The Portage Bay is a gold 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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Portage Bay MRDS details
Site Name
Primary: Portage Bay
Commodity
Primary: Gold
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
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Argillic alteration and local silicification reported. Minor leaching.
Rocks
Not available
Analytical Data
Not available
Materials
Gangue: Pyrite
Comments
Comment (Reference): Primary Reference = Christie, 1974
Comment (Geology): Geologic Description = Very large, 5,000 ft (1,500 m) by more than 5,000 ft (1,500 m) intense yellow-brown to red-brown color anomaly elongated parallel to valley, roughly northeast. Pyrite is disseminated through amygdaloidal andesite flows, minor pyroclastic rocks, and porphyritic andesite. No intrusive rocks were found within the color anomaly. Christie (1974) interpreted that the alteration is solfataric in nature. Fracturing is mainly post-mineralization.
Comment (Workings): Workings / Exploration = Reconnaissance mapping only, no sampling.
Comment (Exploration): Status = Inactive
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Reference (Deposit): Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps.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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