Unnamed (on Lincoln Island)

Prospect, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals pyrite; pyrrhotite

Geographic location

Quadrangle map, 1:250,000-scale JU
Quadrangle map, 1:63,360-scale C-4
Latitude 58.5145
Longitude -135.0233
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is near the northern tip of Lincoln Island at an elevation of about 300 feet. It is in the SW1/4 section 4, T. 39 S., R. 63 E. of the Copper River Meridian. The location is accurate within 1/4 mile.

Geologic setting

Geologic description

The country rocks are a sequence of chert, tuff, argillite and mafic volcanic rocks, presumably of Late Jurassic or Cretaceous age (Gehrels and Berg, 1994). All of the rocks contain varying amounts of disseminated sulfides, chiefly pyrite or pyrrhotite. The U.S. Bureau of Mines conducted limited ground geophysics in 1986 and noted good conductivity related to the exposure. U.S. Bureau of Mines samples contained up to 1,900 ppm copper (Clough and Hayden, 1988). Wells and others (1986) noted claims at this site in 1956.
Geologic map unit (-135.02510226351, 58.5141696565459)

Production and reserves

Workings or exploration Surface sampling and limited geophysics.
Indication of production None



Reporters J.C. Barnett and L.D. Miller (Juneau, Alaska )
Last report date 12/15/2001