| Basis for focus area |
10 km buffer on zunyite occurrence in small lithocap deposit with Al, K2SO4, H2SO4, ± Ga in alunite (zunyite) (latitude 41.3685, longitude -116.6526). |
| Identified resources |
Historical production of silver. |
| Production |
Unknown. |
| Status |
Past mining; gold exploration ~2005-2007. |
| Estimated resources |
Unknown. |
| Geologic maps |
Coats (1987), scale 1:250,000; Stewart and Carlson (1976), scale 1:250,000. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Eocene diorite that is variably brecciated and hydrothermally altered (Cantor, 2012). |
| Deposits |
Zunyite lode (MRDS dep_id: 10221546). |
| Evidence from mineral occurrences |
MRDS; Cantor (2012). |
| Geochemical evidence |
Anomalously high Bi, Te, In, and Mo reported in a soil survey. Fluorine is enriched in zones of advanced argillic alteration (Cantor, 2012). |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Comments |
Molybdenum-F soil anomaly associated with Eocene intrusion. Molybdenite observed in some drillholes and potassic alteration suggest potential for a porphyry Mo deposit beneath the advanced argillic alteration. Enrichment of Sb, As, Ge, Mn, and Zn inferred from the mineral system/deposit type table (Hofstra and Kreiner, 2020). |
| Cover thickness and description |
Mostly surficial, but drillhole evidence indicates the argillic cap is underlain by a porphyry-type system (Cantor, 2012). |
| Authors |
John L. Muntean, Joshua M. Rosera. |
| New data needs |
Geophysics. |
| Geologic mapping and modeling needs |
None requested at this time. |
| Geophysical survey and modeling needs |
High resolution aeromagnetic and aeroradiometric coverage. |
| Digital elevation data needs |
Lidar in progress (GeoDAWN). |
