Glacier Bay

Region Alaska, Alaska
Mineral systems
Deposit types
Critical minerals
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 and molybdenum.
Production None recorded.
Status Past exploration.
Estimated resources Nunatak: 145 Mt at 0.02% Cu and 0.05% MoS2; Bruce Hills: 20 Mt at 0.08% Cu and 0.05% MoS2.
Geologic maps Little to no modern mapping at better than 1:250,000 scale.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Calc-alkaline, biotite granite to monzonites, granodiorite arc rocks.
Deposits Nunatak, Bruce Hills.
Evidence from mineral occurrences ARDF occurrences including the larger Quartz Hill, Burroughs Bay, Margarie, Nunatak, Bruce Hills occurrences.
Geochemical evidence Cu, Mo, Pb, Zn anomalies in rock chips and streambed sediments.
Geophysical evidence No data.
Evidence from other sources Favorable calc-alkaline felsic to intermediate arc rocks with locally reactive host rocks.
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.