Unnamed (near Kilokak Creek)

Occurrence in Alaska, United States with commodities Lead, Zinc, Gold, Copper, Molybdenum

Geologic information

Identification information

Deposit ID 10308456
Record type Site
Current site name Unnamed (near Kilokak Creek)

Geographic coordinates

Geographic coordinates: -156.40248, 57.19934 (WGS84)
Relative position 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.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Lead Primary
Zinc Primary
Gold Secondary
Copper Secondary
Molybdenum Secondary

Materials information

Materials Type of material
Galena Ore
Pyrite Ore
Sphalerite Ore
Barite Gangue
Quartz Gangue
Tourmaline Gangue

Alteration

  • (Local) The rocks exhibit only localized silicification.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -156.40248, 57.19934

Comments on the geologic information

  • 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.
  • Age = Tertiary or younger.

Economic information

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Alaska Peninsula

Comments on the workings information

  • 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.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF UG005

Bibliographic references

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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).

  • 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.

Comments on the references

  • Primary Reference = Hedderly-Smith, 1977

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein? (Cox and Singer, 1986; model 22c)
Deposit Other Comments = This site is located on land selected by the Koniag Native Corporation.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-00 S.H. Pilcher U.S. Geological Survey