一、前言最近十年以来,在世界許多国家內发現很多有工业价值的稀有元素矿床,其中很多不仅規模巨大,而且产状特殊,和以前大家承认的矿床分类或成矿理論比較,都有其独特之处,故可划为新的矿床类型。这些新发現的矿床虽然多数是以稀有金属为主,但有一共同特点,即都和放射性元素有或多或少的共生关系,而且很多矿点就是在普查勘探放射性元素矿床时发現的。如果我们考虑一下放射性元素(鈾和钍是自然产出的最主要的放射性元素)同很多稀有元素,如铌、鉏、锆、 I. Introduction Since the last decade, many rare-earth deposits of industrial value have been discovered in many countries in the world. Many of them are not only huge in scale but also have special peculiar shapes. Compared with the previously accepted classification or ore-forming theories, there are Its uniqueness, it can be classified as a new deposit type. Although most of the newly discovered deposits are mainly rare metals, they have a common feature that they all have more or less symbiotic relationship with radioactive elements, and many ore deposits were discovered during the census of radioactive mineral deposits. If we consider the radioactive elements (uranium and thorium are the main radioactive elements of natural output), together with many rare elements such as niobium, zirconium, zirconium,