On the basis of the batch melting model^*,the author explains the linear relationships between the elements which are often recognized in oceanic basalts,has es
Uranium-bearing hydrothermal solutions during the stage of ore deposition are weakly alkaline and of the Ca^2+ -Na^+/HCO3^- -F^- type.UO2(CO3)2^2- and UO2F4^-,