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

Unnamed (near the head of Portage Bay)

Occurrence in Alaska, United States with commodities Copper, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Mineral occurrence model 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 10307312
Record type Site
Current site name Unnamed (near the head of Portage Bay)

Geographic coordinates

Geographic coordinates: -158.61245, 56.20928 (WGS84)
Relative position This site is located near the head of Portage Bay (MacKevett and Holloway, 1977, locality 5). Site location is accurate to within 2 miles.

Site location context

Political divisions (FIPS codes)

Lake and Peninsula(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chignik A-2(quadrangle 1:63,360 scale)

Chignik SE(quadrangle 1:100,000 scale)

Chignik(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Shelikof Strait(hydrologic unit)

Kodiak-Shelikof(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Chignik Lagoon Native 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
Copper Primary
Silver Secondary

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4

Nearby scientific data

(1) -158.61245, 56.20928
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The area is underlain by volcanic rocks of the Meshik Formation of Oligocene and Eocene ages (Detterman and others, 1981). MacKevett and Holloway (1977) indicate alteration and porphyry type mineralization possibly associated with Tertiary intrusives.
  • 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 = U.S. Bureau of Mines records indicate claims were staked on this occurrence in the mid-1960's.

Reference information

Bibliographic references

  • Deposit

    U.S. Bureau of Mines, 1973, Alaska 1:250,000-scale quadrangle map overlays showing mineral deposit locations, principal minerals, and number and type of claims: U.S. Bureau of Mines Open-File Report 20-73, 95 overlays (updated in 1986, 1987).

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

Comments on the references

  • Primary Reference = MacKevett and Holloway, 1977

General comments

Subject category Comment text
Deposit Model Name = Porphyry copper? (Cox and Singer, 1986; model 17)
Deposit Other Comments = This site is located on land conveyed to or patented by the Bristol Bay Native Corporation.

Reporter information

Type Date Name Affiliation Comment
Reporter 08-FEB-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.