关键词: 铀铌铅矿, 工艺矿物学, 结构构造, 嵌布粒度, 赋存状态

Abstract: Huayangchuan U-Nb-Pb polymetallic deposit of Shaanxi Province belongs to large mineral deposit with properties of large volume mineral，variety types of minerals，and it is exploitable.In order to provide technique basis on mineral processing technology，systematic studies on technological mineralogy of typical ores have been carried out.The conclusions have been reached as follows:①main valuable minerals include betafite，galena，follows by monazite，allanite，magnetite，barite-celestite and zircon.②88.03% of UO2 occurred in the betafite ore，and the rest of UO2 occurred in monazite，allanite，apatite，sphene by forms of isomorphism or adsorption.95.22% of Nb2O5 occurred in the betafite ore，the rest occurred in allanite，apatite and sphene in forms of isomorphism or adsorption.89.00% of Pb occurred in the galena ore，the rest of Pb mainly occurred in cerussite.③The textures of ores are mainly automorphic-hypautomorpuic granular texture，including texture，parcel structure，zonal texture，dissolution texture，mosaic texture and metasomatic texture.Structures of ores are mainly thin veins structure，veinlet structure，disseminated structure，and spot-like structure.④Automorphic-hypautomorpuic granular betafites with granularity from 0.15 to 1.5 mm intruded into the fractures of calcite and plagioclase with occurring of allanite and apatite.Betafite.Automorphic-hypautomorpuic granular galena with granularity from 0.3 to 1.2 mm occurred in calcite and plagioclase.Allanite，monazite，apatite with different grain sizes usually present at same place in the fractures of gangue minerals.The proposed process of stage grinding stage separation is recommended for significant difference of ores minerals grain sizes.

Key words: U-Nb-Pb polymetallic ore, Process mineralogy, Structure-texture, Dissemination size, Occurrence