云南大平掌铜-多金属矿床成矿金属来源初探  

PRELIMINARY STUDY ON ORIGIN OF ORE-FORMING MATERIALS IN DAPINGZHANG COPPER-METALLIC DEPOSIT, YUNNAN PROVINCE

作　　者：钟宏[1] 胡瑞忠[2] 叶造军[2] 

机构地区：[1]中国科学院地质与地球物理研究所岩石圈构造演化开放研究实验室,北京100029 [2]中国科学院地球化学研究所,贵阳550002

出　　处：《地质科学》2001年第1期72-82,共11页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：人事部博士后基金资助

摘　　要：大平掌铜 -多金属矿床是我国西南“三江”地区新发现的火山岩型块状硫化物矿床 ,微量元素、稀土元素及铅同位素地球化学研究表明 ,成矿金属元素主要来源于对流循环的海底热卤水对火山岩围岩的淋滤作用。成矿过程中细碧岩、角斑岩、石英角斑岩均可能提供较多的 Cu、Au,角斑岩、石英角斑岩可能贡献较多的 Pb,而角斑岩则可能提供较多的 Zn。The Dapingzhang copper metallic deposit is volcanic hosted massive sulfide (VHMS) deposit recently found in the Sanjiang region, SW China. The characteristics of trace element, rare earth element and lead isotope geochemistry indicate that the ore forming metals were mostly leached from the volcanic rocks through the convective circulation of hot brine water on seafloor. Furthermore, Cu, Au are possibly mainly derived from the spilite, keratophyre and quartz keratophyre, while Pb mostly came from the keratophyre and quartz keratophyre, and Zn could be provided by the keratophyre. The volcanic rocks and ores characterized by high concentrations of radiogenic lead indicate the same original area.

关 键 词：块状硫化物矿床 成矿金属 火山岩 多金属矿床 地球化学特征 成矿机制 

分 类 号：P618.2[天文地球—矿床学]