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Julian Creek

Past Producer in Alaska, United States with commodities Gold, Mercury, REE
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Geologic information

Identification information

Deposit ID 10002640
MRDS ID A015080
Record type Site
Current site name Julian Creek
Related records 10258409

Geographic coordinates

Geographic coordinates: -157.3729, 62.2094 (WGS84)
Relative position USGS MF-363, Loc. 36: Deposit 1 mile NW of George River
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Mercury Secondary
REE Secondary

Materials information

Materials Type of material
Cinnabar Ore
Gold Ore
Monazite Ore

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 Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Kuskokwim Group
    Rock description Kuskokwim Group
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -157.3729, 62.2094
ListMap

Comments on the geologic information

  • Geologic Description = Placer gold is in creek gravel. It was probably derived from granite porphyry at head of creek . Concentrates contain gold, cinnabar, and monazite (Cady and others, 1955; Miller and others, 1995)
  • Age = Tertiary/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 Aniak

Comments on the production information

  • Production Notes = Production estimated at 23,400 oz. Au (Bundtzen and others, 1985)

Comments on the workings information

  • Workings / Exploration = Surface: hydraulic

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A015080
USGS Alaska Resource Data File ARDF ID177

Bibliographic references

  • Deposit

    White, M.G., and Killeen, P.L., 1953, Reconnaissance for radioactive deposits in the lower Yukon-Kuskokwim highlands region, Alaska, 1947: U.S. Geological Survey Circular 255, 18 p.

  • 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

    Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction material) in the Iditarod and Ophir quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-576, 101 p.

  • Deposit

    Bundtzen, T.K., Miller, M.L., Laird, G.M., and Kline, J.T., 1985, Geology of heavy mineral placer deposits of the Iditarod and Innoko precincts, western Alaska, in Madonna, J.A., ed., Alaskan placer mining: Alaskan Placer Mining Conference, 7th, Fairbanks, Alaska, 1985, Proceedings, p. 35-41.

  • Deposit

    Miller, M.L., Bundtzen, T.K., Keith, W.J., Bailey, E.A., Bickerstaff, Damon, 1996, Geology and mineral resources of the Stuyahok area, part of Holy Cross A-4 and A-5 quadrangles, Alaska: U.S. Geological Survey Open-File Report 96-505-A, 30 p.

Comments on the references

  • Primary Reference = Bundtzen and others, 1985

General comments

Subject category Comment text
Deposit Model Name = Placer:stream
Deposit Other Comments = Stream gradient about 100 ft. per mile.

Reporter information

Type Date Name Affiliation Comment
Reporter 25-MAY-1994 Powers, M.T. U.S. Geological Survey
Reporter 25-MAY-1994 Huber, D.F. U.S. Geological Survey
Reporter 25-MAY-1994 Miller, M.L. U.S. Geological Survey