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  3. Mineral Resource Data System (MRDS)

Unnamed (south of Zachary Bay)

Occurrence in Alaska, United States with commodities Silver, Lead, Zinc, 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. 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 10308127
Record type Site
Current site name Unnamed (south of Zachary Bay)

Geographic coordinates

Geographic coordinates: -160.66442, 55.27223 (WGS84)
Relative position This occurrence is located approximately 3.5 miles southeast of the head of Zachary Bay on Unga Island (Wilson and others, 1988, locality 26). The map site is at an elevation of 900 feet, in the SW1/4 of sec. 11, T. 57 S., R. 75 W., of the Seward Meridian. The location is accurate to within 1,200 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-2(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
Lead Primary
Zinc Critical Primary
Copper Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Sphalerite Ore

Alteration

  • (Local) The mineralization is accompanied by strong silicification.

Nearby scientific data

(1) -160.66442, 55.27223
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = At this site, Resource Associates of Alaska in 1981 located a 50-foot-wide zone of brecciated, silicified, pyritic andesite that may be a breccia pipe (Trujillo and others, 1981). The breccia fragments are in-filled by chalcopyrite, sphalerite, and galena over a 35-foot width of the zone. One sample of mineralized rock assayed 1.09 ounces of silver per ton, 2.07 percent zinc, and 0.58 percent lead. The country rocks are mapped as 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

Comments on exploration

  • Status = Inactive

Mining district

District name Alaska Peninsula

Comments on the workings information

  • Workings / Exploration = One mineralized rock sample collected by Resource Associates of Alaska assayed 1.09 ounces of silver per ton, 2.07 percent zinc, and 0.58 percent lead.

Reference information

Bibliographic references

  • Deposit

    Trujillo, R.S., Anderson, G., MacLeod, T., Hendrick, K., Farnham, S., Peterson, J., 1981. Exploration and evaluation of the Unga-Popof-Korovan Islands portion of lands leased from Aleut Native Corporation: Resource Associates of Alaska report, 70 p., 38 map sheets, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

  • Deposit

    Peterson, R.J., Handverger, P., Rosenkrans, D., Bartels, E, and Woolston, D., 1983, Shumagin Islands precious metal exploration program southwest Alaska: UNC Teton Exploration Drilling Company report, 61 p. (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 = Trujillo and others 1981

General comments

Subject category Comment text
Deposit Other Comments = This occurrence is located on land patented by, or interim-conveyed to, the Aleut Corporation.

Reporter information

Type Date Name Affiliation Comment
Reporter 09-JAN-01 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.