and As. Gold contents in the Jiaodong group and Jingshan group are close with each other and they are all source reeks of gold mineralization. In altered rocks of Zhaoping fault zone, Au, Ag, Pb, Mo and Bi were enriched significantly while Cu, Zn, Sb and Hg were not remarkably enriched. Therefore, the multi - sulfides phase of mineralization was not well developed in the mineralization region. According to cluster analysis of the trace elements, enrichment of Au and other elements like Ag, Cu, Pb and Zn were not formed in a same mineralization period. Au ore bodies in the Zbaoping fault zone were formed during the gold mineralization period while the ore bodies characterized by Au, Ag, Cu, Pb and Zn in the hanging wall （ Jingshan group） were formed during the of gold and multi - metals mineralization period. Moreover, the northern parts of the Zhaoping fault zone are benefit for gold mineralization than that of the southern parts. Based on the variation features of As and Mo elements, a simple ore prospecting principle was established and applied in the estimation of ore resources in the Shanhou gold deposit.
出处
《地质与勘探》
CAS
CSCD
北大核心
2008年第5期23-29,共7页
Geology and Exploration
基金
武警黄金指挥部项目(编号:HJ04-02)资助
关键词
微量元素
丰度
山后金矿
胶东
trace elements, abundance, Shanhou gold deposit, Jiaodong Peninsular
