Guthrie

Prospect, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals bornite; chalcopyrite
Gangue minerals calcite; epidote; quartz

Geographic location

Quadrangle map, 1:250,000-scale VA
Quadrangle map, 1:63,360-scale C-1
Latitude 61.6531
Longitude -144.1263
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is located east of Deception Creek and north of Elliott Creek; it is at an elevation of about 4,100 feet in the NW1/4 section 34, T. 2 S., R. 7 E., of the Copper River Meridian. This prospect is approximately located, perhaps to within one-half mile. It is included in locality 64 of Cobb and Matson (1972) and locality 54 of Winkler and others (1981). It is immediately northeast and adjacent to the Albert Johnson claim (VA034).

Geologic setting

Geologic description

Triassic Nikolai Greenstone is shattered and cut by small veinlets containing bornite and chalcopyrite (Moffit and Mertie, 1923). At the adjacent Albert Johnson prospect (VA034), bornite, chalcopyrite, and some native copper occur in small sheeted veins and replacement deposits in fractured Triassic Nikolai Greenstone (Moffit, 1918, p. 156-157). Gangue minerals in the veins are commonly calcite, epidote, and quartz. The Nikolai Greenstone and overlying Chitistone Limestone are deformed into a large, asymmetric anticline with its axis approximately parallel to Elliott Creek. The copper mineralization is believed to be related to the regional mineralizing event that produced the rich Kennecott copper deposits in the McCarthy quadrangle (MacKevett and others, 1997).
Geologic map unit (-144.128395530173, 61.6526325823223)
Mineral deposit model Veins, disseminations, and fracture fillings in greenstone; probably related to Kennecott-type copper deposits (MacKevett and others, 1997)
Age of mineralization The copper mineralization is believed to be related to the mineralizing event that produced the rich Kennecott copper deposits in the McCarthy quadrangle to the east (MacKevett and others, 1997). This event is interpreted to have accompanied Late Jurassic or Early Cretaceous deformation and metamorphism (MacKevett and others, 1997, p. 88).

Production and reserves

Workings or exploration This prospect was explored with an adit and probably some open cuts.
Indication of production None

Additional comments

This prospect is within the Wrangell-St. Elias National Park.

References

MRDS Number A011504

References

Reporters Travis L. Hudson
Last report date 12/14/2001