伊犁盆地蒙其古尔铀矿床后生蚀变及铀矿物组成研究

摘要

Based on geological survey, core observation and documentation, combining observation under microscope and eleclTon microprobe analysis, epigenetic alterations has been developed in Mengqiguer uranium deposit, the alteration includes I/monition, kaolinization, hydromicazation, sericitization, chlorite, carbonatation, pyritization. The uranium minerals of ore arc pitchblende and coffinite. Uranium mineral arc shape of lumps, granular or fine veins and granular, lumpy, and berry-like pyrite, charcoal, quartz, feldspar and other close quarters. These features suggest that the deposit of industrial uranium mineralization and the role of epigenetic alteration arc close.%通过野外详细地质调查、钻孔观察、岩芯编录等方法，结合室内显微镜下观察和电子探针分析显示：蒙其古尔铀矿床发育有褐铁矿化、高岭石化、水云母一绢云母化、绿泥石化、碳酸盐化和黄铁矿化等后生蚀变作用；矿石的铀矿物主要为沥青铀矿和铀石，铀矿物呈团块状、粒状或细脉状与分散的星点状或莓状的黄铁矿、炭屑、石英、长石等紧密共生。这些特征表明，该矿床的工业铀矿化与后生蚀变作用关系密切。