昆阳群因民组铜矿床的成矿地球化学  

THE GEOCIIEMISTRY OF METALLOGENESIS OF THE CU DEPOSIT IN YINMING FORMATION OF KUNYANG GROUP

作　　者：李志群 

机构地区：[1]西南有色地质勘查局地质研究所

出　　处：《云南地质》1996年第2期230-237,共8页Yunnan Geology

摘　　要：因民组是昆阳群中的重要赋矿层位之一。常量元素、微量元素、稀土元素、包裹体和同位素研究表明，因民期的成矿方式为火山热水喷流—沉积成矿。成矿环境为半深水一深水局限盆地，成矿背景是以“洋盆化”为特征的裂谷作用。成矿作用是在地台不够稳定，裂陷不够强烈的条件下发生的，成矿物质以壳源为主，扩张深切作用控制着矿质的活化和运移，沉积条件决定了矿质的空间定位。The Yinming Formation is one of the most important ore-bearing horizon. The study of normal,trace,RE elements,inclusions and isotopes shows that the Yinming metallogenetic model is of a volcanic hydrothermal effusion-deposition metallogenesis. The metallogenetic environment is a closed bathyal-abysmal basin and the metallogenetic setting is a rifting with characteristics of 'ocean basin evolution'.This metallogenesis takes place under conditions of the platform unstable and the rifting not very intensive.The metallogenetic material is mainly crust-derived, expansion and deeply cutting control the activization and transportation of ore material and the depositional conditions determine the emplacement of ore material in space.

关 键 词：铜矿床 成矿 地球化学 因民组 昆阳群 

分 类 号：P618.410.5[天文地球—矿床学]