1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Unnamed (southwest of head of Zachary Bay)

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. Mineral occurrence model information
  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 10308124
Record type Site
Current site name Unnamed (southwest of head of Zachary Bay)

Geographic coordinates

Geographic coordinates: -160.70942, 55.28323 (WGS84)
Relative position This occurrence is located on Unga Island about 1.5 miles southwest of the head of Zachary Bay (Christie, 1974, color anomaly 83). The map site is at an elevation of about 1,350 feet, 0.4 mile southeast of the top of hill 2283. The locality 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

Alaska Maritime National Wildlife Refuge(National Wildlife Refuge)

National Wildlife Refuge FWS(Type of land area)

FWS(Federal land areas administered by FWS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Quartz Gangue

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4
Model code 78
USGS model code 20c
Deposit model name Porphyry Cu-Au
Mark3 model number 34

Nearby scientific data

(1) Qs
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This site represents a color anomaly 1,500 by 6,000 feet (Christie, 1974, number 83), in Tertiary diorite, dacite, and hornfels (Wilson and others, 1995). Coarse clots and disseminations of pyrite occur in the diorite and dacite. Hornfels at a diorite contact contains disseminations and fracture fillings of chalcopyrite and magnetite exposed in a 200- by 200-foot area. Samples of this rock contained up to 0.3 percent copper. Christie (1974) also reported a pyritic stockwork containing 500 ppm copper. One sample of this stockwork assayed 0.06 ppm gold.
  • Age = Tertiary.

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 = The Aleut-Quintana-Duval joint venture examined and sampled the occurrence in 1974 (Christie, 1974).

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.)

  • 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 = Christie, 1974

General comments

Subject category Comment text
Deposit Model Name = Porphyry Cu; Porphyry Cu-Au (Cox and Singer; 1986; models 17 and 20c)
Deposit Model Number = 17, 20c
Deposit Other Comments = This site is located on land patented by, or interim-conveyed to, the Aleut Corporation.

Reporter information

Type Date Name Affiliation Comment
Reporter 05-FEB-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.