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序言随着近代工业与最新科学技术的发展,对稀散元素的要求量迅速提高,因而各国地质学者对研究稀散元素矿产地质的兴趣逐渐增强。特别是近几年采,由于苏联接连几个人造卫星、行星及星际站的上天等震惊世界的科学技术新成就,开辟了人类历史在科同技术上的新阶段,加之美国及其他帝国主义国家所执行的经济军事化政策,就使得稀散元素工业正处在
Preamble With the development of modern industry and the latest science and technology, the demand for rare-earth elements is rapidly increasing. Therefore, geologists in various countries are increasingly interested in studying the mineral geology of rare-earth elements. In recent years, in particular, new achievements in science and technology that shocked the world in the Soviet Union with several man-made satellites, as well as planetary and astrological stations have opened up a new phase of human history in science and technology. In addition, the United States and other imperialist countries The policy of militarization of economy carried out makes the sparse-element industry in the midst of it