Abstract: The uranium content has positive correlations with the abundance of SiO2, CaO, Fe2O3, LOI and HREEs and Na is almost
depleted at the mineralization and alteration positions of a drill core in the Shazijiang uranium ore-deposit. In trace element spider
diagram and REEs distribution pattern diagram, the shapes of different mineralized and altered belt samples are very similar. The
REEs distribution pattern shows that LREEs are enriched and the distribution lines are lean to right. Compared with the fresh
surrounding rocks, the altered surrounding rocks have elevated Sb and U concentrations and a few more Ni and W concentrations.
Compared with the fresh surrounding rocks and altered surrounding rocks, the cataclastic granites (ore) have significantly increased Cd
and Sb concentrations, while W, Ni and Pb concentrations increase slightly, and Be and Bi concentrations reduce sharply. Compared with
the fresh surrounding rocks, cataclastic granites (ore) and the altered surrounding rocks are characterized by significantly increased Sb
and U concentrations and Sb, Cd and U concentrations, respectively. In addition, both W and Ni increase slightly. Research of element
migration in mineralization and alteration belts shows that Sb, LOI, CaO, Ni, Cu, In and Sr moved in, of which Sb has the largest positivemobility value. In contrast, Na2O, FeO, Be, Cs, Th and Nb all moved out, of which Na2O has the largest negative mobility value. Based on
the results and discussion of geochemistry and element migration, we deduce that the granitic surrounding rocks are one of the most
important sources of uranium and other components, and the ore-forming fluid is alkaline with high oxygen fugacity.

Key words: Shazijiang uranium ore-deposit, mineralization and alteration, geochemistry, mechanism of mineralization