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Executive Summary: Appraisal of Selected Mineral Resources of the Black Hills National Forest, South Dakota and Wyoming.
Gersic J; Peterson EK; Schreiner RA
MISSING :29 pages
In 1989-90, the Bureau of Mines appraised selected high-mineral- resource potential areas containing gold, rare-earth-element, or pegmatite deposits in or near the Black Hills National Forest. Available data were used to construct mine and mill models and to calculate discounted-cash-flow rate-of-return analyses. The economic feasibility of possible operations and the probability (nonmathematical) of exploration and development within the next decade were assessed. Exploration and development probabilities were forecast for the Lead-Deadwood, Galena, Rochford, Keystone, Medicine Mountain, Bear Lodge Mountains, Mineral Hill, Tinton, and Southern Black Hills pegmatite areas. This report summarizes a companion report (MLA 5-90).
Page last reviewed: December 3, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division