Little Susitna River

Occurrence in Alaska, United States with commodities Copper, Tungsten

Geologic information

Identification information

Deposit ID 10009646
MRDS ID D002735
Record type Site
Current site name Little Susitna River
Related records 10185616

Geographic coordinates

Geographic coordinates: -149.14268, 61.78956 (WGS84)
Relative position Multiple occurrences along upper reaches of Little Susitna River, centered near VABM Creek. Accurate within 1.5 miles upstream and downstream from plotted point. Locality 77-84 of Cobb (1972).
(click for info)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Tungsten Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Magnetite Ore
Pyrite Ore
Scheelite Ore

Nearby scientific data

(1) -149.14268, 61.78956

Comments on the geologic information

  • Geologic Description = Concentrate samples in stream gravels contain a few grains of scheelite and chalcopyrite (Jasper, 1967). Assays yielded up to 110 ppm Cu and 5 ppm Mo (Jasper, 1967). Nearby crystalline rocks include Tertiary to Cretaceous biotite-hornblende tonalite, and Jurassic amphibolite and foliated quartz diorite. Creek float dominantly quartz diorite.
  • Age = Jurassic or younger, based on ages of bedrock in the area.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Willow Creek

Comments on the workings information

  • Workings / Exploration = Assays yielded up to 110 ppm Cu and 5 ppm Mo (Jasper, 1967). Other pan concentrates include magnetite, pyrite, and zircon.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS D002735
USGS Alaska Resource Data File ARDF AN062

Bibliographic references

  • Deposit

    Jasper, M.W., 1967, Geochemical investigations along the Valdez to Chitina Highway, south-central Alaska: Alaska Division of Geological and Geophysical Surveys Geochemical Report 15, 33 p.

  • Deposit

    Cobb, E.H., 1975, Tungsten occurrences in Alaska: U.S. Geological Survey Mineral Investigations Resource Map MR-66, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials in the Anchorage quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1095, 184 p.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Anchorage quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-409, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Jasper, 1967

Reporter information

Type Date Name Affiliation Comment
Reporter 30-JUL-1998 D.P. Bickerstaff U.S. Geological Survey
Reporter 30-JUL-1998 S.W. Huss U.S. Geological Survey