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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Beaver Inlet, Amugul Bay, Tanaskan Bay MRDS details
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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