Geochemical characteristics(including major elements,minor elements and chemical speciation of uranium) of a sandstone uranium deposit from Xinjiang and their effects to in-situ leaching of uranium have been analyzed.The active uranium in the chemical speciation of uranium is principal,with low proportion of the inert uranium.Effects of contents of SiO2 and Na2O and LOI(loss on ignition) on uranium concentration of leaching solution are relatively large,but that of the distribution of minor elements are light.Chemical speciation of uranium ...