鹿井矿田铀成矿地质特征及找矿潜力分析

Analysis on geological characteristics of uranium metallization and prospecting potential in Lujing orefield

对鹿井矿田以往的勘查成果进行了系统梳理,认为鹿井矿田是构造-岩浆作用导致的铀成矿物质汇聚区,燕山晚期岩浆热液及基性脉体热液促成了汇聚区内成矿物质的再迁移及成矿作用的发生;矿田内现有矿床的空间分布特征是剥蚀作用的结果;控矿因素本质上是地球化学障;铀成矿壳层分析表明矿田仍具较大的找矿潜力,现有矿床的近外围地区、以酸性矿石为主的矿床深部及红层覆盖区均值得开展新一轮勘查工作。

The exploration results in the past are systematically analyzed in this paper and it is believed that Lujing orefield is an accumulative area for uranium metallogenic materials controlled by tectono-magmatism.Hydrothermal solution from Late Yanshanian magma and basic dikes resulted in the Remigration of metallogenic materials in the accumulative area and uranium mineralization.Spatial distribution characteristics of deposits in the orefield are the outcome of denudation.Ore-controlling factors are basically geochemical barrier.Analysis of uranium metallogenic lithospheric layer shows that there are more prospecting potential in the orefield.A new round of exploration can be conducted in the periphery of the deposits,in the depth beneath deposits of acidic ore,and in area covered by red beds.