"Landscape evolution" is a phrase used increasingly in the lexicon of economic geologists, but the interpretation of the low-temperature thermochronology data used to quantitatively constrain terrain modification processes is subtle and generally non-intuitive to workers using other geochronological techniques to determine absolute ages (e.g., what is the age of ore formation or granite emplacement?). The main purpose of the McInnes et al. (1999) paper was to demonstrate the potential application of the new (U-Th)/He dating technique to the paleoreconstruction of fault-related ore districts. We reported results from a pilot project conducted at the Chuquicamata mine in northern Chile, and...

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