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  3. Mineral Resource Data System (MRDS)

Unnamed (east-northeast of Cape Kigunak)

Occurrence in Alaska, United States with commodities Gold, Silver, Copper, Molybdenum, Zinc
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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 10308475
Record type Site
Current site name Unnamed (east-northeast of Cape Kigunak)

Geographic coordinates

Geographic coordinates: -168.40237, 53.29907 (WGS84)
Relative position This site is located approximately 3 miles east-northeast of Cape Kigunak at an elevation of less than 200 feet. It corresponds to Christie's (1974) color anomaly 35. 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

Umnak B-2 SE(quadrangle 1:24,000 scale)

Umnak Island(quadrangle 1:100,000 scale)

Umnak(quadrangle 1:250,000 scale)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Copper Secondary
Molybdenum Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) The rocks at this site exhibit propylitic alteration increasing to pervasive sericitization and silicification adjacent to the quartz veins.

Mineral occurrence model information

Model code 106
USGS model code 25b
Deposit model name Epithermal vein, Creede
Mark3 model number 58

Nearby scientific data

(1) -168.40237, 53.29907
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This occurrence, measuring approximately 5,000 x 3,000 feet in area, consists of quartz stockwork veins in altered diorite (Christie, 1974). The stockwork is moderately to well-developed throughout and contains composite veins up to 6 feet in thickness. The quartz veins contain minor chalcopyrite and pyrite. Disseminated pyrite is common, especially adjacent to quartz veins. The diorite exhibits propylitic alteration increasing to pervasive sericitization and silicification adjacent to the quartz veins. . The Aleut-Quintana-Duval JV collected 10 rock samples in 1974. The best metal values obtained were 66 ppm copper, 0.2 ppm gold, 38 ppm molybdenum, 1.8 ppm silver, and 116 ppm zinc (Christie, 1974).
  • Age = Tertiary or later.

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Aleutian Islands

Comments on the workings information

  • Workings / Exploration = The Aleut-Quintana-Duval JV sampled this site in 1974 (Christie, 1974). Best values from 10 rock samples were 66 ppm copper, 0.2 ppm gold, 28 ppm molybdenum, 1.8 ppm silver, and 116 ppm zinc.

Reference information

Bibliographic references

  • Deposit

    Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (Report held by the Aleut Corporation, Anchorage, Alaska.)

Comments on the references

  • Primary Reference = Christie, 1974

General comments

Subject category Comment text
Deposit Model Name = Creede epithermal veins? (Cox and Singer, 1986; model 25b)
Deposit Other Comments = This site is on land selected by the Aleut Native Corporation.

Reporter information

Type Date Name Affiliation Comment
Reporter 27-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.