中文摘要：

沽源460矿床为典型的火山岩型铀钼多金属矿床，矿石类型复杂。系统采集了460矿床的钻孔岩芯样品，通过岩矿鉴定，电子探针、扫描电镜及径迹蚀刻，分析研究其矿化蚀变类型及特征、矿石矿物组合及铀矿物存在形式的研究。查明了460矿床的矿化蚀变类型主要为；伊利石化硅化、萤石化、赤铁矿化、黄铁矿化、闪辞矿化、胶硫钼矿化；铀的存在形式为：以独立的铀矿物形式存在于沥青铀矿和铀石中；以类质同相的形式存在于胶硫钼矿中；以吸附状态存在于基质、裂隙及铀钼矿物的边缘。上述研究成果为460矿床铀钼资源的进一步的开采和利用提供技术支撑。

英文摘要：

Guyuan 460 deposit is a typical volcanic type polymetallic uranium-molybdenum deposit, with complex ore types. Systematically collecting a series of drilling core samples in 460 deposit, through the methods of rock mineral identification, electron microprobe, scanning electron microscope and the track etch, it analyzes the alter- ation types and characteristics, the ore mineral assemblage and the uranium existing forms. The mineralization al- teration types in 460 deposit are mainly： illitization, silicification, fluoritization, hematite mineralization, pyritiza- tion, sphaleritization and jordisitization; The uranium existing forms are mainly： existing independently as pitch- blende and coffinite; existing as isomorphism in jordisite; existing as adsorption state in the matrix, fractures and the edge of uranium molybdenum minerals. All the above research results would provide technical support for fur- ther exploitation and utilization of uranium molybdenum resources in 460 deposit.