楚雄盆地郝家河砂岩型铜矿床断裂构造岩稀土元素地球化学特征——以Ⅲ号矿体群为例  

REE geochemical characteristics of fault tectonite in Haojiahe Cu deposit in Chuxiong basin,Yunnan——A case study of No.III ore body group

作　　者：梁徐文[1,2] 韩润生[1,2] 吴海枝[1,2] 吴鹏[1,2] 

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]有色金属矿产地质调查中心西南地质调查所,昆明650093

出　　处：《矿产与地质》2013年第3期226-233,共8页Mineral Resources and Geology

基　　金：教育部博导基金项目(20115314110010);国土资源部危机矿山专项(20089943);云南省矿产预测评价工程实验室及省创新团队

摘　　要：郝家河铜矿床是楚雄盆地砂岩型矿床的典型代表之一。本文以Ⅲ号矿体群为例,在系统研究矿床地质特征的基础上,对不同方向、不同矿化程度的断裂构造岩、矿石、地层岩石进行稀土元素特征对比分析,结果表明:断裂构造岩与矿石、地层岩石表现出轻稀土元素富集,δEu弱亏损,δCe负异常不明显,轻稀土富集的右倾配分模式,显示出构造岩与矿石、地层岩石稀土元素特征具有同源特征;讨论了各类岩矿石稀土元素地球化学特征,分析影响构造岩稀土含量及配分模式的因素,进而提出稀土元素地球化学找矿标志,为隐伏矿预测提供重要的地球化学信息。Haojiahe Cu deposit is one of the typical sandstone type deposits in Chuxiong basin.In the case study of No.III ore body group,the systematic research on the geological characteristics of the deposit and the REE characteristic comparison among fault tectonites,ores and formation rocks which characterized by different direction and different degree of mineralization reveal that： LREE concentration,weak negative δEu,δCe negative anomaly and the right oblique distribution pattern of LREE concentration are found in fault tectonites,ores and formation rocks.It shows that the REE characteristics of tectonites,ores and formation rocks have the same source.REE geochemical characteristics of various rocks and ores are discussed and factors which affect rare earth content of tectonites and its distribution pattern are also analyzed.REE geochemical clues for prospection are proposed in the paper and it provides important geochemical information for prediction of hidden ores.

关 键 词：稀土元素 断裂构造岩 Ⅲ号矿体群 郝家河铜矿床 楚雄盆地 

分 类 号：P611[天文地球—矿床学]