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Surface mining including strip mining open pit mining and mountaintop removal mining is a quot Open pit mining quot refers to a method of extracting rock or minerals from the earth It is mostly associated with gold mining Jump up quot Gallery quot

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 · SMGB Information Report 2007 02 STATE MINING AND GEOLOGY BOARD Report on Backfilling of Open Pit Metallic Mines in California Department of Conservation Resources Agency

Michigan s first gold mine in decades gets tentative

MENOMINEE COUNTY MI A Canadian exploratory mining company just cleared a major hurdle on its path to build a controversial open pit gold zinc and copper mine next to a major river along the Michigan Wisconsin border On Friday Sept 2 the Michigan Department of Environmental Quality gave a

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arsenic and other salts from oxidized mine waters mercury if used in the process or from ores cyanide if used in leaching processes oil and fuels from ancillary operations other processing chemicals as may be used on the site groundwater constituents that may be pumped or discharged off site sewage from the site Acid Drainage Sub surface mining frequently goes below the water table so water

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The method of recovery of gold from the process slurry is by carbon adsorption Adsorption is a term used to describe the attraction of a mineral compound to the surface of another material Activated carbon is used to adsorb the gold out of solution Because the cyanide ion forms very strong complexes with gold it is the gold cyanide complex that is loaded onto the carbon rather than


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