| Basis for focus area |
Prospectivity mapping analysis ( Karl and others, 2021). |
| Identified resources |
Identified resources and historical production of gold. |
| Production |
Current production at Kensington and Greens Creek. |
| Status |
Past and currently active mining, current exploration. |
| Estimated resources |
Kensington mine: current resource (inclusive of reserves) of 5,977,000 tons grading 0.232 oz/t Au for 1,384,000 oz Au; Herbert Gold deposit: Indicated and Inferred resource of 1,686,534 tons grading 0.202 oz/t Au for 340,100 oz Au. |
| Geologic maps |
No modern mapping better than 1:250,000 scale. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Greenschist to amphibolite facies metamorphic rocks, orogenic collapse. |
| Deposits |
Kensington, Greens Creek. |
| 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. |
