| Quadrangle map, 1:250,000-scale | AN |
|---|---|
| Quadrangle map, 1:63,360-scale | A-1 |
| Latitude | 61.06 |
| Longitude | -147.3 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | On south-facing slope near headwaters of the primary drainage into Wells Bay. NW1/4 sec. 10, T. 11 N., R. 12 E., of the Seward Meridian. Accurate within 3,000 ft. Locality A-6 of Jansons and others (1984). |
Geologic descriptionSandstone, siltstone, and mudstone of the Tertiary Orca Group cut by nine shear zones and a felsic dike. Shear zones are 1 to 20 ft wide and contain massive and disseminated pyrite, arsenopyrite, and galena (Jansons and others, 1984). Jansons and others (1984) reported five chip samples contained up to 1.1 percent Pb, 0.33 percent Cu, 10.6 ppm Ag and .53 percent As. Grab samples contained up to .5 percent Cu, 1.4 ppm Au, 9 ppm Ag, and 5.1 percent As. Chip sample across felsic dike contained 810 ppm As. | |
| Geologic map unit | (-147.302073633649, 61.0594556621711) |
|---|---|
| Age of mineralization | Paleocene or younger; shear zones and a felsic dike cut the sandstone, siltstone, and mudstone of the Tertiary Orca Group. |
| Workings or exploration | Jansons and others (1984) reported five chip samples contain up to 1.1 percent Pb, 0.33 percent Cu, 10.6 ppm Ag and .53 percent As. Grab samples contain up to .5 percent Cu, 1.4 ppm Au, 9 ppm Ag, and 5.1 percent As. Chip sample across felsic dike contained 810 ppm As. Potential for mineral development is low. |
|---|---|
| Indication of production | None |
| MRDS Number | A106206 |
|---|---|
| Reporters | D.P. Bickerstaff (USGS contractor); S.W. Huss (USGS) |
| Last report date | 7/30/1998 |