Massive Landslide In Kennecott Copper Bingham Canyon Mine, Oquirrh Mountains, Salt Lake City, Utah, United States

Impurities and precious metals settle to the bottom of the electrolytic cells as "slimes." A chlorination leaching process recovers the gold and silver, which is melted in induction furnaces.
Production
Over its life, Bingham Canyon has proven to be one of the world's most productive mines. As of 2004, ore from the mine has yielded more than 17 million tons (15.4 Mt) of copper, 23 million ounces (715 t) of gold, 190 million ounces (5,900 t) of silver, and 850 million pounds (386 kt) of molybdenum. The value of the resources extracted from the Bingham Canyon Mine is greater than the Comstock Lode, Klondike, and California gold rush mining regions combined. Mines in Chile, Indonesia, Arizona, and New Mexico now exceed Bingham Canyon's annual production rate. High molybdenum prices in 2005 made the molybdenum produced at Bingham Canyon in that year worth even more than the copper. The value of metals produced in 2006 at Bingham Canyon was US$1.8 billion dollars.