Ore-forming fluid features and metallogenic model of uranium deposits in Zhuguangshan ore field

Based on the analysis of geological backgrounds in Zhuguangshan ore field, this paper discussed the metallogenic character and ore-forming fluid features of the uranium deposits and summarized the metallogenic model. Precambrian basement, Indo-Chinese and Yanshan epoch granite mass which is the uranium sources, were altered and extracted by upper mantle hydrothermal fluid and generated the ore-forming fluid. Mineralization is controlled by Late Mesozoic outstretch structure and deep focus hydrothermal fluid. 3 metallogenetic types were classified in this ore field: crack alteration granite veinlet disseminations type, silicate crack granite vein type and dynamic breccia vein type. (authors)