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ZHANG Chengjiang, CHEN Youliang, LI Juchu, XU Zhengqi, YAO Jian. 2015: The discovery of coarse-grained uraninite in Kangdian Axis and its geological significance. Geological Bulletin of China, 34(12): 2219-2226. DOI: 10.12097/gbc.20151208
Citation: ZHANG Chengjiang, CHEN Youliang, LI Juchu, XU Zhengqi, YAO Jian. 2015: The discovery of coarse-grained uraninite in Kangdian Axis and its geological significance. Geological Bulletin of China, 34(12): 2219-2226. DOI: 10.12097/gbc.20151208
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The discovery of coarse-grained uraninite in Kangdian Axis and its geological significance

  • Chengdu University of Technology, Chengdu 610059, Sichuan, China;2. No. 280 Institute of Nuclear Industry, Guanghan 618300, Sichuan, China

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  • The uraninite-bearing quartz veins from Haitain area of Miyi County along Kangdian Axis occur in the Wumaqing Formation consisting mainly of Late Proterozoic biotite-plagioclase schist, which was subjected to migmatization and controlled by ductile-brittle fault zone. Uraninite exhibits black and euhedral crystals composed of combination of cubes and octahedra as well as minor rhombic dodecahedra and cubes, with semi-metallic luster, from 0.5cm to 1cm in size. Mineral assemblage of uranium mineralization includes mainly quartz, uraninite, sphene and molybdenite. Researches show that uraninite formed in a high temperature and pressure geological environment in deep crust, derived from high temperature, acidic and reducing ore fluids. This discovery implies that Panxi area has especially favorable conditions for medium-high temperature hydrothermal vein-type uranium mineralization controlled by ductile-brittle faults in the migmatization region.
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