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
The chemistry of organo-clay in somc Tertiary clay-stones from the northern part of the South China Sea was studied. The preliminary results are summarized as f
Commonly seen in Mesozoic coal fields of Diwa type in Hunan and Jiangxi are basic, intermediate and acidic intrusive and volcanic rocks. The sequence of magmati
Natural asphalts from carbonate rocks in South China have been studied by using microscopy, X-ray diffraction, ESR and C^-, H^- analysis and subjeeted to therma