| Main commodities | Cu; Zn |
|---|---|
| Ore minerals | chalcopyrite; pyrite; sphalerite |
| Gangue minerals | calcite; epidote; quartz |
| Quadrangle map, 1:250,000-scale | BS |
|---|---|
| Quadrangle map, 1:63,360-scale | D-7 |
| Latitude | 59.965 |
| Longitude | -149.284 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | The occurrence is on the east side of the south arm of Humpy Cove (formerly called Sunny Bay by Martin and others,1915) in the NE1/4 of section 33, T. 3 S., R. 1 E., of the Seward Meridian. This is Tysdal's ( 1978) location 107 and is accurate to within a quarter mile. |
Geologic descriptionThe mineralization is within a brecciated shear zone of Cretaceous Valdez Group greenstone (Tysdal and Case, 1979). The cement of the breccia is composed of quartz, calcite, sphalerite, pyrite, epidote, and chalcopyrite. A tunnel, 35 feet long, has been run along a shear zone that strikes N 32 W and dips 68 W. About 200 feet southwest of this tunnel another shear occurs which has been drifted on for about 35 feet. This zone is about six feet wide and strikes N 12 W with a vertical dip (Martin and others, 1915). No assay results are reported for this prospect. | |
| Geologic map unit | (-149.286133675842, 59.9644396905992) |
|---|---|
| Mineral deposit model | Cyprus massive sulfide (Cox and Singer, 1986; model 24a). |
| Mineral deposit model number | 24a |
| Age of mineralization | Cretaceous or younger; breccia zone in Cretaceous greenstone. |
| Workings or exploration | Two tunnels each about 35 feet in length were driven prior to 1915. No assay results were reported (Martin and others, 1915). |
|---|---|
| Indication of production | None |
Additional commentsPrior to 1953 Humpy Cove was known as Sunny Cove. | |
| MRDS Number | A010599 |
|---|---|
References | |
| Reporters | Jeff A. Huber (Anchorage) |
| Last report date | 1/26/1999 |