Fig. 7

A-B diagram after Debon and Le Fort (1988) for orthogneisses and paragneisses (data from Zurbriggen et al. 1997), garnet amphibolites (data from Buletti 1983) and dark layers of banded amphibolites (data from Pinarelli et al. 2008) of the Southern Alpine Strona-Ceneri Zone (SCZ). Data of I-type granitoids from the Lachlan Fold Belt (LFB, Australia) and the tonalitic Fusht Complex (southern Oman) are from Chappell and White (1992) and Hauser and Zurbriggen (1994), respectively. Mean compositions of pelites or shales (P) and greywackes (G) are from Pettijohn (1963), and mean composition of common basalts (B) is from Le Maitre (1976). I-S line and fields for h-P (highly peraluminous), m-P (moderately peraluminous), l-P (low peraluminous) and f-P (felsic peraluminous) are drawn according to Villaseca et al. (1998). For explanations see text