| Quadrangle map, 1:250,000-scale | CR |
|---|---|
| Quadrangle map, 1:63,360-scale | C-3 |
| Latitude | 55.51336 |
| Longitude | -132.95547 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | This occurrence consists of bright yellow- and orange-stained rocks in outcrops on the north side of the road from Hollis to Klawock; it is in the center of section 28, T. 73 S., R. 82 E. |
Geologic descriptionThis occurrence consists of several prominent orange- and yellow-stained exposures 225-300 feet long along roadcuts (D.J. Grybeck, unpublished field notes, 1984). The rocks consist of felsic to intermediate metamorphosed tuffs and and porphyritic intermediate volcanic rocks of the Luck Creek Breccia of Silurian and Ordovician age (Eberlein and others, 1983). The oxidized rocks locally contain several percent disseminated pyrite and display a little copper carbonate staining. Several chip samples across the exposures contained up to 2 parts per million (ppm) silver, 2,000 ppm barium, and 5,000 ppm copper. Several samples from similar bright orange and yellow outcrops along the road about two miles to the southeast had no significant metal values. | |
| Geologic map unit | (-132.957131347751, 55.5130096813377) |
|---|---|
| Mineral deposit model | Metalliferous, volcanogenic? layers in Silurian and Ordovician, metamorphosed volcanic and sedimentary rocks. |
| Alteration of deposit | The outcrops are are oxidized and brightly stained orange and yellow. |
| Workings or exploration | Only surface sampling by government geologist in outcrops beside the road. |
|---|---|
| Indication of production | None |
Additional commentsThe Sealaska Corporation holds the subsurface rights to the land in the vicinity of this occurrence. | |
References | |
| Reporters | D.J. Grybeck (Applied Geology) |
|---|---|
| Last report date | 5/1/2004 |