科学地按不同类型考察地幔岩的稀土元素丰度是深部地球化学领域重要的基础研究。由于稀土元素作为微量示踪元素包含着夭体演化和地球演化的大量信息,所以地幔岩稀土地球化学在揭示核-幔分离和壳-幔分异规律方面具有重要的意义。普遍估计,原始地幔的稀土元素丰度应是普通球粒陨石简单的倍数关系。因此,实际考察各种类型地幔岩的稀土元素含量和相对丰度,可能加深我们对不同构造区域地幔地球化学特征及其演化的认识。例如地幔微 Studying scientifically the REE abundance of mantle rocks by different types is an important basic research in the deep geochemistry field. Because rare earth elements trace trace elements contain a lot of information about the evolution of the dome and the evolution of the earth, the rare earth geochemistry of the mantle rocks is of great significance in revealing the law of the separation between the crust and the mantle. It is generally estimated that the abundance of rare earth elements in the original mantle should be a simple multiple of normal chondrules. Therefore, it is possible to deepen our understanding of the geochemical characteristics and evolution of the mantle in different tectonic regions by actually examining the REE contents and relative abundances of various types of mantle rocks. For example, mantle micro