In the study of isotopic geochronology of grauitoids in the southern part of Xizang plateau, 103 mica and zircon ages were determined by K-At method and U-Pb me
In this paper a technique for determining ^235U abundance is described. After chemical separation, uranium-rich ore (a compound of uranium with chemical and rad
In accordance with the characteristics of associated minerals, trace elments in the altered rocks around the veins and the composition of wolframite and mica, t