Unnamed (near Klawock Lake)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Ba; Cu
Ore minerals pyrite

Geographic location

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 setting

Geologic description

This 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consists of several prominent orange- and yellow-stained exposures 225-300 feet long along roadcuts (D.J. Grybeck, unpublished field notes, 1984).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.

Production and reserves

Workings or exploration Only surface sampling by government geologist in outcrops beside the road.
Indication of production None

Additional comments

The Sealaska Corporation holds the subsurface rights to the land in the vicinity of this occurrence.