Andean magmatism can show all the complexity of island arcs but with the added complication of contamination. Adding hot molten basalt to the base of continental crust can melt this crust - because granitic rocks have much lower freezing points than basalts (c. 6-700C rather than >1000C). The basalt and granitic melts can mix to make hybrids or drive new granitic melt too.
