Unnamed (on northern Nagai Island)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Pb; Zn

Geographic location

Quadrangle map, 1:250,000-scale SB
Quadrangle map, 1:63,360-scale B-6
Latitude 55.26
Longitude -159.901
Nearby scientific data Find additional scientific data near this location
Location and accuracy The map site of this occurrence is at an elevation of 200 feet, on Nagai Island approximately 2.5 miles south-southwest of Cape Wedge. It is referred to as SBRGX-40 in Wilson and others (1988, locality 14). The location is accurate to within 2,500 feet.

Geologic setting

Geologic description

This occurrence is in interbedded siltstone and sandstone in the Lower Cretaceous Shumagin Formation near a contact with a dike or outlier of the Shumagin Batholith (Wilson and others, 1995). Anomalous values in lead and zinc have been reported in the sedimentary rock (Wilson and others, 1988).
Geologic map unit (-159.903090550864, 55.2591824782488)

Production and reserves

Workings or exploration Rock sample 84ADt177, collected by the U.S. Geological Survey in the mid-1980s, was reported to be anomalous in lead and zinc (Wilson and others, 1988).
Indication of production None

Additional comments

This occurrence is located on land selected by the Aleut corporation.