云南会泽金红铅锌矿区赋矿地层及断裂构造岩稀土元素组成特征

REE CHARACTERISTICS OF THE HOST STRATA AND TECTONITE IN THE JINHONG LEAD-ZINC DEPOSIT IN YUNNAN PROVINCE

摘要: 在研究区域地质背景基础上，分析了金红铅锌矿区赋矿地层及控矿断裂构造岩的稀土元素组成特征.按其特征和配分模式得知：赋矿白云岩属于LREE富集-HREE平坦型，轻重稀土分馏程度都较高，Eu异常差异明显，Ce异常差异较大，（La/Yb）_N、（La/Sm）_N和（Gd/Yb）_N值具有一定的差异；断裂构造岩属于LREE富集-HREE平坦型，轻重稀土分馏程度都较高，Eu异常差异微弱，Ce异常差异明显，（La/Yb）_N、（La/Sm）_N和（Gd/Yb）_N值比较相似.以上特征可作为成矿预测的微观标志.

Abstract: With study of regional geological background, the REE compositions of the ore-hosting strata and orecontrolling fault rocks in the Jinhong Pb-Zn deposit are analyzed. The REE distribution patterns and characteristics show that the ore-hosting dolostone belongs to LREE enrichment-HREE flat type, with highly fractionated light and heavy rare earth elements, notable Eu and Ce anomalies, quite different (La/Yb)_N,(La/Sm)_N and (Gd/Yb)_N values. The tectonite is also LREE enrichment-HREE flat type, with high fractionation of LREEs and HREEs, weak Eu anomaly, distinct Ce anomaly, similar(La/Yb)_N, (La/Sm)_N and (Gd/Yb)_N values. The above characteristics are micro-indicators for metallogenic prediction.