[en] Volcanic uranium deposits are often related to acid to intermediate volcanic rocks. However, uranium mineralization in uranium district No. 6710 is closely related to bimodal volcanic rocks and basement granites in space. Studies show that the Rb-Sr isochron age of basalt from the bimodal volcanic rocks is 173 +- 9.7 Ma, and the Rb-Sr isochron age of rhyolite is 164.8 +- 0.57 Ma. The geochemical characteristics of incompatible elements of the former are quite similar to those of the intra-plate tholeiitic-basalt. Those of the latter are metaluminous (ACNK = 0.88 - 0.96) and characterized by high REE {ΣREE = (250.33-295.99) x 10^-6} and HFSE (Y, Zr, Nb etc.). These characteristics are quite similar to those of A-type granites. The Rb-Sr isochron age of the basement granites is 249.9 +- 5.5 Ma. The basement granites are peraluminous (ACNK = 1.18 - 1.26) and characterized by high LREE {(La/Lu)_N = 28.51 - 55.09} and LILE (Rb, Th, U etc.). These characteristics are similar to those of syn-orogenic S-type granite. The bimodal volcanic rocks suggest the starting of the crustal rifting in the period of Early Yanshanian, and the basement granites are associated with the compressive orogenic environment in Late Hercynian. Both of them offered the mineralizer (CO₃^2-) and the uranium source respectively for uranium mineralization in this district