Compilation of Data for Phase I of the Mineral Resource Evaluation of the Bureauof Land Management Black River and Fortymile River Subunits

摘要

The Alaska State Director of the Bureau of Land Management requested the U.S.Bureau of Mines to evaluate the mineral resources and mine hazards of the Fortymile River and Black River Planning Subunits in east-central Alaska. This report compiles the historic mining and exploration activity and analytical results from the phase I reconnaissance of the planning subunits. The data, combined with results from phase II (1995), will be used in a probabilistic assessment of the mineral resource potential for the planning subunits. Mineral occurrences and geochemical anomalies were samples with the intent to verify and characterize mineral deposits. Granitic rocks were sampled and characterized by major oxide analyses to support the metallogenic classification of known and unknown mineral occurrences. Three-hundred-nineteen rock, forty-two soil, thirty-four stream sediment, and sixty-four panned concentrate samples were collected.