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根据岩石类型和地质产状,本文提供的稀土元素地球化学样品可分三组。通过(Ce)_N(Yb)_N变异图解和定量模式约束,第一组属轻稀土亏损型配分型式,在同源地幔条件下可形成一个密切相关的残余地幔岩组。与第二组和第三组所代表的两次岩浆事件相互印证。根据实验和定量模式计算,笔者提出底辟上涌地幔两期熔融。并运用稀土元素资料,建立了岩石成因的若干判别准则。
According to rock type and geological occurrence, the REE geochemistry samples provided in this paper can be divided into three groups. By means of the (Ce) _N (Yb) _N variational graphical and quantitative model constraints, the first group is a light rare earth depleted type distribution pattern that can form a closely related residual mantle rock group under the same mantle condition. Which is confirmed by the two magmatic events represented by the second and third groups. According to the experimental and quantitative model calculation, the author proposed two periods of melting of the upper porphyry upwelling mantle. Using rare earth element data, a number of criteria for determining the origin of rock have been established.