在四川冕宁稀土矿床霓辉重晶伟晶岩和碳酸岩矿体的早期萤石、石英中发现了大量的流体－熔融包裹体。包裹体的捕获温度高于５００℃，说明两类矿体为典型的盐熔体结晶产物。研究还显示，在矿石矿物氟碳铈矿中，存在着大量的流体包裹体，这说明矿床的稀土矿化与热液作用有成因联系，成矿温度为１５０－２７０℃。所有研究结果均证明，四川冕宁矿床是一个与盐熔体有关的热液稀土矿床。 A large number of fluid-melt inclusions have been found in the early fluorite and quartz of the Ni-hui recrystallized pegmatites and carbonate rocks in the Mianning rare-earth deposit, Sichuan Province. Inclusion temperature of the inclusions is higher than 500 ℃, indicating that two types of ore bodies are typical salt melt crystal products. The study also shows that there are a large number of fluid inclusions in the ore minerals bastnaesite, which shows that the mineralization of rare earths in the deposit is genetically linked to the hydrothermal effect. The metallogenic temperature is 150-270 ℃. All the research results show that the Mianning deposit is a hydrothermal rare earth deposit related to salt melt.