四川北川县沟系沉积物测量地球化学特征及找矿

Ditch Sediment Geochemical Survey and Prospecting in Beichuan, Sichuan

北川县金凤桥一带是金矿的有利成矿区域。对该区域3265件沟系沉积物测量结果进行R型聚类分析、因子分析。结果显示:工作区内Cu、Pb、Zn元素有较高的浓集克拉克值,其形成可能与区域内微弱的中温热液活动有关;Au、Ag、As、Sb、Hg、Cu、Pb、Zn元素成矿联系较弱,仅可能存在空间上的伴生,而不是共生关系;与金矿化关系比较密切元素组合为As、Sb,但金元素在因子分析中贡献率低,说明区内金矿化主要以小规模的矿点形式出现。

R-type cluster analysis and factor analysis of ditch sediment geochemical data in the Jinfengqiao area, Beichuan, Sichuan are carried out. The results indicate that concentration Clarkes of Cu, Pb, Zn elements are higher which is related to weak mesothermal activity. As and Sb anomalies are related to Au mineralization.