Hayes Glacier East Prospect, Delta River Mining District, Southeast Fairbanks Census Area, Alaska, USAi

Regional Level Types
Hayes Glacier East Prospect	Prospect
Delta River Mining District	Mining District
Southeast Fairbanks Census Area	Census Area
Alaska	State
USA	Country

Location: This prospect is at an elevation of about 4,350 feet, south of the terminus of Hayes Glacier about a half-mile northeast of peak 4990. The prospect is in the NW1/4NE1/4 section 22, T. 14 S., R. 6 E., Fairbanks Meridian. The location corresponds to locality N7 in table 2 of Nokleberg and others (1991) and is accurate within one-quarter mile.
Geology: The rocks at the Hayes Glacier East prospect consist of complexly deformed chlorite and talc-schist of Devonian age (Nokleberg and others, 1991; Lange and others, 1993). Mineralized rock sampled during a U.S. Geological Survey reconnaissance in the 1980's consisted of disseminated to semimassive pyrite, chalcopyrite, galena, sphalerite, and pyrrhotite in chlorite-epidote-carbonate schist (Nokleberg and others, 1991). Grab sample 82IL064B of copper-rich schist contained 0.92 percent copper, 0.22 percent zinc, 0.06 percent lead, and 10 parts per million silver (Nokleberg and others, 1991).
Workings: No substantial work has been done at the prospect. A grab sample collected by Nokleberg and others (1991) contained 0.92 percent copper, but American Copper and Nickel Company geologists subsequently concluded that, in general, the deposit is poor in valuable metals and consists mostly of pyrrhotite (W.T. Ellis, unpublished data, 1993).
Age: Devonian, the age of the host schist.

Commodities (Major) - Cu, Zn; (Minor) - Ag, Pb
Development Status: None
Deposit Model: Kuroko massive sulfide (Cox and Singer, 1986; model 28a).

Other Databases

Link to USGS - Alaska:	MH008

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References