长江凌溪地区铀矿化特征及找矿潜力分析

Analysis of uranium mineralization and prospecting potential in Lingxi area of Yangtze River

凌溪地区位于粤北长江矿田东北部,具有良好的成矿地质条件。区内铀矿化类型主要为硅化带型和交点型,多集中于牛尾岭断裂与上甘洞断裂、犁壁岭断裂交汇处。硅化带型铀矿化赋存于SN向、NNW向次级断裂带内,在牛尾岭断裂与上甘洞断裂、犁壁岭断裂交汇处。牛尾岭断裂也显示出以一定的物化探异常,尤其是在土壤氡异常图中更为显著,具有良好的铀成矿潜力。交点型铀矿化点赋存于走向为近NW向(NEE向)辉绿岩脉两侧的断裂构造内,含矿构造走向与辉绿岩一致,具有明显的物化探异常,找矿潜力良好。

Lingxi area is located in the northeastern part of the Yangtze River orefield in northern Guangdong,and has good metallogenic geological conditions.The types of uranium mineralization in the area are mainly silicified belt type and intersection type,and are concentrated in the intersection of Niuweiling fault,Shanggandong fault and Libiling fault.Silicified uranium mineralization occurs in the secondary fault zone of the SN direction and NNW direction,at the junction of the Niuweiling fault and the Shanggandong fault and the Libiling fault.The Niuweiling fault also shows a certain physical and chemical anomaly,especially in the soil radon anomaly map,with good uranium metallogenic potential.The intersection uranium mineralization point occurs in the fault structure which is on both sides of the diabase vein in the near NW direction(NEE direction).The ore-bearing tectonic trend is consistent with the diabase,with obvious physical and chemical anomalies and good prospecting potential.The ore-bearing tectonic trend is consistent with the diabase,with obvious physical and chemical anomalies and good prospecting potential.