Fig. S2. Permian–Triassic felsic tuffs in South Island, New Zealand: significance for oceanic and active continental margin subduction

Major-element oxide variation plots for the Maitai Group and the Murihiku Terrane. (a)–(f) Maitai Group: (a) Al2O3 v. SiO2; (b) Fe2O3 v. SiO2; (c) MgO v. SiO2; (d) MnO v. SiO2; (e) TiO2 v. MgO; (f) Fe2O3 v. MgO. (g)–(i) Murihiku Terrane: (g) Fe2O3 v. SiO2; (h) MgO v. SiO2; (i) TiO2 v. Al2O3. See text and the Supplementary field and petrographic information for explanation.