Unnamed (near Kilokak Creek)

The Unnamed (near Kilokak Creek) is a lead and zinc mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Unnamed (near Kilokak Creek)

Commodity

Primary: Lead
Primary: Zinc
Secondary: Molybdenum
Secondary: Copper
Secondary: Gold

Location

State: Alaska
District: Alaska Peninsula

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: The rocks exhibit only localized silicification.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Sphalerite
Ore: Pyrite
Ore: Galena
Gangue: Quartz
Gangue: Barite
Gangue: Tourmaline

Comments

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Hedderly-Smith, 1977

Comment (Deposit): Other Comments = This site is located on land selected by the Koniag Native Corporation.

Comment (Geology): Geologic Description = 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.

Comment (Workings): Workings / Exploration = 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.

Comment (Deposit): Model Name = Polymetallic vein? (Cox and Singer, 1986; model 22c)

Comment (Geology): Age = Tertiary or younger.

References

Reference (Deposit): Hedderly-Smith, D.A., 1977, 1977 Annual report, Alaska search, Koniag Inc. region: Bear Creek Mining Company, Spokane Office, 23 p. (Report held by Kennecott Alaska, Anchorage).

Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

Reference (Deposit): Detterman, R.L., Case, J.E., Wilson, F.H., and Yount, M.E., 1987, Geologic map of the Ugashik, Bristol Bay, and part of the Karluk quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-1685, 1 map sheet, scale 1:250,000.

Reference (Deposit): Church, S.E., Frisken J.G., Wilson, F.H., 1989, Interpretation of exploration geochemical data from Ugashik, Bristol Bay, and western Karluk quadrangles, Alaska: U.S Geological Survey Bulletin 1858, 45 p.

Reference (Deposit): Wilson, F.H., and Shew, N., 1992, Map and tables showing geochronology and whole rock geochemistry of selected samples from Ugashik, Bristol Bay, and part of Karluk quadrangle, Alaska: U.S. Geological Survey Map MF-1539-E, 34 p., 1 map sheet, scale 1:250,000.

Reference (Deposit): Nokleberg, W.J., Bundtzen, T.K., Berg, H.C., Brew, D.A., Grybeck, D.J., Robinson, M.S., Smith, T.E., and Yeend, W., 1987, Significant metalliferous lode deposits and placer districts of Alaska: U.S. Geological Survey Bulletin 1786, 104 p.

Reference (Deposit): Church, S.E., Detterman, R.L., and Wilson, F.H., 1989, Mineral and energy resource assessment maps of the Ugashik, Bristol Bay, and western Karluk quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF 1539-I, 2 map sheets, scale 1:250,000.

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