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芦子园铅锌矿床位于“三江成矿带”南段保山-镇康地块,矿体赋存于上寒武统沙河厂组第二、三段(∈3s2,∈3s3)中的一套碳酸盐岩系中,矿体呈似层状、透镜状、脉状,严格受构造控制,矿体及其周围发育大量的矽卡岩矿物。矿区大理岩和矿石的稀土元素配分模式为轻稀土元素相对富集,具有中等Eu亏损异常及无明显的Ce异常;矽卡岩的稀土元素配分模式可分为两类:一类为中等Eu亏损异常;另一类为无明显Eu异常或较弱的Eu正异常。大理岩、矽卡岩和矿石具有相似的REE配分模式,均为轻稀土元素相对富集型,具有一定的负Eu异常及无明显Ce异常,向右倾斜,通过各类岩(矿)石稀土元素特征分析,并结合矿床地质特征,认为成矿作用主要是在相对还原的环境下进行,其成矿物质来源于深部热液,可能部分来源于赋矿地层(∈3s2,∈3s3)。研究认为,该矿床为赋存于碳酸盐岩地层中明显受构造控制的热液充填交代矽卡岩型铅锌矿床。
The LuziYuan lead-zinc deposit is located in the Baoshan-Zhenkang block in the southern part of the “Sanjiang metallogenic belt”, and the orebodies occur in the second and third segments of the Upper Cambrian Shahechang Formation (∈3s2 and ∈3s3) In a series of carbonate rocks, the ore bodies are stratified, lenticular and vein-shaped, and are strictly controlled by structure. Large amounts of skarn minerals are developed in and around the ore body. The REE distribution patterns of marble and ore in the mining area are relatively enriched in light rare earth elements, with moderate Eu depletion anomaly and no obvious Ce anomaly. REE patterns of skarn can be divided into two types: one is moderate Eu loss Abnormalities; the other is Eu positive anomaly with no obvious Eu anomaly or weakness. The REE distribution patterns of marble, skarn and ore are similar, all of them are relatively LREE-rich, with a certain negative Eu anomaly and no obvious Ce anomaly, inclined to the right, through various types of rock (ore) According to the analysis of the elemental features and the geological characteristics of the deposit, it is considered that the metallogenesis is mainly carried out in a relatively reduced environment. The metallogenic material is derived from deep hydrothermal fluids and may be partly derived from ore-bearing strata (∈3s2, ∈3s3). According to the study, the deposit is hydrothermal-filled skarn-type lead-zinc deposit that is obviously controlled by tectonics in the carbonate rocks.