扬子型铜矿床矿物稀土元素地球化学

本文较系统研究了扬子型铜矿床中有代表性的菱铁矿、胶黄铁矿、黄铁矿、磁黄铁矿、磁铁矿、黄铜矿及部分脉石矿物的稀土元素组成及特征，总结了展状矿石中和矽卡岩矿石中矿物稀土元素组成的特点及二者之间存在的明显差别，从一个方面探索扬子型铜矿床的成因。

THE REE GEOCHEMISTRY OF MINERALS IN YANGTZE TYPE COPPER DEPOSITS,EASTERN CHINA

To explain the origin Of Yangtze type copper deposits, the authors systematically anaLysedthe REE content and the distributing characteristics in some typical minerals such as siderite,melnkovite, pyrite, pyrrhotite, magnetite, chalcopyrite and some gangue minerais' the resultsshow that sulfide is not a good host of REE, and the contents of REE in sulfide are lower andvary widerly. But there are somewhat similarity in the composition of REE between the samekind of minerals which belong to the same genetical type. There are some similar characteris-tics in the composition of REE between different kinds of minerals which are genetically relat-ed. The difference is significant in the composition of REE between the same kind of mineraiswhich are genetically differentl.The contents of REE in different minerals in the strati form cupriferous pyrite ore -bodiesis variable, but the chondrite-normalized patterns are very alike,indicating these minerals de-posited in a single environment. The hydrothermal metamorphism can make a change of thecontent of REE, but the patterns are remained. The patterns of REE in the skarn minerals aremore resembling each. other and apparently different to those in the stratiform cupriferouspyrite ore bodies, reflecting that the post-igneous hydrothermal fluid is stable during the depo-sition of skarn minera1s and that the stratiform cupriferous pyrite orebodies and the skarn ore-bodies deposited from different fluids.