Unnamed (in Selawik Hills)

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10002564
MRDS ID A013507
Record type Site
Current site name Unnamed (in Selawik Hills)

Geographic coordinates

Geographic coordinates: -159.62339, 66.15945 (WGS84)
Relative position This occurrence is at an elevation of about 550 feet at the east edge of section 24, T. 9 N., R. 5 W., of the Kateel River Meridian. Barker (1985), fig. 7, location L.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Malachite Ore
Pyrite Ore
Calcite Gangue
Chlorite Gangue
Epidote Gangue

Alteration

  • (Local) Chlorite and epidote.

Mineral occurrence model information

Model code 87
USGS model code 23
BC deposit profile D03
Deposit model name Basaltic Cu (BC name is Volcanic redbed Cu)
Mark3 model number 118

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -159.62339, 66.15945

Comments on the geologic information

  • Geologic Description = The country rocks at this occurrence consist of Jurassic metabasalt and metasedimentary rocks. The occurrence consists of pyrite, malachite, and minor chalcopyrite in calcite, chlorite and epidote veins in chlorite-altered basalt (greenstone) and in fine-grained banded metasedimentary rocks. Metallic minerals in the veins occur as veinlets and pods. Sulfide banding in the greenstone consists predominately of pyrite. Copper values in high-grade grab samples did not exceed 1,000 ppm. Copper values greater than 100 ppm were noted in a stream-sediment sample taken from a stream which drains the site (Barker, 1985).
  • Age = Jurassic

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Selawik

Comments on the workings information

  • Workings / Exploration = Site was sampled by the U.S. Bureau of Mines (Barker, 1985).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A013507
USGS Alaska Resource Data File ARDF SE003

Bibliographic references

  • 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 = Basaltic Cu? (Cox and Singer, 1986; model 23)
Deposit Other Comments = This occurrence is on the boundary of the Selawik National Wildlife Refuge.

Reporter information

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