| 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. |
