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Preliminary Investigation of a Low-grade Gold Deposit in Custer County, Idaho.
For Reference Only At Bureau Libraries :58 pages
The Bureau of Mines conducted a research program on the feasibility of recovering gold from the Golden Sunbeam Mine, Custer County, Idaho. This mine produced significant quantities of gold prior to 1920. The research program consisted of diamond drilling, geological mapping, assaying, computer analysis of assay data, metallurgical research and ore testing. Preliminary evaluation of the deposit infers about 82 million tons of submarginal gold and silver resources with an average value of $1.07 +/- $0.11 Per ton. This report presents the physical and historical aspects of the deposit as well as a detailed analysis of the Bureau's work, including the design of a hypothetical open pit.
For Reference Only At Bureau Libraries
Page last reviewed: September 2, 2020Content source: National Institute for Occupational Safety and Health Education and Information Division