Tok Antimony

Past Producer in Alaska, United States with commodity Antimony

Geologic information

Identification information

Deposit ID 10001756
MRDS ID A012543
Record type Site
Current site name Tok Antimony
Alternate or previous names Stibnite, A Lucky Leak, Gamblin, Caulk

Geographic coordinates

Geographic coordinates: -143.80266, 63.2497 (WGS84)
Relative position The deposit is located nearly at the foot of Stibnite Creek (formerly called Boulder Creek), in the SW 1/4 section 13, T. 17 N., R. 8 E., of the Copper River Meridian (Ebbley and Wright, 1948, p. 30). It is location 22 of Singer and others (1976).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Antimony Primary

Materials information

Materials Type of material
Pyrite Ore
Stibnite Ore
Calcite Gangue
Muscovite Gangue
Quartz Gangue

Alteration

  • (Local) Andesite Porphyry Is Intensely Altered To Quartz-Dolomite-Sericite

Mineral occurrence model information

Model code 180
USGS model code 27d
Deposit model name Simple Sb (veins, pods, etc)

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Stratigraphic age (youngest) Paleocene
  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -143.80266, 63.2497

Comments on the geologic information

  • Geologic Description = The Tok Antimony deposit, also called Boulder Creek, Stibnite, A Lucky Leak, and Stibnite Creek was discovered in the early 1900's. The mineralization at the prospect consists of a six-meter-wide fault zone that contains four types of stibnite ore: (1) coarse-grained, acicular stibnite in crystals up to 50 millimeters long associated with quartz, (2) fine-grained massive stibnite with interstitial quartz and minor pyrite, (3) mineralized breccia consisting of quartz and schist fragments in a matrix of quartz, calcite, muscovite, stibnite and pyrite, and (4) quartz-pyrite-stibnite stringers. The high-grade ore is concentrated along two well-defined fault planes as two distinct veins about 0.6 meter wide, separated by 1 to 2 meters of fractured and altered chlorite schist. Isolated pods of stibnite and pyrite-bearing quartz stringers less than 1 to 2 centimeters wide occur along minor faults within 30 meters of veins (Ebbley and Wright, 1948).? In 1940, several tons of ore from the prospect were stockpiled by Boulder Creek awaiting transport. All of it was washed away by the river and was never processed (Ebbley and Wright, 1948).

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Mining district

District name Tok

Comments on the production information

  • Production Notes = Several tons of high grade ore were stockpiled at the site in 1940, but were washed away by the river before it could be transported (Ebbley and Wright, 1948). There was some mining from an open cut with a bulldozer in 1976 (York, 1980).

Comments on the workings information

  • Workings / Exploration = A 12-foot adit was driven in 1914. In 1940, several tons of material were stockpiled and mined, but were washed away by the river before it could be transported from the deposit (Ebbley and Wright, 1948, p. 31).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012543
USGS Alaska Resource Data File ARDF TC029

Bibliographic references

  • Deposit

    Brooks, A.H., 1916, Antimony deposits of Alaska: U.S. Geological Survey Bulletin 649, 67 p.

  • Deposit

    Joesting, H.R., 1942, Strategic mineral occurences in interior Alaska: Alaska Territorial Department of Mines Pamphlet 1, 46 p.

  • Deposit

    Joesting, H.R., 1942, Antimony and tungsten deposits in Fairbanks and adjacent areas: Alaska Department of Mines MR 194-11, 25 p.

  • Deposit

    Moffit, F.H., 1944, Mining in the northern Copper River region, Alaska: U.S. Geological Survey Bulletin 943, p. 25-47.

  • Deposit

    Ebbley, N., and Wright, W.S., 1948, Antimony deposits in Alaska: U.S. Bureau of Mines Report of Investigations 4173, 41 p.

  • Deposit

    Cobb, E.H., and Kachadoorian, R., 1961, Index of metallic and non- metallic mineral deposits of Alaska compiled from published reports of federal and state agencies through 1957: U.S. Geological Survey Bulletin 1139, 336 p.

  • Deposit

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

  • Deposit

    Foster, H.L., 1970, Reconnaissance geologic map of the Tanacross quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geological Investigations Map I-593, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Tanacross quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-383, 1 sheet, scale 1: 250,000.

  • Deposit

    Foster, H.L., Albert, N.R.D., Barnes, D.F., Curtin, G.C., Griscom, Andrew, Singer, D.A., and Smith, J.G., 1976, The Alaskan Mineral Resources Assessment Program: Background information to accompany folio of geologic and mineral resource maps of the Tanacross quadrangle, Alaska: U.S. Geological Survey Circular 734, 23 p.

  • Deposit

    Singer, D.A., Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and discussion of the metalliferous and selected nonmetalliferous mineral resources of the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-file Report 78-588-Q, 33 p., 1 plate, scale 1:250,000.

  • Deposit

    Cobb, E.H., and Eberlein, G.D., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Big Delta and Tanacross quadrangles, Alaska: U.S. Geological Survey Open-File Report 80-1086, 77 p.

  • Deposit

    York, T.M., 1980, Geology of the Tok antimony mine, Tok, Alaska: Colorado School of Mines, Golden, M.Sc. thesis, 94 p.

  • Deposit

    Joesting, H.R., 1942, Antimony and tungsten deposits in the Fairbanks and adjacent districts: Alaska Department of Mines Miscellaneous Report 194-11, 25 p.

  • Deposit

    Moffit, F.H., 1938, Geology of the Slana-Tok district, Alaska: U.S. Geological Survey Bulletin 904, 54 p.

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.

Comments on the references

  • Primary Reference = Ebbley and Wright, 1948

General comments

Subject category Comment text
Deposit Model Name = Stibnite vein (Cox and Singer, 1986; model 27d)

Reporter information

Type Date Name Affiliation Comment
Reporter 13-APR-99 Cameron, C.E. Alaska Division of Geological and Geophysical Surveys