Unnamed (near Hag Peak on Kupreanof Peninsula)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Pb; Zn
Other commodities As; Bi
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SB
Quadrangle map, 1:63,360-scale C-5
Latitude 55.7
Longitude -159.54
Nearby scientific data Find additional scientific data near this location
Location and accuracy The map site of this occurrence is at an elevation of about 500 feet on Kupreanof Peninsula, about 0.4 mile north of Hag Peak. It is referred to as SBRGX-41 in Wilson and others (1988, locality 15). The location is accurate to within 1 mile.

Geologic setting

Geologic description

This occurrence is in bedded rocks of the Paleocene to Eocene Stepovak Bay Formation, near a small diorite or quartz diorite intrusion (Wilson and others, 1995). Wilson and others (1988) describe altered volcanic andesitic(?) breccia cut by a series of N 70 E-trending vertical shear zones. Some of the shears contain mineralized quartz veins. Alteration appears along shears and extends for approximately 600 feet along the beach east of the map site (Wilson and others, 1988). Rock samples collected by the U.S. Geological Survey in the mid-1980s were reported to be anomalous in silver, lead, zinc, arsenic, and bismuth (Angeloni and others, 1985; Wilson and others, 1988).
Geologic map unit (-159.542117314168, 55.699194936845)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c)
Mineral deposit model number 22c
Age of mineralization Tertiary.
Alteration of deposit Alteration consists of pink to tan bleaching of originally dark-green andesitic(?) breccia.

Production and reserves

Workings or exploration Rock samples 83AWs85 and 83AWs86 collected by the U.S. Geological Survey in the mid-1980s were reported to be anomalous in silver, lead, zinc, arsenic, and bismuth (Angeloni and others, 1985; Wilson and others, 1988).
Indication of production None

Additional comments

The site is on the Alaska Peninsula National Wildlife Refuge.

References