【摘要】 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。更多还原

【Abstract】 Based on the systemmatic study of the precipitation factes and geochemistry of eight sections in Pinggui, Guangxi, the W and Sn distribution in the transitional bed between Donggangling Formation and Xindu Formation has been explained. The average content of W is 1.64×10￣(-6) and the average content of Sn is 1.4 ×10￣(-6). From the sand flat to the mixed flat-lagoon. and to the groove, the content of W and Sn is on.the increase, whereas the W / Sn is on the decrease. Synthesizing and analysing the distribution of W and Sn in the strata, the ore-bearing property of the granite and the character of the anomaly in the mining area, the author does not consider the transitional bed as a source-bed.更多还原