Beaver Inlet, Amugul Bay, Tanaskan Bay

The Beaver Inlet, Amugul Bay, Tanaskan Bay is a silver, gold, and 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: Beaver Inlet, Amugul Bay, Tanaskan Bay

Commodity

Primary: Silver
Primary: Gold
Primary: Copper
Secondary: Zinc

Location

State: Alaska
District: Aleutians

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

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Alteration is propylitic on the basis of disseminated and fracture controlled epidote. Fractured zones are totally leached.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Gangue: Epidote
Gangue: Pyrite

Comments

Comment (Workings): Workings / Exploration = Five soil samples were collected by Quintana's field party (Christie, 1974) in the course of brief reconnaissance mapping. Samples yielded up to 270 ppm copper, 198 ppm zinc, 1.6 ppm silver, and 0.04 ppm gold.

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Christie, 1974

Comment (Deposit): Model Name = Copper porphyry

Comment (Geology): Geologic Description = deep red-brown to yellow-brown color anomaly 8,000 ft (2,400 m) by 3,000 Ft (900 m) in size which is elongate in an east-west direction. The color anomaly occurs in a diorite to gabbro stock intruding amygdaloidal porphyritic andesite flows. Leucocratic feldspar porphyry monzonite(?) dikes are syn-mineralization, however Christie (1974) did not report which unit(s) these dikes intrude. The stock contains disseminated pyrite and trace chalcopyrite. The intruded volcanic rocks are propylitically altered and carry up to 3 to 5 percent fracture localized and disseminated pyrite. In some areas, high density fracturing is present. Locally abundant ferricrete caps the occurrence.

Comment (Geology): Age = Cenozoic

References

Reference (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.)

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