Distribution Analysis, and Recovery of Gold from Kantishna Placers, Alaska.
For Reference Only At Bureau Libraries :54 pages
In 1983, the U.S. Bureau of Mines, using contractors and conducting independent studies, evaluated the mineral resources of the Kantishna Hills area of Denali National Park and Preserve, south- central Alaska. Geological and engineering studies addressed types and abundance of mineralization, mineral development potential, and acquisition costs of mineral claims. The Bureau of Mines collected reconnaissance and site specific bulk placer samples to evaluate the mineral development potential of 27 drainages and analyze the size distribution of gravel and gold on 5 steams in the Kantishna Hills study area. Sizing studies conducted on five steams suggest that over 99% of the gold ranges from minus 6 to plus 70 mesh with the biggest percentage being plus 40 mesh in size. Recommended placer recovery plants on these streams shoul.D be desinged to recover plus 70-mesh gold and classify gravels to minus 1 mesh in size prior to processing through a recovery device. Ten streams were rated as having high mineral development potential; 5 of these steams lack current mining activity.
For Reference Only At Bureau Libraries
Alaska Field Operations Center