Unnamed (west of lower Ibeck Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Zn
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale CV
Quadrangle map, 1:63,360-scale C-4
Latitude 60.63
Longitude -145.437
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 2200 feet about a mile west of lower Ibeck Creek and 1/4 mile north of peak 2522. It is in the NE1/4 sec. 29, T. 14 S., R. 1 W., of the Copper River Meridian. Location accurate to within 1000 ft. Location corresponds to site C-18 in Jansons and others (1984).

Geologic setting

Geologic description

The occurrence is hosted in a unit of the Tertiary Orca Group consisting mostly of tabular or lenticular bodies of mafic volcanic rocks, including pillowed or massive flows, breccia and dikes (Nelson and others, 1985). Rocks in the area are iron-stained and contain disseminated pyrite. One grab sample contained 0.25% Zn (Jansons and others, 1984).
Geologic map unit (-145.438982856482, 60.6294630749467)
Mineral deposit model Possibly Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
Mineral deposit model number 24a ?
Age of mineralization Probably Tertiary based on the age of the host rocks.
Alteration of deposit Oxidation of sulfides.

Production and reserves

Workings or exploration
Site examined during U.S. Bureau of Mines mineral evaluation of the Chugach National Forest (Jansons and others, 1984).
One grab sample contained 0.25% Zn (Jansons and others, 1984).
Indication of production None

Additional comments

Chugach Alaska Corporation, Anchorage, Alaska has control of these lands.

References