Yukon-Tanana Upland 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 for gold; historical and current production of gold.
Production Current production at Pogo and Fort Knox.
Status Past and current mining; current and past exploration.
Estimated resources Pogo mine: 9.693 Mt @ 0.471 oz/t Au for a total of 4.150 M oz Au; Fort Knox mine: 564.28 Mt grading 0.010 oz/t Au for a total of 5,641,000 oz Au; Golden Summit (Dolphin): 146.56 Mt grading 0.020 oz/t Au for a total of 2,947,000 oz Au; Livengood: 637.3 Mt grading 0.020 oz/t Au for a total of 12,588,400 oz Au.
Geologic maps New 1:63,360-scale mapping in progress in the Tanacross and Eagle quadrangles. Large sections of area are unmapped at better than 1:250,000 scale.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage, will be partly addressed by planned Phase 1 Earth MRI coverage acquisition.
Favorable rocks and structures Greenschist-facies metamorphic rocks post dating orogenic collapse; Ilmenite-series to weakly oxidized granites with crustal affinities.
Deposits Fort Knox, Pogo, Livengood, Golden Summit, Gil.
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 stream 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.