Kahiltna River

Past Producer in Alaska, United States with commodities Gold, Platinum, REE, Tin, Thorium, Titanium, Uranium, Tungsten, Zirconium

Geologic information

Identification information

Deposit ID 10111308
MRDS ID A011829
Record type Site
Current site name Kahiltna River
Related records 10185991

Geographic coordinates

Geographic coordinates: -150.75274, 61.98953 (WGS84)
Relative position Carnes (1976, locality 4) defines this placer prospect as covering approximately a four and one-half mile stretch along the Kahiltna River centered at about the middle of the boundary between Sections 21 and 16 in T. 22., R. 18 W. (Cobb, 1972, MF 385, locality 7 and U.S. Bureau of Mines 1973, localities 22, 39, and 59). This site is on upstream extention of the placer site along the same river described in ARDF TY028.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Platinum Secondary
REE Secondary
Tin Secondary
Thorium Secondary
Titanium Secondary
Uranium Secondary
Tungsten Secondary
Zirconium Secondary

Comments on the commodity information

  • Ore Material = uranothorianite

Materials information

Materials Type of material
Cassiterite Ore
Gold Ore
Monazite Ore
Platinum Ore
Rutile Ore
Scheelite Ore
Garnet Gangue
Hematite Gangue
Ilmenite Gangue
Magnetite Gangue
Quartz Gangue
Sphene Gangue
Tourmaline Gangue
Zircon Gangue

Mineral occurrence model information

Model code 119
USGS model code 39a
BC deposit profile C01. C02
Deposit model name Placer Au-PGE
Mark3 model number 54

Nearby scientific data

(1) -150.75274, 61.98953

Comments on the geologic information

  • Geologic Description = Quaternary gravels reconcentrated from Tertiary continental rock, glacial deposits or older bedrock to the north in the Talkeetna quadrangle. Samples are reported to contain up to 0.08% uranium and 0.03% thorium (Cobb,1979, OFR 80-86. p. 17). Probably some small production prior to 1919. Drilling for possible dredging was done in the early 1900's. Limited prospecting may have been done more recently.
  • Age = Quaternary

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Yentna

Comments on the workings information

  • Workings / Exploration = Drilling for possible dredging was done in the early 1900's. Limited prospecting may have been done more recently.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011829
USGS Alaska Resource Data File ARDF TY027

Bibliographic references

  • Deposit

    Smith, P.S., 1930, Mineral industry of Alaska in 1928: U.S. Geological Survey Bulletin 813, p. 1-72.

  • Deposit

    Bates, R.G. and Wedow, H. Jr., 1953, Preliminary summary review of thorium-bearing mineral occurrences in Alaska: U.S. Geological Survey Circular 202, 13 p.

  • Deposit

    Overstreet, W.C., 1967, The geologic occurrence of monazite: U.S. Geological Survey Professional Paper 530, 327 p.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Tyonek quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-385, 1:250,000 scale.

  • Deposit

    U.S. Bureau of Mines, 1973, Alaska 1:250,000-scale quadrangle map overlays showing mineral deposit locations, principal minerals, and number and type of claims: U.S. Bureau of Mines Open-File Report 20-73, 95 overlays (updated in 1986, 1987).

  • Deposit

    Carnes, D.R., 1976, Active Alaskan placer operations, 1975: U.S. Bureau of Mines Open-File Report 98-76, 90 p., 40 maps.

  • 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.

  • Deposit

    Cobb, E.H., 1979, Summary of references to mineral occurrences (other than minerals fuels and construction materials) in the Kenai and Tyonek Quadrangles, Alaska: U.S. Geological Survey Open-File Report 80-86, 36 p.

  • Deposit

    Mertie, J.B., Jr., 1919, Platinum-bearing gold placers of the Kahiltna Valley: U.S. Geological Survey Bulletin 692-D, p. 233-264.

  • Deposit

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

Comments on the references

  • Primary Reference = Cobb, 1979 (OFR 80-86)

General comments

Subject category Comment text
Deposit Model Name = Placer gold (Cox and Singer, 1986; model 39a)
Deposit Other Comments = See other Kahiltna River occurrences in the Tyonek Quadrangle (ARDF numbers TY028 and TY029) and to the north in the Talkeetna Quadrangle.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1998 Madelyn A. Millholland Millholland & Associates
Reporter 01-JUN-1998 James Riehle U.S. Geological Survey