Makushin River Placer

Occurrence in Alaska, United States with commodity Gold

Geologic information

Identification information

Deposit ID 10002321
MRDS ID A013234
Record type Site
Current site name Makushin River Placer
Related records 10258244

Geographic coordinates

Geographic coordinates: -166.78157, 53.89577 (WGS84)
Relative position Locality is about 9 km east of Broad Bay landing strip on the Makushin River and corresponds to locality 4 of Cobb (1972, MF-446). Acccurate within about 300 m.
(click for info)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold 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 Host
    Rock type Unconsolidated Deposit > Alluvium
    Stratigraphic age (youngest) Holocene
  • Host or associated Host
    Rock type Unconsolidated Deposit > Till

Nearby scientific data

(1) -166.78157, 53.89577

Comments on the geologic information

  • Geologic Description = A few minute grains of gold panned from 2 tributaries on north side of Makushin River. Above these streams is a conspicuous gossan of altered and pyritized rocks of the Unalaska Formation (see Drewes and others, 1961).
  • Age = Quaternary

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Aleutian Islands

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A013234
USGS Alaska Resource Data File ARDF UN002

Bibliographic references

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Unalaska quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies MF-446, 1 sheet, scale 1: 250,000.

  • Deposit

    Cobb, E.H., 1980, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in fifteen quadrangles in southwestern and west-central Alaska: U.S. Geological Survey Open-File Report 80-909, 103 p.

  • Deposit

    Drewes, Harold, Fraser, G.D., Snyder, G.L., and Barnett, H.F., Jr., 1961, Geology of Unalaska Island and adjacent insular shelf, Aleutian Islands, Alaska: U.S. Geological Survey Bulletin 1028-S, p. 583-676.

Comments on the references

  • Primary Reference = Drewes and others, 1961

General comments

Subject category Comment text
Deposit Model Name = Placer gold-PGE
Deposit Other Comments = Stream gradient about 75 m/km.

Reporter information

Type Date Name Affiliation Comment
Reporter 18-MAR-1996 L.P. Niles U.S. Geological Survey
Reporter 18-MAR-1996 D.F. Huber U.S. Geological Survey
Reporter 18-MAR-1996 F.H. Wilson U.S. Geological Survey