| Basis for focus area |
Prospectivity mapping analysis ( Karl and others, 2021). |
| Identified resources |
Identified resources and historical production of gold. |
| Production |
Nixon Fork mine (1918-1964); Current activity to restart mine. |
| Status |
Past mining and current exploration. |
| Estimated resources |
Vinisale: Inferred 37.26 Mt @ 1.11 g/t Au; Chicken Mountain: Inferred 14.5 Mt @ 1.2 g/t Au; Nixon Fork: Indicated 204,206 tons at 17.6 g/t Au and Inferred 107,860 tons @ 18.0 g/t Au; Shotgun: Inferred 20.73 Mt @ 1.03 g/t Au; Donlin Gold: Measured and Indicated 541 Mt @ 2.2 g/t Au and Inferred 92 Mt @2.0 g/t Au. |
| Geologic maps |
No modern mapping better than 1:250,000 scale. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
mildly oxidized to mildly reduced granitic plutons exhibiting geochemical characteristics of crustal contamination/crustal derivation. |
| Deposits |
Donlin, Vinasale, Shotgun, Chicken Mountain. |
| Evidence from mineral occurrences |
Hundreds of ARDF occurrences consistent with intrusion-related gold systems. |
| Geochemical evidence |
HUC's are moderately to highly anomalous in W, As, Sb, and Se in streambed 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. |
