黔东南某向斜黑色岩系铀矿化特征与找矿远景

The Geological Characteristics and Prospecting Potential of synclinal-control on Black-shale-series rock-hosted Uranium mineralization in the Southeastern Guizhou province

三穗向斜位于贵州省黔东南州,赋矿地层为寒武系下统牛蹄塘组,为黑色薄层硅质岩夹黑色炭质粉砂岩,矿体产出严格受地层控制,含矿层位稳定,矿体厚度和品位变化不大。铀矿化主要分布在向斜的两翼,呈北东向展布,铀与Al2O3、LOI、CaO、MgO呈明显的正相关关系,而与SiO2、FeO、MnO为负相关。通过勘查表明,铀矿(化)体沿走向和倾向均具有较好的延伸,该地区具有较好的找矿前景。

Uranium mineralization is hosted in black thin layer siliceous rocks interbedded black carbonaceous siltstone of the Lower Cambrian black--shale--series which is called Niutitang Formation, the mineralization is controlled by the strata lithology, and the thickness and grade of Uranium mineralization is relatively stable. The Uranium anomalies is mainly located at the limbs of syncline with NE trending. The Uranium shows positive correlation with A12Oa, LOI, CaO, MgO, but negative correlation with SiO2,FeO, MnO. The Uranium mineralization along strike and dip has a big extension via exploration, which indicates that the region has great potential for prospecting.