Foot Bay

The Foot Bay is a copper mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Foot Bay

Commodity

Primary: Copper
Secondary: Gold
Secondary: Molybdenum
Secondary: Silver

Location

State: Alaska
District: Alaska Peninsula

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Model Name: Porphyry Cu-Mo
Model Name: Porphyry Cu

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Ore: Molybdenite
Ore: Pyrite

Comments

Comment (Reference): Primary Reference = Fields, 1977

Comment (Exploration): Status = Inactive

Comment (Deposit): Other Comments = This mineral occurrence is located within the Alaska Peninsula National Wildlife Refuge.

Comment (Geology): 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.

Comment (Deposit): Model Number = 17, 21a

Comment (Deposit): Model Name = Porphyry copper; porphyry copper-molybdenum (Cox and Singer, 1986; models 17, 21a)

Comment (Workings): 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.

Comment (Geology): Age = Tertiary.

References

Reference (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.)

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