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Unnamed (near mouth of Port Camden)

Prospect in Alaska, United States with commodities Thorium, Uranium
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Geologic information

Identification information

Deposit ID 10000280
MRDS ID A010324
Record type Site
Current site name Unnamed (near mouth of Port Camden)

Geographic coordinates

Geographic coordinates: -133.9508, 56.80584 (WGS84)
Relative position Northeastern Kuiu Island. Consists of outcrops of Tertiary sandstone along the shoreline at the end of the peninsula that juts out between the mouth of Kadake Bay and the north end of Port Camden. Commonly referred to as the Port Camden occurrences. Coordinates are approximately the center of the radioactive occurrences. Localities 7 and 8 of Grybeck, Berg, and Karl (1984).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Thorium Primary
Uranium Primary

Comments on the commodity information

  • Ore Material = Unidentified radioactive minerals
  • Ore Material = Unidentified radioactive minerals

Alteration

  • (Local) Unknown.

Mineral occurrence model information

Model code 204
USGS model code 30c
BC deposit profile D05
Deposit model name Sandstone U

Host and associated rocks

  • Host or associated Host
    Stratigraphic age (youngest) Tertiary

Nearby scientific data

(1) -133.9508, 56.80584
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Comments on the geologic information

  • Geologic Description = The Tertiary Kootznahoo Formation consists of light brown, poorly sorted, non-marine, dolomitic sandstone that contains clay clasts, carbonized wood fragments, and dolomitic concretions. The sandstone ranges from silty, fine-grained and thin-bedded to medium- and coarse-grained; it is partly conglomeratic, and medium- to thick-bedded. Siderite, magnetite, pyrite, and apatite are present in some lithologies. All carbonized wood fragments show radioactivity when tested in place. Readings range from 2 to 50 times background. One sample yields eU of 1300, plus-or-minus 400 ppm uranium, and gamma eU of 2300, plus-or-minus 700 ppm uranium. Samples from a four-inch-thick bed of fine-grained Tertiary sandstone contained 11 and 12 ppm uranium and up to 30 percent magnetite. (Description summarized from Eakins, 1975; Dickinson, 1979; Dickinson and Campbell, 1982; and Dickinson and Pierson, 1988.)
  • Age = Tertiary or younger based on age of the host rock, the Tertiary Kootznahoo Formation.
  • Age = Host rock is Tertiary.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Probably inactive

Mining district

District name Kupreanof

Comments on the production information

  • Production Notes = None

Comments on the reserve resource information

  • Reserves = None

Comments on the workings information

  • Workings / Exploration = Block of 30 claims staked in 1976 and active until at least 1981 (U.S. Bureau of Mines, 1980). Little indication of any work since.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010324
USGS Alaska Resource Data File ARDF PE001

Bibliographic references

  • Deposit

    Eakins, G.R., 1975, Uranium investigations in southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Geologic Report 44, 62 p.

  • Deposit

    Dickinson, K.A., 1979, A uranium occurrence in the Tertiary Kootznahoo Formation on Kuiu Island, southeast Alaska: U.S. Geological Survey Open-File Report 79-1427, 5 p.

  • Deposit

    U.S. Bureau of Mines, 1980, Claim map, Petersburg quadrangle, Alaska: U.S. Bureau of Mines Map 117, 1 sheet, scale 1:250,000.

  • Deposit

    Dickinson, K.A., and Campbell, J.A., 1982, The potential for uranium deposits in the Tertiary Kootznahoo Formation of the southern part of the Admiralty trough, southeastern Alaska: U.S. Geological Survey Open-File Report 82-983, 18 p.

  • Deposit

    Grybeck, D.J., Berg, H.C., and Karl, S.M., 1984, Map and description of the mineral deposits in the Petersburg and eastern Port Alexander quadrangles: U.S. Geological Survey Open-File Report 84-837, 86 p., 1 sheet, scale 1:250,000.

  • Deposit

    Dickinson, K.A., and Pierson, C.T., 1988, A statistical analysis of chemical and mineralogic data from the Tertiary Kootznahoo Formation in southeastern Alaska, with emphasis on uranium and thorium: U.S. Geological Survey Bulletin 1851, 19 p.

Comments on the references

  • Primary Reference = Dickinson, 1979 (USGS OF 79-1427); Dickinson and Campbell, 1982

General comments

Subject category Comment text
Deposit Model Name = Sandstone uranium (Cox and Singer, 1986; model 30c)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1998 H.C. Berg U.S. Geological Survey
Reporter 01-NOV-1998 D.J. Grybeck U.S. Geological Survey