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Midway

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

Geologic information

Identification information

Deposit ID 10308687
Record type Site
Current site name Midway

Geographic coordinates

Geographic coordinates: -160.69341, 55.22423 (WGS84)
Relative position This occurrence is located on Unga Island approximately 2 miles northeast of the head of Acheredin Bay and 4,000 feet north of Acheredin Lake (Wilson and others, 1988, locality 32). The map site is at an elevation of 1,100 feet, near the south end of the boundary between secs. 20 and 21, T. 57 S., R. 75 W., of the 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 A-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
Silver Primary
Gold Primary
Mercury Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Pyrite Ore
Chalcedony Gangue
Jasper Gangue
Zeolite Gangue

Nearby scientific data

(1) -160.69341, 55.22423
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This occurrence consists of several knobs of andesite breccia in an area 100 by 1,000 feet. The breccias contain pyrite, chalcedony, jasper, and zeolite. Samples of the breccia contained as much as 0.02 ppm gold, 15 ppm silver, 720 ppm zinc, 510 ppm arsenic, and 5 ppm mercury (Peterson and others, 1982). The andesite is part of the late Eocene to early Oligocene Popof volcanic rocks (Wilson and others, 1995).
  • Age = Eocene or younger.

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 = UNC Teton Exploration Drilling Company sampled the occurrence in 1982. Samples contained as much as 0.02 ppm gold, 15 ppm silver, 720 ppm zinc, 510 ppm arsenic, and 5 ppm mercury.

Reference information

Bibliographic references

  • Deposit

    Peterson, R.J., Lemmers, J., Handverger, P., Gallagher, J., Pilcher, R., East, J., Macleod, T., Bartels. E., 1982, Geology and precious metals potential Unga, Popof, and Korovin Islands, Shumagin Group, Aleutian Chain, Alaska: UNC Teton Exploration Drilling Company report, 127 p., 5 map sheets, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

  • Deposit

    Wilson, F.H., White, W.H., and DuBois, G.D., 1988, Brief descriptions of mines, prospects, and mineral occurrences in the Port Moller and Stepovak Bay quadrangles, Alaska Peninsula: U.S. Geological Survey Open-File Report 88-666, 128 p., scale 1:250,000.

  • 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 = Peterson and others, 1982

General comments

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

Reporter information

Type Date Name Affiliation Comment
Reporter 12-JAN-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.