Age and geochemistry of host rocks of the Cobre Panama porphyry Cu–Au deposit, central Panama: Implications for the Paleogene evolution of the Panamanian magmatic arc

The Cobre Panama porphyry Cu–Au deposit, located in the Petaquilla district of central Panama, is hosted by a sequence of medium- to high-K calc-alkaline volcanic and sub-volcanic rocks. New crystallisation ages obtained from a granodiorite Petaquilla batholith and associated mineralised diorite to granodiorite porphyry stocks and dikes at Cobre Panama indicate that the batholith was emplaced as a multi-phase intrusion, over a period of ~4million years from 32.20±0.76Ma to 28.26±0.61Ma, while the porphyritic rocks were emplaced over a ~2 million year period from 28.96±0.62Ma to 27.48±0.68Ma.