Portage Pass

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-5
Latitude 60.7678
Longitude -148.7812
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the north side of Portage Pass in the E1/2 section 20, T. 8 N., R. 4 E., of the Seward Meridian. This is location 145 of Cobb and Tysdal (1980) and location S-181 of Jansons and others (1984). This location is accurate to within half a mile.

Geologic setting

Geologic description

This occurrence is known only as a copper lode discovered in 1912 (Johnson, 1916). No development is known to have been done on it. Mapping by Nelson and others (1985) indicates that the area is underlain by Valdez Group rocks of Late Cretaceous age. No further data is available.
Geologic map unit (-148.783338786417, 60.7672441729638)
Age of mineralization Cretaceous or younger, on the basis of the age of the country rock.

Production and reserves

Indication of production None