Unnamed (on Kupreanof Peninsula)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag

Geographic location

Quadrangle map, 1:250,000-scale SB
Quadrangle map, 1:63,360-scale C-5
Latitude 55.73
Longitude -159.62
Nearby scientific data Find additional scientific data near this location
Location and accuracy This site is located on Kupreanof Peninsula approximately 2.55 miles east-southeast of Pad Island and 1.5 miles northeast of Island Bay. It is referred to as SBRGX-42 in Wilson and others (1988, locality 16). The location is accurate to within 2 miles.

Geologic setting

Geologic description

This occurrence is in porphyritic dacite that is part of an undivided sequence of late Miocene volcanic rocks (Wilson and others, 1988, 1995). Potassium-argon dating of hornblende in the dacite gave an age of approximately 10 million years (Wilson and others, 1994). One sample collected by the U.S. Geological Survey was reported to contain anomalous values in silver (Wilson and others, 1988).
Geologic map unit (-159.622112685469, 55.7291914684828)

Production and reserves

Workings or exploration Rock sample 83ACe52 collected by the U.S. Geological Survey in the mid-1980s, was reported to be anomalous in silver (Wilson and others, 1988).
Indication of production None

Additional comments

This site is in the Alaska Peninsula National Wildlife Refuge, near land selected by the Aleut corporation.