| Basis for focus area |
Prospectivity mapping analysis ( Karl and others, 2021). |
| Identified resources |
Identified resources and historical production of gold and silver. |
| Production |
Terra was in production briefly. |
| Status |
Past mining and current exploration. |
| Estimated resources |
Terra: 940,199 tons grading 0.446 oz/t Au for 419,600 oz Au, and 0.82 oz/t Ag for 766,600 oz Ag; Estelle: Inferred resource of 181.29 M metric tonnes grading 0.43 g/tonne Au for a total of 2.5 M oz 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 |
Terra, Estelle. |
| 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. |
