Western Alaska Range

Region Alaska, Alaska
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Belt of moderate prospectivity correlative with ARDF occurrences hosted in volcanic succession and less abundant phyllites and argillites.
Identified resources None.
Production None recorded.
Status Unknown.
Estimated resources None.
Geologic maps Statewide geologic map database; Wilson, Hults and others (2015), scale 1:1,584,000.
Geophysical data Mostly (>90%) inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Regionally, greenstone units of the Chilakadrotna and to a lesser extent the Tlikakila Formations suggest seafloor magmatism.
Deposits None.
Evidence from mineral occurrences ARDF occurrences.
Geochemical evidence Sediment and soil anomalies in pathfinder elements including Cu, Ag, Pb, Zn, Cd, or Co. Additional geochemical evidence comes from pan concentrates containing anglesite, cerussite, chalcopyrite, copper sulfide/oxide, galena, or sphalerite. Heavy mineral concentrates containing Cu, Pb, Zn or Ag.
Geophysical evidence No data.
Evidence from other sources Medium prospectivity with local high prospectivity basins; Karl and others (2016).
Comments Belt contains the Chilikadrotna and Tlikakila Formations which both exhibit evidence of seafloor magmatism. There are a small number of mineral occurrences that have previously been explored with features that match VMS styles of mineralization / alteration.
Cover thickness and description Unknown.
Authors Douglas C. Kreiner, James V. Jones, III.
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.