Figure 17. AFC model [DePaolo, 1981] in the La/Sm- eNd. plane. The calculations assume (A) 10% melt assimilating depleted mantle with eNd (2.45) = +2.5 and (B) 10% CHUR melt assimilating crustal rock. Contaminants are Belomorian tonalite samples with a 2.75 Ga zircon age and Chupa Formation gneiss samples the with a 2.85 Ga zircon age. Geochemical characteristics of the samples are given in [Lobach-Zhuchenko et al., 1998].