通过对中泥盆统信都组和东岗岭组过渡层八条剖面系统的沉积相和地球化学研究表明，本区钨、锡含量较低，钨平均为１．６４×１０－６，锡平均为１．４×１０－６，由砂坪→混合坪－泻湖→凹沟，由台地→台盆，钨、锡含量增高，钨／锡比值降低。综合分析地层中的钨锡分布、岩体的合矿性和矿区异常等特征，过渡层不是钨、锡的矿源层。 Based on the sedimentary facies and geochemistry of the eight sections of the transitional layer of the Middle Devonian Xindu Formation and the Donggangling Formation, the tungsten and tin contents in this area are relatively low, with an average of 1.64 × 10-6 tungsten, 1.4 × 10-6, from the sand floor → mixed ping - lagoon → groove, from the table → basin, tungsten, tin content increased, tungsten / tin ratio decreased. Based on the comprehensive analysis of the distribution of tungsten and tin in the stratum, the co-occurrence of the rock mass and the abnormality of the mining area, the transitional layer is not the source layer of tungsten and tin.