Upper Ruby Creek

Past Producer in Alaska, United States with commodities Silver, Gold, Bismuth, Thorium, Tungsten

Geologic information

Identification information

Deposit ID 10009621
MRDS ID D002708
Record type Site
Current site name Upper Ruby Creek

Geographic coordinates

Geographic coordinates: -154.78101, 63.23254 (WGS84)
Relative position The Upper Ruby Creek mine is located at an elevation of 1,000 feet (300 m) in Section 13, T. 26 S., R. 22 E., of the Kateel River Meridian. Location is within 300 feet (91 m).
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Geographic areas

Country State
United States Alaska


Commodity Importance
Silver Primary
Gold Primary
Bismuth Secondary
Thorium Secondary
Tungsten Secondary

Comments on the commodity information

  • Ore Material = radioactive mineral (brookite)

Materials information

Materials Type of material
Bismuth Ore
Gold Ore
Scheelite Ore
Ilmenite Gangue
Magnetite Gangue

Mineral occurrence model information

Model code 121
USGS model code 39c
BC deposit profile C01. C02
Deposit model name Shoreline placer Ti

Nearby scientific data

(1) -154.78101, 63.23254

Comments on the geologic information

  • Geologic Description = The Upper Ruby Creek placer mine is a continuation of the Ruby Creek-Strand deposit (MD069); the only difference is a higher stream gradient of 250 feet/mile. White and Stevens (1953) studied the abundant radioactive concentrates from Upper Ruby Creek placer deposit. Age of mineralization is unknown, but probably Quaternary, based on local geomorphology.

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 McGrath

Comments on the production information

  • Production Notes = Production data is scant and was lumped with Ruby Creek-Strand and Crystal Gulch deposits, which collectively produced 1,511 ounces (47 kg) of gold from 1920 to 1942.

Comments on the workings information

  • Workings / Exploration = Upper Ruby Creek was mined mostly prior to 1925 (Brown, 1926).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS D002708
USGS Alaska Resource Data File ARDF MD068

Bibliographic references

  • Deposit

    Brown, J.S., 1926, The Nixon Fork country: U.S. Geological Survey Bulletin 783. p. 97-144.

  • Deposit

    Smith, P.S., 1926, Mineral industry of Alaska in 1924: U.S. Geological Survey Bulletin 783-A, p. 1-39.

  • Deposit

    Mertie, J.B., Jr., 1936, Mineral deposits of the Ruby-Kuskokwim region, Alaska: U.S. Geological Survey Bulletin 864-C, 115-245.

  • Deposit

    White, M.G., and Stevens, J.M., 1953, Reconnaissance for radioactive minerals in the Ruby-Poorman and Nixon Fork districts, west-central Alaska, in 1949: U.S. Geological Survey Circular 279, 19 pages.

  • Deposit

    Cobb, E.H., 1974, Synopsis of mineral resources and geology of Alaska: U.S. Geological Survey Bulletin 1307, 53 pages.

  • Deposit

    Cobb, E.H., 1978, Summary of references to mineral occurrences in the Beaver, Bettles, and Medfra quadrangles: U.S. Geological Survey Open File Report 78-94, 54 pages.

Comments on the references

  • Primary Reference = Mertie, 1936

General comments

Subject category Comment text
Deposit Model Name = Placer Au-PGE (Cox and Singer, 1986; model no. 39c)
Deposit Other Comments = See Ruby Creek-Strand (MD068) and Crystal Gulch (MD070) deposits. The Upper Ruby Creek mine is on lands selected or conveyed to Doyon Ltd. For further information, contact Doyon Ltd. at 210 1st Ave., Fairbanks, Alaska, 99701.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-JUN-98 Bundtzen, T.K. Pacific Rim Geological Consulting