The Boulder 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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Boulder Bay MRDS details
Site Name
Primary: Boulder 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
Model Name: Epithermal vein, generic
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Propylitic alteration as evidenced by the presense of chlorite and epidote.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrite
Gangue: Chlorite
Gangue: Epidote
Comments
Comment (Reference): Primary Reference = Christie, 1974
Comment (Workings): Workings / Exploration = Brief reconnaissance mapping and 4 soil or silt samples. Copper, molybdenum, zinc and silver were low, however a few samples showed gold to 0.20 ppm.
Comment (Deposit): Model Name = Epithermal gold vein
Comment (Geology): Geologic Description = A small 1,500 ft (450 m) long north-south trending color anomaly is developed in hornfelsed sedimentary, and pyroclastic volcanic rocks of the Unalaska Formation (see Drewes and others, 1961) cut by north-south trending monzonite and feldspar porphyry dikes. Disseminated and fracture-controlled pyrite occurs in both dike and wall rocks. Minor quartz veining is noted in the description of the occurrence as is weak fracturing.
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Miocene or younger
References
Reference (Deposit): Drewes, Harold, Fraser, G.D., Snyder, G.L., and Barnett, H.F., Jr., 1961, Geology of Unalaska Island and adjacent insular shelf, Aleutian Islands, Alaska: U.S. Geological Survey Bulletin 1028-S, p. 583-676.
Reference (Deposit): Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps.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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