研究侵入体中元素同位素组成的天然变化对于估计岩浆源深度,确定岩石及矿石的生成次序以及了解岩浆作用与成矿过程的联系等问题会有很大的帮助。最有前景的是基性与超基性侵入岩及在成因及空间上与之有关的岩浆矿床,因为它们侵入迅速以及在地壳中受混染最少,所以这类岩石及矿石的元素同位素组 Studying the natural variations of isotopic compositions of intrusions will be of great help in estimating the depth of magma, determining the order of rock and ore formation, and understanding the relationship between magmatism and mineralization. Most promising are mafic and ultrabasic intrusive and magmatic deposits that are genetically and spatially related because of their rapid invasion and least contamination in the earth’s crust, so the isotopic composition of these rocks and ores