| Basis for focus area |
Belt of moderate prospectivity correlative with ARDF occurrences hosted in volcanic succession and less abundant phyllites and argillites. |
| Identified resources |
None. |
| Production |
None recorded. |
| Status |
Unknown. |
| Estimated resources |
None. |
| Geologic maps |
Statewide geologic map database; Wilson, Hults and others (2015), scale 1:1,584,000. |
| Geophysical data |
Mostly (>90%) inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Regionally, greenstone units of the Chilakadrotna and to a lesser extent the Tlikakila Formations suggest seafloor magmatism. |
| Deposits |
None. |
| Evidence from mineral occurrences |
ARDF occurrences. |
| Geochemical evidence |
Sediment and soil anomalies in pathfinder elements including Cu, Ag, Pb, Zn, Cd, or Co. Additional geochemical evidence comes from pan concentrates containing anglesite, cerussite, chalcopyrite, copper sulfide/oxide, galena, or sphalerite. Heavy mineral concentrates containing Cu, Pb, Zn or Ag. |
| Geophysical evidence |
No data. |
| Evidence from other sources |
Medium prospectivity with local high prospectivity basins; Karl and others (2016). |
| Comments |
Belt contains the Chilikadrotna and Tlikakila Formations which both exhibit evidence of seafloor magmatism. There are a small number of mineral occurrences that have previously been explored with features that match VMS styles of mineralization / alteration. |
| Cover thickness and description |
Unknown. |
| Authors |
Douglas C. Kreiner, James V. Jones, III. |
| 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. |
