Central Alaska PCD

Region Alaska, Alaska
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Permissive geology, substantial ARDF occurrences with porphyry copper characteristics.
Identified resources Identified resources of copper.
Production None recorded.
Status Current and past exploration.
Estimated resources Round Top 200 Mt at 0.35% Cu and 100 Mt at 0.5% Cu.
Geologic maps No modern mapping better than 1:250,000 scale.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Granodiorite to monzonite porphyry.
Deposits None.
Evidence from mineral occurrences Multiple porphyry-related ARDF occurrences including Round Top, Purcell Mountain, Orion, Yanert, and Costello Creek.
Geochemical evidence Mo, Cu, Au, Ag, Pb, Zn.
Geophysical evidence No data.
Evidence from other sources Isolated occurrences scattered across the central to western interior suggests local preservation of arc magmatic event.
Cover thickness and description Unknown.
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.