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Kijik Lake

Occurrence in Alaska, United States with commodities Copper, Silver, Zinc
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Geologic information

Identification information

Deposit ID 10002137
MRDS ID A013028
Record type Site
Current site name Kijik Lake
Alternate or previous names Thompson

Geographic coordinates

Geographic coordinates: -154.38267, 60.33943 (WGS84)
Relative position Nearly 5.0 km N-NW of Kijik Lake. Locality 17 of Nelson and others (1985) and locality 25 of MacKevett and Holloway (1977). Sec. 18, T. 3 N., R. 29 W., of the Seward Meridian. Locality accurate within 1.6 km.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Silver Secondary
Zinc Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore

Alteration

  • (Local) Biotite, chloritic, and strong silicic alteration of the dacite.

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4

Host and associated rocks

  • Host or associated Host
    Chronological age 59.45
    Uncertainty 3.25
    Dating method K-Ar
    Stratigraphic age (youngest) Paleocene
    Chronological age 62.7
    Dating method K-Ar
    Stratigraphic age (youngest) Paleocene

Nearby scientific data

(1) -154.38267, 60.33943
ListMap

Comments on the geologic information

  • Geologic Description = The anomaly occurs in a structural zone where biotitic, chloritic, and strong silicic alterated dacite porphyry and breccia have been mineralized by 1 percent to 3 percent pyrite and traces of chalcopyrite (?) (Nelson and others, 1983; unit Tv). Mineralization spreads out along a NW-SE fault; possible breccia pipe or intrusive plug localized by the NW-SE fault. Analysis of rock sample yielded 5.8 ppm Ag, 180 ppm Cu, and 275 ppm Zn. Potassium-argon ages for this unit (Tv) range from 56.2 to 62.7 m.y. indicating a Tertiary age for these rocks (Eakins and others, 1978).
  • Age = Tertiary or younger; potassium-argon ages for the volcanic rocks range from 56.2 to 62.7 m.y. (Eakins and others, 1978).
  • Age = Chron age is for Host Rock.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Bristol Bay

Comments on the production information

  • Production Notes = No production

Comments on the reserve resource information

  • Reserves = No reserves

Comments on the workings information

  • Workings / Exploration = Analysis of rock sample yielded 5.8 ppm Ag, 180 ppm Cu, and 275 ppm Zn.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A013028
USGS Alaska Resource Data File ARDF LC032

Bibliographic references

  • Deposit

    Cobb, E.H., 1972, Metallic mineral map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-378, 1 sheet, scale 1:250,000.

  • Deposit

    Resource Associates of Alaska, Inc., 1976, Geology and geochemistry of certain land within the Lake Clark National Park: Contract report for U.S. Bureau of Mines, 109 p.

  • Deposit

    Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska - Supplement to Open-File Report 76-485: U.S. Geological Survey Open-File Report 81-1343-A, 25 p.

  • Deposit

    Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska - Supplement to Open-File Report 76-485: U.S. Geological Survey Open-File Report 81-1343-B, 20 p.

  • 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 = Nelson and others, 1985

General comments

Subject category Comment text
Deposit Model Name = Porphyry Cu ? (Cox and Singer, 1986; model 17 ?)
Deposit Other Comments = Overall, anomaly is weak. This may also be locality 2 of Mackevett and Holloway (1977) which corresponds with the Thompson prospects, 2 and 3, of Cobb (1972). Site is in Lake Clark National Park and Preserve.

Reporter information

Type Date Name Affiliation Comment
Reporter 15-JUN-1998 M.L. Miller U.S. Geological Survey
Reporter 15-JUN-1998 D.P. Bickerstaff U.S. Geological Survey