Chugach 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 Past production on small scale.
Status Past mining and current exploration.
Estimated resources Lucky Shot and War Baby mines: current combined Proven, Probable, Measured, Indicated, and Inferred resource of 292,661 tons grading 0.536 oz/t Au and 0.052 oz/t Ag.
Geologic maps No modern mapping better than 1:250,000 scale.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Greenschist- to amphibolite-facies metamorphic rocks, orogenic collapse.
Deposits The Lucky Shot and War Baby historical mines have current resource estimates. Numerous other gold veins were mined historically in the Willow district, including Independence mine.
Evidence from mineral occurrences Hundreds of ARDF occurrences consistent with intrusion-related and orogenic 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.