各稀土元素相同的地球化学性状,使它们常以一个特殊的“共性集团”存在于自然界里,在地质作用过程中常作整体运移。但当地质环境发生重大变化时,它们呈现出有规律的分馏,且具特定的分配模式。所以地质学家把它们作为一种重要地球化学跟踪元素来研究一些重大地质问题。如用来探讨各种岩石的成因和分类,乃至研究地壳、地幔,地球及 Geochemical characteristics of the same rare earth elements, so that they often have a special “common group ” exists in nature, in the process of geological processes for the overall migration. However, when major changes occur in the geological environment, they show a regular fractionation and have specific distribution patterns. So geologists use them as an important geochemical tracking element to study some of the major geological issues. Such as to explore the causes and classification of various rocks, and even study the crust, mantle, earth and