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本文利用一种新的方法和（或）lgCi－lgCi图解法，明显地区分出地幔平衡部分熔融作用和岩浆分离结晶作用。并以亚速尔群岛中Terceira岛火山岩和汉诺坝玄武岩的实际资料验证了所推导的方法。
In this paper, a new method and / or lgCi-lgCi graphical method is used to clearly distinguish the partial melting of the mantle from the magma separation and crystallization. The method deduced from the actual data of Terceira volcanic rocks and Hannuoba basalts in the Azores is validated.