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Credit: Image courtesy NASA GSFC, MITI, ERSDAC, JAROS, and U.S./Japan ASTER Science Team
This Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) image covers 30 by
23 km (full images 30 x 37 km) in the Atacama Desert, Chile and was acquired on April 23, 2000.
The Escondida copper, gold, and silver open-pit mine is at an elevation of 3050 m, and came on
stream in 1990. Current capacity is 127,000 tons/day of ore; in 1999 production totaled 827,000
tons of copper, 150,000 ounces of gold and 3.53 million ounces of silver. Primary concentration
of the ore is done on-site; the concentrate is then sent to the coast for further processing
through a 170 km long, 9" pipe. Escondida is related geologically to three porphyry bodies
intruded along the Chilean West Fissure Fault System. A high grade supergene cap overlies
primary sulfide ore.