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montello2000

02/24/13 12:22 PM

#107886 RE: gitreal #107884

Barrick has hard rock mines in Nevada but the one up the road and most in Northern Nevada are "gravel" mines. They tend to chemically extract the gold in big vats and what they miss goes into a leach field where cyanide is sprayed on it to get every last bit.
Black rock uses water to "placer" extract the gold by gravity. Cheaper process but less gold.