| Quadrangle map, 1:250,000-scale | MG |
|---|---|
| Quadrangle map, 1:63,360-scale | A-5 |
| Latitude | 62.066 |
| Longitude | -155.12 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | The unnamed occurrence is located on a steep east-facing slope overlooking Cheeneetnuk River, at an elevation of 1,400 feet (427 m) in the southern half of sec. 22, T. 23 N., R. 32 W., of the Seward Meridian. The occurrence corresponds to map number 120 of Gilbert (1981); his station no. 77WG5. |
Geologic descriptionThis unnamed occurrence is a mineralized, pyritic argillite near the contact between Middle Devonian limestone and upper Paleozoic argillite, both subdivisions of the Mystic subterrane (Gilbert, 1981; Wilson and others, 1998). The argillite appears to be thermally upgraded to hornfels; a mid-Tertiary granite pluton is exposed about one mile west of the occurrence. One grab sample contained 178 ppm copper and 0.7 grams/tonne silver (Gilbert, 1981). | |
| Geologic map unit | (-155.122306324647, 62.0653447044775) |
|---|---|
| Mineral deposit model | Polymetallic replacement? (Cox and Singer, 1986; model 19a?). |
| Mineral deposit model number | 19a? |
| Workings or exploration | W.G. Gilbert found the mineral zone during a geologic mapping project for the Alaska Division of Geological and Geophysical Surveys in 1977 (Gilbert, 1981). One grab sample contained 178 ppm copper and 0.7 grams/tonne silver. |
|---|---|
| Indication of production | None |
| Reserve estimates | None. |
| MRDS Number | 10307836 |
|---|---|
References | |
| Reporters | T.K. Bundtzen (Pacific Rim Geological Consulting) |
| Last report date | 12/10/1998 |