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Kolmakof

Past Producer in Alaska, United States with commodity Mercury
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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 10002486
MRDS ID A013423
Record type Site
Current site name Kolmakof
Related records 10233584

Geographic coordinates

Geographic coordinates: -158.90287, 61.59936 (WGS84)
Relative position Location uncertain; may be in eastern Russian Mission quadrangle (Miller and others, 1989).

Site location context

Political divisions (FIPS codes)

Bethel(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sleetmute C-8(quadrangle 1:63,360 scale)

Sleetmute NW(quadrangle 1:100,000 scale)

Sleetmute(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Aniak(hydrologic unit)

Lower Kuskokwim River(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Kuskokwim Corporation(ANCSA Village)

ANCSA Village NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Mercury Primary

Materials information

Materials Type of material
Cinnabar Ore
Quartz Gangue

Alteration

  • (Local) Sills and dikes altered to silica-carbonate rock

Mineral occurrence model information

Model code 178
USGS model code 27b
Deposit model name Almaden Hg

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
    Rock unit name Kuskokwim Group;Kuskokwim Group;
    Rock description Kuskokwim Group;Kuskokwim Group;

Nearby scientific data

(1) -158.90287, 61.59936
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Interbedded graywacke and shale of the Kuskokwim Group are intruded by numerous sills and a few dikes. The largest sill reported to be 25-30 ft thick and exposed over a horizontal distance of 400 ft. Cinnabar occurs in narrow stringers and as disseminations in fractures and brecciated zones in the sill and enclosing rocks.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Aniak

Comments on the production information

  • Production Notes = A little more than 2 flasks Hg was produced by 1910.

Comments on the workings information

  • Workings / Exploration = One adit (now caved), one shaft (destroyed by dozer cut), one 80-ft-deep inclined shaft (now flooded), 29 trenches and open cuts totaling 600 ft in length over strike length of 350 ft (trenches now sloughed in), 10 survey lines of auger holes.

Reference information

Bibliographic references

  • Deposit

    Smith, P.S., and Maddren, A.G., 1915, Quicksilver deposits of the Kuskokwim region, in Brooks, A.H., and others, Mineral resources of Alaska, Report on progress of investigations in 1914: U.S. Geological Survey Bulletin 622, p. 272-291.

  • Deposit

    Cady, W.M., Wallace, R.E., Hoare, J.M., and Webber, E.J., 1955, The central Kuskokwim region, Alaska: U.S. Geological Survey Professional Paper 268, 132 p.

  • Deposit

    Jasper, M.W., 1961, Cinnabar province, Kuskokwim region: Alaska Division of Mines and Minerals, Report for the Year 1961, p. 65-79.

  • Deposit

    Sainsbury, C.L. and MacKevett, E.M., Jr., 1965, Quicksilver deposits of southwestern Alaska: U.S. Geological Survey Bulletin 1187, 89 p.

  • Deposit

    Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Sleetmute quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-368, scale 1:250,000.

  • Deposit

    Merrill, C.W., and Maloney, R.P., 1974, Kolmakof mercury deposits: U.S. Bureau of Mines Open-File Report 21-75, 21 p.

  • Deposit

    Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Dillingham, Sleetmute, and Taylor Mountain quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-606, 92 p.

  • Deposit

    Meyer, M.P., 1985, Mineral investigation of the Iditarod-George planning block, central Kuskokwim River area, Alaska: U.S. Bureau of Mines Open-File Report 9-85, 232 p., 4 sheets, scale 1:250,000.

  • Deposit

    Rytuba, J.J., 1986, Descriptive model of Almaden Hg, in Cox, D.P., and Singer, D.A., eds. Mineral Deposit Models: U.S. Geological Survey Bulletin 1693, p. 180.

  • Deposit

    Miller, M.L., Belkin, H.E., Blodgett, R.B., Bundtzen, T.K., Cady, J.W., Goldfarb, R.J., Gray, J.E., McGimsey, R.G., and Simpson, S.L., 1989, Pre-field study and mineral resource assessment of the Sleetmute quadrangle, southwestern Alaska: U.S. Geological Survey Open-File Report 89-363, 115 p., 3 plates, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Dillingham, Sleetmute, and Taylor Mountains quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-606, 92 p.

  • Deposit

    Jasper, Martin, 1961, Cinnabar province, Kuskokwim region, in Williams, J.A., Report of the Alaska Division of Mines and Minerals Report for the Year 1961: Alaska Division of Mines and Minerals Annual Report, p. 65-79.

Comments on the references

  • Primary Reference = Miller and others (1989), summarizes other references

General comments

Subject category Comment text
Deposit Model Name = Epithermal vein and disseminated, mercury
Deposit Other Comments = Trenching and stream panning by USBM indicates a possibility of significant cinnabar mineralization in immediate area around mine, although not necessarily connected or associated with present mine. Drilling program by USBM in 1969-70 was not successful, due to heavy overburden.

Reporter information

Type Date Name Affiliation Comment
Reporter 02-JUN-94 Huber, D.F. U.S. Geological Survey
Reporter 02-JUN-94 Niles, L.P. U.S. Geological Survey
Reporter 02-JUN-94 Miller, M.L. 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.