Unnamed (head of Dead Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Ore minerals malachite; pyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale CV
Quadrangle map, 1:63,360-scale D-5
Latitude 60.91
Longitude -145.87
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 2400 feet at the northeastern head of Dead Creek, near the toe of an unnamed glacier. It is in the W1/2 sec. 13, T. 11 S., R. 4 W., of the Copper River Meridian. The accuracy of the location is within 2000 ft. This occurrence is shown as site C-57 in Jansons and other (1984).

Geologic setting

Geologic description

The country rocks at this occurrence are slate and graywacke of the Upper Cretaceous Valdez Group (Nelson and others, 1985). Jansons and others (1984) describe a 4-foot-wide shear zone in the slate and graywacke that contins a foot-wide zone of pyrite, sphalerite, and malachite. One chip sample contained 41 ppm Zn, and 7 ppm Cu, and a grab sample contained 1.23 percent Zn and 0.17 percent Cu.
Geologic map unit (-145.87198877113, 60.9094723995143)
Alteration of deposit Minor oxidation of copper minerals.

Production and reserves

Workings or exploration
Site examined as part of a U.S. Bureau of Mines and U.S.G.S. mineral evaluation of the Chugach National Forest.
One chip sample contained 41 ppm Zn, and 7 ppm Cu, and a grab sample contained 1.23 percent Zn and 0.17 percent Cu (Jansons and others, 1984).
Indication of production None

References