Four-in-One

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu; Ni
Ore minerals chalcopyrite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale AN
Quadrangle map, 1:63,360-scale A-1
Latitude 61.09
Longitude -147.29
Nearby scientific data Find additional scientific data near this location
Location and accuracy Prospect is on the north-facing slope above the eastern tributary of Miners River, about 1.1 miles west of Kadin Lake. Accurate within 1 mile. Locality A-8 of Jansons and others (1984) and locality 72 of Hoekzema (1984).

Geologic setting

Geologic description

Two mineralized shear zones in conglomerate of the Early Tertiary Orca Group range from 5 to 100 ft wide and contain sulfide veinlets and pods of chalcopyrite and pyrite. Five chip samples contained from 20 ppm to 3 percent Cu and 2.6 to 46 ppm Ag. Four grab samples contained from 195 ppm to 0.94 percent Cu, 2.7 to 8.8 ppm Ag, and 9 ppm to 0.18 percent Ni (Jansons and others, 1984).
Geologic map unit (-147.292075056424, 61.0894541403837)
Age of mineralization Paleocene or younger based on the age of the bedrock.

Production and reserves

Workings or exploration According to Jansons and others (1984), a 60 ft adit and open pits were present. The U.S. Bureau of Mines (Jansons and others, 1984) reported five chip samples contained from 20 ppm to 3 percent Cu and 2.6 to 46 ppm Ag. Four grab samples contained from 195 ppm to 0.94 percent Cu, 2.7 to 8.8 ppm Ag, and 9 ppm to 0.18 percent Ni. The potential for mineral development is low.
Indication of production None
Reserve estimates Hoekzema (1984) reported that the inferred reserves are 33,500 tons at 0.22 percent Cu and 21.2 ppm Ag. The potential for mineral development is low.

References

MRDS Number A106202
Reporters D.P. Bickerstaff (USGS contractor); S.W. Huss (USGS)
Last report date 7/30/1998