Plate 1. Map showing porphyry copper deposit t racts by age, discovered deposits, and prospects in the Andes Mountains of S outh America at s cale 1:4,000,000. Separate PDF file. Plate 2. Map showing porphyry copper deposit t racts by amount of m ean estimated undiscovered copper in the Andes Mountains of S outh America at s cale 1:4,000,000.Separate PDF file. Plate 3. Map showing porphyry copper deposit t racts by density of m ean estimated undiscovered copper in metric tons/km 2 in the Andes Mountains of S outh America at scale 1:4,000,000. Separate PDF file.

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The future of mining depends on balancing global demands for minerals with societal demands for sustainable development. The U.S. Geological Survey, in collaboration with a variety of international cooperators, is assessing the undiscovered global resources of copper, platinum-group elements, and potash at a scale of 1:1,000,000. Assessment products include maps that show significant identified deposits and permissive areas for undiscovered deposits, as well as probabilistic estimates of contained metal. Derivative products applicable to sustainability issues include maps showing the spatial relationship of permissive areas to infrastructure development, protected areas, threatened ecosystems, seismically active areas, and watersheds.

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