Whalen and Nelson

Prospect, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; pyrrhotite

Geographic location

Quadrangle map, 1:250,000-scale CV
Quadrangle map, 1:63,360-scale D-6
Latitude 60.81
Longitude -146.146
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 900 feet about 1.5 miles east-southeast of the head of Whalen Bay. It is in the SE1/4 sec. 20, T. 12 S., R. 5 W., of the Copper River Meridian. The location is accurate within 1000 ft. This prospect is site C-59 in Jansons and others (1984) and #22 in Cobb (1972: MF-392).

Geologic setting

Geologic description

The country rock at this prospect is graywacke and slate of the Tertiary Orca Group (Nelson and others, 1985). Grant and Higgins (1909) reported a resistant band of nonslaty rock containing irregular stringers and disseminated grains of chalcopyrite and pyrrhotite. The band is up to 12 ft. wide, averages 2-4 feet wide, and is traceable for a 'considerable' distance.
Geologic map unit (-146.147998108792, 60.8094781907719)
Mineral deposit model Besshi massive sulfide? (Cox and Singer, 1986; model 24b?).
Mineral deposit model number 24b?
Age of mineralization Probably Tertiary based on the age of the host rocks.

Production and reserves

Workings or exploration One adit and surface stripping reported by Grant and Higgins (1909). Site could not be found in the 1980s (Jansons and others, 1984).
Indication of production None

Additional comments

Crowe and others (1992; 1993) and Sainsbury (1993) discuss the genesis of the volcanogenic massive sulfide deposits in this area.
The prospect is in the Chugach National Forest.

References

MRDS Number 10307372

References

Sainsbury, C.L., 1993, Geology and geochemistry of volcanogenic massive sulfide deposits and related igneous rocks, Prince William Sound, south-central Alaska, A discussion: Economic Geology, v. 88, p. 1284-1285.
Reporters S.W. Nelson, Anchorage, AK
Last report date 6/10/2000