Boulder Bay

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

Name: Boulder Bay

State:  Alaska

County:  na

Elevation:

Commodity: Gold

Lat, Long: 53.33, -167.73000

Map: View on Google Maps

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Reference (Deposit): Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps.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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