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1/1/1992 - Information CircularsA U.S. Bureau of Mines study on the potential availability of copper from 204 mines and deposits in market economy countries.
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1/1/1992 - Reports of InvestigationsThe Bureau of Mines conducted Cu exchange tests for six common clays under simulated in situ leaching conditions. Regression equations were obtained from the data expressing the Cu exchange capacity as a function of Cu concentration, pH, and temperature.
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Content source: National Institute for Occupational Safety and Health, Mining Program