| Quadrangle map, 1:250,000-scale | AD |
|---|---|
| Quadrangle map, 1:63,360-scale | C-2 |
| Latitude | 51.8283 |
| Longitude | -176.6069 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | South of Finger Bay, approximately 1.35 km southeast of where road first reaches Finger Bay. Location is accurate within about 100 m. Elevation about 150 m. |
Geologic descriptionGeologic map (Fraser and Snyder, 1959) shows locality is near contact where gabbro intrudes other volcanic rock units of the Finger Bay Volcanics. Two samples were collected, one gabbro, the other siliceous andesite(?) containing quartz phenocrysts(?) and sulfide minerals. The andesite is cut by thin stringers of quartz and some fracture/cleavage surfaces are coated with sulfide minerals. The gabbro is coarse-grained and sulfide mineral-bearing. The mineralization is thought to be associated with hydrothermal remobilization along the contact. | |
| Geologic map unit | (-176.609366876637, 51.8269224811058) |
|---|---|
| Age of mineralization | Tertiary. |
| Alteration of deposit | Silicification of volcanic rocks and minor introduction of chlorite. |
| Workings or exploration | Two samples collected during U.S. Geological Survey field work in 1993. Sample 93AWs 101 (gabbro) contained 730 ppm Cu, 0.27 ppm Ag, and 4 ppb Au. Sample 93TL 101 (andesite) contained 2 ppb Au, and 150 ppm Cu (unpublished data, U.S. Geological Survey, 1994). |
|---|---|
| Indication of production | None |
| MRDS Number | A106037 |
|---|---|
| Reporters | F.H. Wilson, T.D. Light |
| Last report date | 2/22/1996 |