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.