Unnamed (coast, southeast of William Henry Bay)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; Cu
Other commodities Co
Ore minerals pyrite
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale JU
Quadrangle map, 1:63,360-scale C-4
Latitude 58.7097
Longitude -135.2199
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the west shore of Lynn Canal on the peninsula separating William Henry Bay from Lynn Canal. It is located in the NE1/4 section 34, T. 36 S., R. 61 E. of the Copper River Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence consists of a pyrite-bearing quartz-calcite vein in greenstone. The vein strikes NW and dips 70 NW, and is conformable to the foliation of the greenstone metavolcanic unit that hosts it. A sample of the quartz-calcite vein contained 2.7 ppm gold, 2,500 ppm copper, and 200 ppm cobalt. A sample of the greenstone contained 0.15 ppm gold, and 550 ppm copper (Clough and Redman, 1989). The general area is underlain by metamorphosed Silurian and Devonian clastic rocks, limestone, and volcanic units; Permian limestone and siltstone; and small plutons of Tertiary and Cretaceous granodiorite (Brew and Ford, 1985).
Geologic map unit (-135.221712574368, 58.7093699858926)

Production and reserves

Workings or exploration Surface sampling only.
Indication of production None