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  3. Mineral Resource Data System (MRDS)

Unnamed (east tip of Sutwik Island)

Occurrence in Alaska, United States with commodity Copper
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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. Mineral occurrence model information
  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 10308352
Record type Site
Current site name Unnamed (east tip of Sutwik Island)

Geographic coordinates

Geographic coordinates: -156.90244, 56.49932 (WGS84)
Relative position This site is located on the eastern tip of Sutwik Island near Foggy Cape (MacKevett and Holloway, 1977, locality 6). Site location is accurate to within 2 miles.

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Semidi Islands N(quadrangle 1:100,000 scale)

Sutwik Island(quadrangle 1:250,000 scale)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) The alteration is unknown but it probably includes propylitic and sericitic types.

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4

Nearby scientific data

(1) -156.90244, 56.49932
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The rocks at this site consist of basaltic plug domes intruding sedimentary strata of the Meshik Formation (Detterman and others, 1981). The site has been described as a porphyry-type occurrence consisting of a strongly altered zone in Tertiary hypabyssal and volcanic rocks (MacKevett and Holloway, 1977). No mention is made of ore or gangue minerals present.
  • Age = Tertiary.

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Alaska Peninsula

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = MacKevett and Holloway, 1977

General comments

Subject category Comment text
Deposit Model Name = Porphyry copper (Cox and Singer, 1986, model 17)
Deposit Other Comments = This site is on land selected by the Koniag Native Corporation.

Reporter information

Type Date Name Affiliation Comment
Reporter 31-JAN-00 S.H. Pilcher 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.