Unnamed Occurrence (ARDF - UG005; near Kilokak Creek), Kodiak Island Borough, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - UG005; near Kilokak Creek)	- not defined -
Kodiak Island Borough	Borough
Alaska	State
USA	Country

This site is located on land selected by the Koniag Native Corporation.
Location: This occurrence is located near Kilokak Creek on Cape Kilokak north of triangulation point Imuya in T. 35 S., R. 44 W., of the Seward Meridian (MacKevett and Holloway, 1977, locality 13; Nokleberg and others,1987, locality AP 15). The site location is accurate to within 3 miles.
Geology: At this site sedimentary rocks of the Cretaceous Hoodoo and Chignik Formations and Eocene Tolstoi Formation are cut by the northern part of the Pliocene Agripina batholith (Detterman and others, 1987). The batholith also intrudes sills, dikes, and volcanic rocks of Oligocene age. The occurrence is marked by a color anomaly, mostly in the sedimentary rocks, and by copper, gold, lead, molybdenum, tungsten, and zinc anomalies in stream sediments from Kilokak Creek (Church and others, 1989: B-1858). Tourmaline and barite have been found in panned concentrates from this drainage. Bear Creek Mining company examined and sampled the area in 1977 (Hedderly-Smith, 1977). Pyrite, in amounts of 2-3 percent, was the only sulfide mineral reported. Rock-chip sampling indicated only low level metal anomalies. Except for localized silicification, little alteration was found. Nokleberg and others (1987) describe a zone of alteration and sparse veining within a black shale member of the Hoodoo Formation. The veins are anomalous in lead and zinc. They also report an unaltered andesite plug (Oligocene?) which is surrounded by an extensive zone of disseminated pyrite in the surrounding sedimentary rocks.
Workings: A stream-sediment geochemical survey was done here by Resource Associates of Alaska in 1975. Bear Creek Mining Company mapped and sampled the prospect in 1977 (Hedderly-Smith, 1977). The U.S. Geological Survey geochemically sampled the stream-sediments in the 1980's (Church and others, 1989: B-1858). Anomalous values of copper, gold, lead, molybdenum, tungsten and zinc were reported.
Age: Tertiary or younger.
Alteration: The rocks exhibit only localized silicification.

Commodities (Major) - Pb, Zn; (Minor) - Au?, Cu?, Mo?
Development Status: None
Deposit Model: Polymetallic vein? (Cox and Singer, 1986; model 22c)

Other Databases

Link to USGS - Alaska:	UG005

Other Regions, Features and Areas containing this locality

References