Figure 8. Chondrite-normalized REE distribution in the products of the partial (a) and fractional (b) melting of normal primitive mantle having a composition of spinel peridotite Ol0.578 + Opx0.27 + Cpx0.119 + Spl0.033. The thick line is the average composition of primary magmas in the Kola alkaline province, the shaded line denotes the compositions of the alkaline-ultramafic and phonolite series. The thin lines are the model compositions of the melts and complementary restites (broken lines) for the 0.1-10% degrees of melting. The normalizing factors used were after Evensen et al. [1978].