运用电子微探针（ＥＭＰ）和二次离子质谱（ＳＩＭＳ）对安徽女山新生代碧玄岩中的１３个单斜辉石巨晶进行了主要元素和稀土元素的分析，１３件样品表现出稀土总量与Ｎａ质量分数的正相关。根据这些数据，结合文献中的资料，我们认为不同种矿物间稀土质量分数的差异是由晶体化学性质决定的；而同种矿物在一个相对简单的地球化学过程中，它们之间的稀土质量分数变化受地球化学过程发生的程度和周围环境的控制。 Thirteen clinopyroxene megacrysts in the Nüshan Cenozoic Bixuan rock in Anhui Province were analyzed for major elements and rare earth elements by using electron microprobe (EMP) and secondary ion mass spectrometry (SIMS). 13 samples showed rare earth total Correlation between quantity and Na mass fraction. Based on these data and the data in the literature, we consider that the difference of rare earth mass fraction among different minerals is determined by the crystal chemistry; while the same minerals in a relatively simple geochemical process, the rare earth mass fraction Changes are controlled by the extent of geochemical processes and the surrounding environment.