Niukluk River

Past Producer in Alaska, United States with commodity Gold

Geologic information

Identification information

Deposit ID 10001817
MRDS ID A012627
Record type Site
Current site name Niukluk River
Related records 10112324

Geographic coordinates

Geographic coordinates: -163.6494, 64.87322 (WGS84)
Relative position This is a 1.2 mile-long segment of the Niukluk River floodplain starting 0.8 miles below Council. It is locality 122 of Cobb (1972, MF 445; 1978, OF 78-181).
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Geographic areas

Country State
United States Alaska


Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Garnet Gangue
Magnetite 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

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel

Nearby scientific data

(1) -163.6494, 64.87322

Comments on the geologic information

  • Geologic Description = Gold was originally discovered on the bars of the Niukluk River in 1865 when a survey crew for a telegraph line passed through the area (Collier and others, 1908). This area was dredged over a length of 1.1 miles and over widths up to 500 feet. Heavy mineral concentrates from the river contain garnet, pyrite, and magnetite (Collier and others, 1908). The surface elevation is about 75 feet and the depth to bedrock is not known. Gold was present throughout the gravel but concentrated on bedrock. Some gravels were reported to be thick and bedrock to be at elevations below sea level in what were interpreted to be old river channels (Smith, 1908). This part of the Niukluk River is located proximally to the coastal lowlands of Golovin Bay and at low enough elevations to have been influenced by Quaternary sea level fluctuations.
  • Age = Quaternary; the elevation and location of these placers suggest that they are the result of more than one cycle of erosion and deposition and that sea level fluctuations influenced their development.

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Probably inactive

Mining district

District name Council

Comments on the workings information

  • Workings / Exploration = An area of the active floodplain, 1.1 miles long and up to 500 feet wide, has been dredged.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012627
USGS Alaska Resource Data File ARDF SO049

Bibliographic references

  • Deposit

    Collier, A. J., Hess, F.L., Smith, P.S., and Brooks, A.H., 1908, The gold placers of parts of Seward Peninsula, Alaska, including the Nome, Council, Kougarok, Port Clarence, and Goodhope precincts: U.S. Geological Survey Bulletin 328, 343 p.

  • Deposit

    Smith, P.S., 1908, Investigations of mineral deposits of Seward Peninsula: U.S. Geological Survey Bulletin 345, p. 206-250.

  • Deposit

    Cobb, E.H., 1972, Metallic resources map of the Solomon quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-445, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Solomon quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-181, 185 p.

Comments on the references

  • Primary Reference = Collier and others, 1908

General comments

Subject category Comment text
Deposit Model Name = Placer Au-PGE (Cox and Singer, 1986; model 39a).

Reporter information

Type Date Name Affiliation Comment
Reporter 19-AUG-1999 Travis L. Hudson Applied Geology