西峡县太平镇铀稀土矿区放射性元素与稀土矿化之间的关系研究

Study on the Relationship between Radioactive Elements and Rare Earth Mineralization in Rare Earth Mine of Taiping Town, Xixia County

在前期找矿工作中,采用了地面γ总量测量、γ测井等放射性物探工作方法,发现矿区内放射性异常点带与稀土矿化关系密切。通过光薄片、能谱分析、化学分析等方法,对比了探槽和钻孔取样分析结果,研究了常见的三种天然放射性元素与稀土矿化之间的关系,结果表明,在本矿区铀元素总体含量较低与稀土含量呈弱正相关,钍元素含量较高且与稀土含量呈强正相关,钾元素呈弱负相关。部分样品钍元素含量达到了边界品位,是产生放射性的主要因素,进而验证了在矿区内进行的放射性物探工作对寻找稀土矿床的指导作用。

Radioactive geophysical prospecting methods, such as ground gamma-ray measurement and gamma-ray logging, were adopted in the preliminary prospecting work in rare earth mine of Taiping Town, Xixia country.It is found that there is a close relationship between rare earth mineralization and radioactive anomaly.The assay results for driling samples and trenching samples were compared with thin section identification,energy spectrum analysis,chemical analysis and other methods.The relationship between three common natural radioactive elements and rare earth mineralization was studied. The results showed that content of uranium in the area was low and had poor positive correlation with rare earth content,content of thorium was high and had strong positive correlation with rare earth content,and potassium was weakly negatively correlated. The content of thorium in some samples reached boundary grade, and was the main cause of radioactivity. Furthermore, it is verified that the radioactive geophysical exploration in the mining area is a guiding role in the search for rare earth deposits.