| Quadrangle map, 1:250,000-scale | MG |
|---|---|
| Quadrangle map, 1:63,360-scale | B-1 |
| Latitude | 62.389 |
| Longitude | -153.058 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | This unnamed occurrence is located in a steep, south-flowing tributary of the Tatina River at an elevation of 3,350 feet (1,021 m) in the NW1/4, T. 27 N., R. 20 W., of the Seward Meridian. The reporter visited the site in 1984; at station no. 84BT117. |
Geologic descriptionThis unnamed occurrence is a low sulfide, quart-carbonate vein system that strikes east-west near the contact between the Upper Triassic to Lower Jurassic, Tatina River Volcanics and the Lower Cretaceous Kahiltna Flysch (Bundtzen, Harris, and Gilbert, 1997). The mineralized zone occurs in a well-defined shear zone subparallel to bedding; it continues for at least 140 meters, and varies from 15 centimeters to one meter thick. Principle sulfides include pyrite and minor to trace chalcopyrite disseminated throughout the quartz-carbonate vein. Two samples taken across the vein averaged 230 ppm zinc, 314 ppm copper, and 90 ppm lead. | |
| Geologic map unit | (-153.060236722302, 62.3884117095275) |
|---|---|
| Mineral deposit model | Polymetallic vein (Cox and Singer, 1986; model 22c). |
| Mineral deposit model number | 22c |
| Workings or exploration | The reporter sampled the site in 1984. Two samples taken across the vein in separate locations averaged 230 ppm zinc, 314 ppm copper, and 90 ppm lead. |
|---|---|
| Indication of production | None |
| Reserve estimates | None. |
| MRDS Number | 10307874 |
|---|---|
References | |
| Reporters | T.K. Bundtzen (Pacific Rim Geological Consulting) |
| Last report date | 12/10/1998 |