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  3. Mineral Resource Data System (MRDS)

Unnamed (near Shirley Lake)

Prospect in Alaska, United States with commodity Uranium
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Host and associated rocks
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Links to other databases
  11. Bibliographic references
  12. Reporter information

Geologic information

Identification information

Deposit ID 10000882
MRDS ID A011536
Record type Site
Current site name Unnamed (near Shirley Lake)

Geographic coordinates

Geographic coordinates: -152.45972, 62.00256 (WGS84)
Relative position The prospect is located on the north side of Shirley Lake in the Long Lake Hills in the northeast quarter of Section 18, T. 22 N., R. 17 W., of the Seward Meridian. The location of this prospect is approximated from Reed and others (1978, locality 37). Part of deposit may lie in Tyonek quadrangle; see ARDF record TY023.

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Talkeetna A-5(quadrangle 1:63,360 scale)

Talkeetna SW(quadrangle 1:100,000 scale)

Talkeetna(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Yentna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Uranium Primary

Comments on the commodity information

  • Ore Material = Unknown secondary uranium minerals

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)

Nearby scientific data

(1) -152.45972, 62.00256
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Secondary uranium minerals are sporadically localized along joints in Tertiary tuff and tuff-breccia (Cobb, 1979, p. 22; Reed and others,1978; and Reed and Nelson,1980). Maximum amount of radioactivity in U.S. Geological Survey samples was 0.021% uranium; a prospector reported assay of 0.29% uranium in one sample (Freeman,1963, p. 29-30). Radioactive rock probably formed by deposition of small amounts of uranium that migrated with subsurface water moving along joints. Exploration did not disclose any extension of radioactive rock below surface or away from joints. The joint controlled deposits, sporadic mineralization, and general low grade of the radioactive areas indicate unfavorable conditions for the presence of ore-grade material. All deposits appear to be small and low grade (Cobb, 1979).
  • Age = Tertiary to Holocene.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Yentna

Comments on the reserve resource information

  • Reserves = All deposits appear to be small and low grade (Cobb, 1979).

Comments on the workings information

  • Workings / Exploration = Shallow pits were excavated and scintillometer surveys conducted by private concerns.

Reference information

Bibliographic references

  • Deposit

    Freeman, V.L., 1963, Examination of uranium prospects, 1956: U.S. Geological Survey Bulletin 1155, p. 29-33.

  • Deposit

    Reed, B.L., Nelson, S.W., Curtin, G.C., and Singer, D.A., 1978, Mineral resources map of the Talkeetna Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-870-D, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1979, Summary of references to mineral occurrences (other than minerals fuels and construction materials) in the Kenai and Tyonek Quadrangles, Alaska: U.S. Geological Survey Open-File Report 80-86, 36 p.

  • Deposit

    Cobb, E.H., and Reed, B.L., 1980, Summaries of data and lists of reference to metallic and selected nonmetallic mineral deposits in the Talkeetna quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-884, 106 p.

  • Deposit

    Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle: U.S. Geological Survey Miscellaneous Investigations Map I-1174, scale 1:250,000.

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.

Comments on the references

  • Primary Reference = Freeman, 1963

Reporter information

Type Date Name Affiliation Comment
Reporter 10-AUG-1998 Madelyn A. Millholland Millholland & Associates

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.