Western Alaska Range Gold

Region Alaska, Alaska
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Prospectivity mapping analysis ( Karl and others, 2021).
Identified resources Identified resources and historical production of gold and silver.
Production Terra was in production briefly.
Status Past mining and current exploration.
Estimated resources Terra: 940,199 tons grading 0.446 oz/t Au for 419,600 oz Au, and 0.82 oz/t Ag for 766,600 oz Ag; Estelle: Inferred resource of 181.29 M metric tonnes grading 0.43 g/tonne Au for a total of 2.5 M oz Au.
Geologic maps No modern mapping better than 1:250,000 scale.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Mildly oxidized to mildly reduced granitic plutons exhibiting geochemical characteristics of crustal contamination / crustal derivation.
Deposits Terra, Estelle.
Evidence from mineral occurrences Hundreds of ARDF occurrences consistent with intrusion-related gold systems.
Geochemical evidence HUC's are moderately to highly anomalous in W, As, Sb, and Se in streambed sediments and rock chip samples.
Geophysical evidence No data.
Evidence from other sources Prospectivity analyses conducted by Karl and others (2021) show large areas of this region containing HUC's with medium to high prospectivity with medium to high certainty.
Cover thickness and description No cover to unknown cover depths.
Authors Douglas C. Kreiner, James V. Jones III, Melanie B. Werdon.
New data needs New mapping, geophysics, updated geochemical sampling.
Geologic mapping and modeling needs Mapping at 1:100,000 scale or better.
Geophysical survey and modeling needs Aeromagnetics and radiometrics collected at Rank 2.
Digital elevation data needs IfSAR coverage is complete over entire focus area.