华阳川铀铌铅矿床是我国近年来探明的一个超大型铀铌铅矿床，该矿床矿石类型独特，主要成矿元素为铀、铌、铅，其中铀与铌呈正相关，而铀与铅不相关，在空间上铀铌矿脉与铅矿脉既共生又有分异。该矿床成矿具有多期多阶段特征：成矿前期为伟晶岩期，对应的脉体主要为钾化的伟晶岩脉，其中含有少量的铌钛铀矿与沥青铀矿，部分脉体铀铌达到工业品位；主成矿期为碳酸岩期，碳酸岩期早阶段对应的脉体主要为含霓辉石方解石石英脉和含黑云母及少量霓辉石的重晶石石英方解石脉，该阶段是铀和铌的主要成矿阶段；而碳酸岩期晚阶段对应的脉体为含沸石石英方解石脉，该阶段是铅的主要成矿阶段。本项目主要研究不同成矿阶段不同矿脉的矿物流体包裹体特征，查明华阳川铀铌铅矿床成矿物理化学条件、成矿流体的性质及来源、确定成矿时代，探讨成矿流体演化及成矿元素共生分异机制。

Huayangchuan U-Nb-Pb deposit is proved to be a super-larger U-Nb-Pb deposit in China in recent years. Ore types of this deposit are unique. The uranium, niobium and lead are the major ore-forming elements. The uranium is positively correlated with niobium, but uncorrelated with lead. Uranium- niobium veins and lead veins are both symbiotic and differentiated in space. The whole deposit experienced multiphase and multistage mineralizations. The pegmatitic stage is early stage of the mineralization, during which pegmatite veins with potassic alteration formed. A small number of blomstrandite and pitchblende are found in these veins. The grades of uranium and niobium reach the industrial grade in part of pegmatite veins. The carbonatite stage is the principle metallogenic epoch. During early carbonatite stage, the aegirine augite-calcite-quartz veins and barite-quartz-calcite veins with biotite and minor aegirine augite formed. This is the main mineralization stage for the uranium and niobium. During late carbonatite stage, the zeolite-quartz-calcite veins formed, which is the main mineralization stage for the lead. We propose an integrated study on the characters of fluid inclusions of various minerals formed during different mineralization stages and located in different veins. Special efforts will be put into understanding the ore-forming physiochemical condition, characters, sources and evolution of the ore-forming fluid, mineralization ages and the mechanism of elemental paragenesis and separation in Huayangchuan U-Nb-Pb deposit.