| Main commodities | Au; Cu |
|---|---|
| Other commodities | As |
| Ore minerals | arsenopyrite; chalcopyrite; pyrite; pyrrhotite |
| Gangue minerals | quartz |
| Quadrangle map, 1:250,000-scale | TL |
|---|---|
| Quadrangle map, 1:63,360-scale | A-6 |
| Latitude | 62.091 |
| Longitude | -152.578 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | Alaska Department of Natural Resources unpublished claim records show this locality, about one mile N10E of Distin Peak in the southeast quarter of Section 9, T. 23 N., R. 18 W., of the Seward Meridian. |
Geologic descriptionA small plug of Late Cretaceous (67 m.y.) diorite, assigned to the Kichatna plutons (TKk), intrudes Mesozoic flysch (KJs) in this area (Reed and Nelson, 1980). Cominco American Incorporated (unpublished report) describes vuggy veins, veinlets, and breccia of quartz-pyrrhotite- pyrite-chalcopyrite-and/or arsenopyrite that cut both the sedimentary and intrusive rocks. A similar occurrence is noted in Old Man Creek (TY026) in the Tyonek quadrangle. | |
| Geologic map unit | (-152.580243093305, 62.0904245447971) |
|---|---|
| Mineral deposit model | Polymetallic veins (Cox and Singer, 1986; model 22c). |
| Mineral deposit model number | 22c |
| Age of mineralization | Late Cretaceous; mineralization is interpreted to be linked to the Late Cretaceous diorite that is mapped as one of the 67 m.y. old Kichatna plutons by Reed and Nelson (1980). |
| Alteration of deposit | Quartz alteration. |
| Workings or exploration | Prospecting, silt and rock chip geochemistry and mapping at 1:12,000 scale by Cominco American Incorporated in the late 1980s. |
|---|---|
| Indication of production | None |
| MRDS Number | 10308447 |
|---|---|
References | |
| Reporters | Madelyn A. Millholland (Millholland & Associates) |
| Last report date | 8/10/1998 |