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Kontrashibuna (Lake)

Occurrence in Alaska, United States with commodities Molybdenum, Copper, Zinc
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10002112
MRDS ID A013002
Record type Site
Current site name Kontrashibuna (Lake)

Geographic coordinates

Geographic coordinates: -154.00264, 60.15943 (WGS84)
Relative position Locality is roughly 800 m south of Kontrashibuna Lake, 3.6 km E-SE of Kasna Creek. This is locality 32 of Nelson and others (1985), locality 33 of MacKevett and Holloway (1977), it roughly corresponds to locality 10 of Cobb (1972), and to Area H and approximately Area I of Eakins (1970). Sec. 20, T. 1 N., R. 27 W., of the Seward Meridian. Locality is accurate within 1,000 m.

Site location context

Political divisions (FIPS codes)

Lake and Peninsula(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lake Clark A-3(quadrangle 1:63,360 scale)

Lake Clark SE(quadrangle 1:100,000 scale)

Lake Clark C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lake Clark(hydrologic unit)

Kvichak-Port Heiden(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Lake Clark National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Molybdenum Primary
Copper Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Molybdenite Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) Unknown

Mineral occurrence model information

Model code 79
USGS model code 21a
Deposit model name Porphyry Cu-Mo
Mark3 model number 2
Model code 80
USGS model code 21b
Deposit model name Porphyry Mo, low-F

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite

Nearby scientific data

(1) -154.00264, 60.15943
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The occurrence consists of quartz-pyrite veins containing coarse molybdenite and other sulfide minerals, near the contact of Tertiary mafic volcanic rocks with an intruding Tertiary granitic body. The veins cut the volcanic rocks, but mineralization dies out when veins enter the nearby granite. Also, much iron-staining, gouge, and mylonite along a NE-trending fault. Eakins (1970, Area H) reports that sediment samples in the vicinity yielded values of up to 240 ppm Cu, 50 ppm Mo, 290 ppm Pb, and 980 ppm Zn. Area I of Eakins, 1.2 km NW of this location, produced stream sediment samples with values of up to 240 ppm Cu, 50 ppm Mo, and 440 ppm Pb. Eakins also reports a sample of molybdenite-bearing granite float. A rock sample from the NE-trending fault yielded 8.5 ppm Ag and 2,000 ppm Pb. Resource Associates of Alaska (1976) proposed that the geology may indicate a copper-molybdenum stockwork porphyry.
  • Age = Tertiary or younger.

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 = Eakins (1970, Area H) reports that sediment samples in the vicinity yielded values of up to 240 ppm Cu, 50 ppm Mo, 290 ppm Pb, and 980 ppm Zn. Area I of Eakins (1970), 1.2 km NW of this location, produced stream sediment samples with values of up to 240 ppm Cu, 50 ppm Mo, and 440 ppm Pb. Eakins also reports a sample of molybdenite-bearing granite float. A rock sample from the NE-trending fault yielded 8.5 ppm Ag and 2,000 ppm Pb.

Reference information

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., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-485.

  • 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-Mo? or Porphyry Mo, Low F ? (Cox and Singer, 1986; models 21a ? or 21b ?)
Deposit Other Comments = 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

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.