Cleopatra Prospect, Valdez Creek Mining District, Southeast Fairbanks Census Area, Alaska, USAi

Regional Level Types
Cleopatra Prospect	Prospect
Valdez Creek Mining District	Mining District
Southeast Fairbanks Census Area	Census Area
Alaska	State
USA	Country

Location: The Cleopatra prospect is at an elevation of about 4,500 feet on the north wall of an east-flowing, unnamed tributary to the West Fork Glacier. It is about 1.6 miles south-southwest of VABM 5,756 (Fork), in the NW1/4 of sec. 5, T. 17 S., R. 1 E., of the Fairbanks Meridian. The location is accurate to within 0.5 mile. This is location 25 of Cox and others (1989).
Geology: The country rocks in the area of the Cleopatra prospect include Upper Triassic, intensely deformed and metamorphosed, interbedded shale, argillite, sandstone, siltstone, and argillaceous limestone; and dikes, sills, and small plugs of altered diabase and gabbro (Wilson and others, 1998). These rocks in turn are intruded by Upper Cretaceous(?) and Lower Tertiary granite plutons. The deposit consists of stratabound disseminated chalcopyrite and pyrrhotite in the metasedimentary rocks.
Workings: Rocks are stream-sediment sampling, ground EM and magnetic geophysical surveys were conducted in the mid-1970s (unpublished report for the New Alaska Syndicate, 1977).
Age: The disseminated sulfides are probably syngenetic with their Late Triassic host rocks.
Alteration: The rocks are strongly leached and altered to gossan at the surface.

Commodities (Major) - Cu
Development Status: None
Deposit Model: Besshi massive sulfide (Cox and Singer, 1986; model 24b)

Other Databases

Link to USGS - Alaska:	HE115

Other Regions, Features and Areas containing this locality

References