滇西镇康芦子园铅锌矿床断裂构造岩稀土元素地球化学特征及意义

Geochemical characteristics and significance of rare earth elements of fault tectonite of Luziyuan Pb-Zn deposit in Zhenkang of western Yunnan

文章在系统研究矿床地质特征的基础上,对该矿床内不同方向、不同矿化程度的断裂构造岩、地层岩石以及矿石的稀土元素地球化学特征进行了综合对比分析,结果表明:断裂构造岩与地层碳酸盐岩及矿石的稀土元素配分模式均表现为轻稀土富集,δEu亏损显著,δCe异常不明显的右倾型,显示出断裂构造岩、地层岩石、矿石三者间稀土元素特征存在着同源的性质;成矿环境主要是在相对还原的条件下进行;探讨了影响各类岩(矿)石的稀土含量及配分模式变化的因素,从而为今后隐伏矿体的找寻提供一定的指示信息。

Based on the systematic study of geologic characteristics of deposit and comprehensive comparison and analysis on geologic characteristics of rare earth elements (REE)of fault tectonite,strata rocks and ores which occur in different direction and in different mineralization status,it is suggested that REE patterns of fault tectonite,strata rocks and ores are characterized by LREE enrichment,notableδEu loss and rightward inconspicuous δCe anomaly.Hence it shows that the REE characteristics of fault tectonite,strata rocks and ores share the same origin.The metallogenic environment is under the relative reducing condition.This pa-per discusses the factors which affect REE contents and patterns of various rocks (ores),thereby it provides indicative information for prospecting of concealed ore-bodies.