Morphotectonic and Geologic Digital Map Compilations of the South-Central Andes (36°–42°S)

Abstract

Classic example of ocean-continent subduction zone – 3 main volcanic arcs active today: • NVZ, CVZ, SVZ • Summarize tectonic, geologic, and geochemical characteristics: The Andes Melting process similar to island arcs – H 2 O fluxed melting of asthenosphere Slab-dip controls on mantle wedge melting – Explains 3 volcanic arcs separated by non-volcanic zones – Uplift, exposure of batholiths in non volcanic zones may reflect shallow slab dip