At the Cerro Verde district in southern Peru, granodiorite porphyry stocks formed two adjacent porphyry copper-molybdenum deposits that collectively form one of the largest copper districts in the world, with current resources of ~17 million metric tonnes (Mt) of copper. The district is located within the Coastal batholith of western Peru. The Coastal batholith in the Cerro Verde area consists of the Cretaceous Tiabaya and the Paleocene Yarabamba granodioritic plutons. Granodiorite porphyry stocks associated with the porphyry coppermolybdenum deposits were emplaced into the Yarabamba plutons.

The granodiorite porphyry stocks are composite, steep-walled cylinders. Breccia bodies of diverse textures are...