Unnamed (near the head of Granite Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Fe
Other commodities Au
Ore minerals gold; magnetite

Geographic location

Quadrangle map, 1:250,000-scale GU
Quadrangle map, 1:63,360-scale D-1
Latitude 62.879
Longitude -144.079
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is at the head of Granite Creek near the west side of a small unnamed lake. It is approximately centered on the north-half of the boundary between sections 27 and 28, T. 12 N., R. 7 E., Copper River Meridian. The location is approximate but is within one-half mile.

Geologic setting

Geologic description

A magnetite skarn occurs in the head of Granite Creek in a region mainly composed of mixed dioritic rocks of Richter's Jurassic 'tectonic quartz-diorite unit' (Richter, 1966). Gold can be panned from the streams that drain the skarn (Kirk Stanley, written communication, 2000). The skarn is on the west side of the diorite complex (WGM Inc., 1979).
Geologic map unit (-144.081206147381, 62.8786114068657)
Mineral deposit model Iron skarn (Cox and Singer, 1986; model 18d)
Mineral deposit model number 18d
Age of mineralization Possibly associated with emplacement of Richter's (1966) Jurassic, quartz-diorite complex.

Production and reserves

Workings or exploration Only natural exposures examined during reconnaissance exploration.
Indication of production None

References

MRDS Number 10307486

References

WGM Inc., 1979, 1978 Annual Progress Report, Uranium Exploration, Ahtell Creek Area, Volume I: WGM Inc., 39 p., appendices, 4 maps. (Report available, Ahtna Mineral Co., Anchorage, Alaska).
Reporters W.T. Ellis (Alaska Earth Sciences), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (U.S. Geological Survey)
Last report date 12/6/2000