我们在文中主要介绍了利用 CD— 3型微机化地面伽玛能谱测量仪在四川盐源县西范坪斑岩型铜矿中寻找有利含矿部位、区分岩性界限的应用效果。阐述了利用地面伽玛能谱测量给出的 U、Th、K含量及其比值等参数信息来解决有关地质问题的方法及手段 ,也为全面评价西范坪铜矿的发展前景提供了一定的依据 In this paper, we mainly introduce the application effect of using CD-3 type computerized ground gamma energy spectrum measuring instrument to find advantageous ore-bearing parts in Xifanping porphyry copper deposit, Yanyuan County, Sichuan Province to distinguish lithologic boundaries. The methods and means of solving the geological problems by using the parameters of U, Th, K and their ratios given by ground gamma spectrometry are also described. It also provides some suggestions for the comprehensive evaluation of the development prospects of Xifanping copper deposit in accordance with