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Uranium 2 (in Selawik Hills)

Prospect in Alaska, United States with commodities Thorium, 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. Materials information
  7. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10002562
MRDS ID A013505
Record type Site
Current site name Uranium 2 (in Selawik Hills)

Geographic coordinates

Geographic coordinates: -160.63646, 66.12332 (WGS84)
Relative position This prospect is at an elevation of about 950 feet in the NE1/4 section 6, T. 8 N., R. 9 W., of the Kateel River Meridian. Barker (1985), figs. 7, 8, location D.

Site location context

Political divisions (FIPS codes)

Northwest Arctic(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Selawik A-4(quadrangle 1:63,360 scale)

Selawik S(quadrangle 1:100,000 scale)

Selawik C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Buckland River(hydrologic unit)

Northern Seward Peninsula(hydrologic accounting unit)

Northwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Thorium Primary
Uranium Primary

Comments on the commodity information

  • Ore Material = Radioactive minerals

Materials information

Materials Type of material
Fluorite Gangue

Alteration

  • (Local) Clay, chlorite, epidote, and carbonate alteration.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite

Nearby scientific data

(1) -160.63646, 66.12332
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rock in the area of this prospect is the mid-Cretaceous Selawik Hills alkaline intrusive complex. The prospect is one of several areas of anomalous radioactivity within the complex. Barker (1985) describes the following features at this site. In anomalous area 1, radioactive altered zones occur in medium-grained biotite-hornblende syenite. At location D, a north-trending ridge of hornblende syenite hosts zones of clay, chlorite, epidote and carbonate alteration. Fluorite is common as discrete grains and as fracture fillings. At sample site 25R, a rubble zone yielded radiometric levels of about 3 times background and contained 770 ppm U3O8 and 4,957 ppm Th. An unidentified red, waxy mineral accounted for 5% to 10% of the rock.
  • Age = Cretaceous.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Selawik

Comments on the workings information

  • Workings / Exploration = Shallow prospect pits and a core drill hole, probably dating from the 1950's, were found in the vicinity of the prospect (Barker, 1985). Samples and preliminary mapping was done by U.S. Bureau of Mines in early 1980's.

Reference information

Bibliographic references

  • Deposit

    Grybeck, D.J., 1977, Known mineral deposits of the Brooks Range, Alaska: US Geological Survey Open-File Report 77-166C, 41 p., 1 sheet, scale 1:1,000,000.

  • Deposit

    Barker, J.C., 1985, Sampling and analytical results of a mineral reconnaissance in the Selawik Hills area, northwestern Alaska: U.S. Bureau of Mines Open-File Report 43-85, 67 p.

Comments on the references

  • Primary Reference = Barker, 1985

General comments

Subject category Comment text
Deposit Model Name = Disseminated radioactive minerals in syenite.

Reporter information

Type Date Name Affiliation Comment
Reporter 02-DEC-99 Williams, Anita U.S. Geological Survey

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.