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Foot Bay

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

Geologic information

Identification information

Deposit ID 10001674
MRDS ID A012453
Record type Site
Current site name Foot Bay

Geographic coordinates

Geographic coordinates: -158.77133, 56.04734 (WGS84)
Relative position This mineral occurrence is insec. 2, T. 48 S., R. 61 W., of the Seward Meridian, approximately 2 miles west of Foot Bay, near the head of a small northeast-flowing drainage. The location is accurate to within 1/2 mile.

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-3(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

Alaska Peninsula 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
Silver Secondary
Gold Secondary
Molybdenum Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Molybdenite Ore
Pyrite Ore

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4
Model code 79
USGS model code 21a
Deposit model name Porphyry Cu-Mo
Mark3 model number 2

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Tonalite
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Hoodoo Formation;Hoodoo Formation
    Rock description Hoodoo Formation;Hoodoo Formation

Nearby scientific data

(1) -158.77133, 56.04734
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This site is marked by a color anomaly which occupies an area of approximately 1/2 by 1 mile along the northern contact zone of a small diorite stock (Fields, 1977). The stock intrudes siltstone, sandstone, grit, and conglomerate of the Cretaceous Hodoo Formation, which exhibits strong hornfelsing near the contact zone.? A peripheral pyrite-bearing fracture zone is present along the northern contact. The sulfide content in this zone is up to 5 percent, whereas the intrusive contains 1 percent or less sulfides (Fields, 1977).? Two rock samples collected by Bear Creek Mining Company in 1976 contained values of about 230 ppm copper and 2 ppm molybdenum along with traces of lead, zinc, and precious metals. One high-grade sample collected near the contact had metal values of 2300 ppm copper, 1.9 ppm gold, 2 ppm molybdenum, and 4.6 ppm silver.
  • 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 = This site was briefly examined and sampled by Bear Creek Mining Company in 1976 (Fields, 1977). Two of the rock samples contained about 230 ppm copper and 2 ppm molybdenum along with minor base and precious values. A high-grade sample collected near the contact had metal values of 2300 ppm copper, 1.9 ppm gold, 2 ppm molybdenum, and 4.6 ppm silver.

Reference information

Bibliographic references

  • Deposit

    Fields, E.D., 1977, 1976 Annual report: Alaska search, Chignik area-Bristol Bay region: Bear Creek Mining Company, 44 p., 22 map sheets. (Report held by the Aleut Corporation, Anchorage, Alaska.)

Comments on the references

  • Primary Reference = Fields, 1977

General comments

Subject category Comment text
Deposit Model Name = Porphyry copper; porphyry copper-molybdenum (Cox and Singer, 1986; models 17, 21a)
Deposit Model Number = 17, 21a
Deposit Other Comments = This mineral occurrence is located within the Alaska Peninsula National Wildlife Refuge.

Reporter information

Type Date Name Affiliation Comment
Reporter 08-FEB-2000 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.