The Plumbum 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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Plumbum MRDS details
Site Name
Primary: Plumbum
Commodity
Primary: Gold
Location
State: Alaska
District: Fairbanks
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Gold
Comments
Comment (Reference): Primary Reference = Brooks, 1913
Comment (Workings): Workings / Exploration = A 26 foot deep shaft was dug by 1912 (Times Publishing Company, 1912). Brooks (1913) reported that the shear zone could be traced for approximately 1,500 feet along strike and 1.5 tons of material had been stockpiled for later shipment to a nearby custom mill.
Comment (Geology): Geologic Description = This prospect contains a silver and gold-bearing carbonate-rich shear zone. The country rock is schist that strikes east-west and dips to the south at a shallow angle parallel to the schist (Brooks, 1913, p. 146). Prior to 1912, a 26-foot-deep shaft was sunk on the prospect and exposed the silver- and gold-bearing, carbonate-rich shear zone. In the summer of 1912, a 4- to 18-inch-wide cross-shear had been discovered on the prospect. A high grade sample from this cross-shear averaged over 820 ounces of gold per ton (Times Publishing Company, 1912). A 15-foot-deep test pit on this cross-shear exposed an east-west striking, steeply dipping quartz-bearing shear zone that varied from 3 inches to 2 feet wide (Smith, 1913, B 525; Brooks, 1913). The shear zone material was heavily stained by iron-oxides (Brooks, 1913, p. 146). Later phase, crystalline quartz vugs also contained iron-oxides after sulfides (Brooks, 1913, p. 146). By 1913, the shear zone had been traced for approximately 1,500 feet along strike and 1.5 tons of material had been stockpiled for later shipment to a nearby custom mill (Brooks, 1913, p. 146). Hill (1933) reported that exposures on the Plumbum prospect indicated the shear zone strikes N 70 W and dips 70 S. The prospect had not been worked for some time prior to 1931.
Comment (Deposit): Model Name = Silver and gold-bearing, carbonate-rich shear zone.
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Smith, P.S., 1913, Lode mining near Fairbanks, in Prindle, L.M., A geologic reconnaissance of the Fairbanks quadrangle, Alaska: U.S. Geological Survey Bulletin 525, p. 153-216.
Reference (Deposit): Smith, P.S., 1913, Lode mining near Fairbanks: U.S. Geological Survey Bulletin 542-F, p. 137-202.
Reference (Deposit): Brooks, A.H., 1913, Mineral resources of Alaska, report on progress of investigations in 1912: U.S. Geological Survey Bulletin 542, 308 p.
Reference (Deposit): Freeman, C.J., 1992, 1991 Golden Summit project final report, volume 2: Historical summary of lode mines and prospects in the Golden Summit project area, Alaska: Avalon Development Corp., 159 p. (Report held by Freegold Recovery Inc. USA, Vancouver, British Columbia.)
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