| Quadrangle map, 1:250,000-scale | UN |
|---|---|
| Quadrangle map, 1:63,360-scale | C-3 |
| Latitude | 53.7667 |
| Longitude | -166.9333 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | Northwest side of Humpback Bay, Makushin Bay. Anomaly no. 9 of Christie (1974). |
Geologic descriptionThis occurrence is a zone of orange to brown iron-staining that covers an irregularly shaped 500 ft (150 m) by 1,000 ft (300 m) area. It consists of finely disseminated pyrite in a variety of host rocks. the host rocks include a coarse-grained feldspar porphyry dacite sill or plug, amygdaloidal andesite flows and pyroclastic rocks, and fine grained feldspar-porphyritic andesite (?). Pyrite occurs in low to moderate amounts in all units; its weathering causes gossanous oxidation. Fracturing is poorly developed, rock is fairly massive. | |
| Geologic map unit | (-166.935179181812, 53.7658469559881) |
|---|---|
| Mineral deposit model | Copper porphyry? |
| Mineral deposit model number | 17 |
| Age of mineralization | Cenozoic |
| Alteration of deposit | Description suggests propylitic and possibly some argillic alteration; chlorite is the only phase explicitly mentioned. Moderate leaching of some phase (presumably pyrite?) was reported. |
| Workings or exploration | Five samples were collected, one of which showed 92 ppm copper and one 0.02 ppm gold, otherwise results were unimpressive (Christie, 1974). Presumably, some reconnaissance mapping was conducted. |
|---|---|
| Indication of production | None |
| MRDS Number | A106013 |
|---|---|
ReferencesChristie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (Report held by the Aleut Corporation, Anchorage, Alaska.) | |
| Reporters | Damon Bickerstaff, F.H. Wilson |
| Last report date | 5/8/1996 |