Tito and Paulina provided an introduction to geology.
Modern mining has been in progress at Chuquicamata on the order of 100 years. The mine pit is now a kilometer deep, and plans are to go another kilometer down before switching to underground methods; giving at least a couple hundred more years to the life of the mine.
Like Spence yesterday, we have both oxide and sulfide mineralization here, and both copper and molybdenum are being extracted.