不久前,人们还把地壳活动带花岗岩浆出现的地区看作是产生稀有金属矿化的唯一有利的环境,同时.花岗伟晶岩则被认为是稀有金属矿床基本的和主要的工业类型。近十五年来,发现了许多从前不知道的稀有金属矿床成因类型和新的含矿建造。如碳酸岩、交代-蚀变花岗岩(变花岗岩)、古老变质岩层中含稀有金属矿化的碱交代带、碱性岩周围含矿的长 Not long ago, the area where crustal activity belonged to granitic magma was also seen as the only favorable environment for rare metal mineralization, while granitic pegmatite was considered to be the basic and major industrial type of rare metal deposits. In the last fifteen years, many previously unknown genetic types of rare metal deposits and new ore-bearing constructions have been discovered. Such as carbonatite, metasomatic-alteration granite (metamorphic granite), alkaline metasomatic belt containing rare metal mineralization in the ancient metamorphic rocks, ore-bearing long