| Basis for focus area |
Prospectivity mapping analysis ( Karl and others, 2021). |
| Identified resources |
Historical production of gold. |
| Production |
Past production at Rock Creek and Big Hurrah mines. |
| Status |
Past mining and current exploration. |
| Estimated resources |
Rock Creek and Big Hurrah (2008): Identified combined Proven and Probable reserves of 510,000 oz Au, with additional Indicated resources of ~250,000 oz Au and Inferred resources of ~86,000 oz Au (Ennis, 2008). |
| Geologic maps |
Minor 1:63,360 scale geologic mapping; little modern mapping better than 1:250,000. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Greenschist-, blueschist-, and amphibolite-facies metamorphic rocks; orogenic collapse. |
| Deposits |
Rock Creek and Big Hurrah mines. |
| 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 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. |
