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  3. Mineral Resource Data System (MRDS)

Swan

Occurrence in Alaska, United States with commodities Gold, Arsenic
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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. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10308686
Record type Site
Current site name Swan

Geographic coordinates

Geographic coordinates: -160.74642, 55.25723 (WGS84)
Relative position This occurrence is located on Unga Island approximately 4 miles southwest of the head of Zachary Bay. The map site is at an elevation of about 200 feet, on a creek in the SE1/4 of sec. 12, T. 57 S., R. 76 W., Seward Meridian. The location is accurate to within 2,500 feet.

Site location context

Political divisions (FIPS codes)

Aleutians East(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Port Moller B-3(quadrangle 1:63,360 scale)

Unga Island(quadrangle 1:100,000 scale)

Port Moller(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Cold Bay(hydrologic unit)

Aleutian Islands(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Unga Corporation(ANCSA Village)

ANCSA Village NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Arsenic Critical Secondary

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Quartz Gangue

Alteration

  • The host rocks are weakly to moderately argillized; there are some patches of propylitization.

Nearby scientific data

(1) -160.74642, 55.25723
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This occurrence consists of a 1100- by 600-foot area containing scattered quartz veins in argillically and locally propylitically altered tuff (Ellis, 1988). The volcanic rock is Tertiary in age (Wilson and others, 1995). Chalcedonic quartz occurs in veins 0.5 to 6 inches wide containing up to 5 percent disseminated pyrite and scattered pyrite boxworks. Rock samples were anomalous in arsenic, but only a trace gold was detected. Pan samples contained as much as 0.36 ppm gold (Ellis, 1988).
  • Age = Tertiary.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Alaska Peninsula

Comments on the workings information

  • Workings / Exploration = Battle Mountain Exploration Company examined the area in 1988 and collected 21 rock samples for analysis. The samples were anomalous in arsenic, but contained only a trace of gold. Pan samples contained as much as 0.36 ppm gold (Ellis, 1988).

Reference information

Bibliographic references

  • Deposit

    Ellis, W.T., 1988, Unga/Alaska Peninsula project, 1988 report: Battle Mountain Exploration Company report, 64 p. (Report held by the Aleut Corporation, Anchorage, Alaska.)

  • Deposit

    Wilson, F.H., Detterman, R.L., Miller, J. W., and Case, J.E., 1995, Geologic map of the Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-2272, 1 map sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Ellis, 1988; Wilson and others, 1995

General comments

Subject category Comment text
Deposit Model Name = Epithermal gold veins
Deposit Other Comments = This prospect is located on land patented by, or interim-conveyed to, the Aleut Corporation.

Reporter information

Type Date Name Affiliation Comment
Reporter 04-FEB-2001 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.