The Shannon is a silver 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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Shannon MRDS details
Site Name
Primary: Shannon
Commodity
Primary: Silver
Primary: Copper
Secondary: Zinc
Secondary: Cobalt
Secondary: Gold
Location
State: Alaska
District: Juneau (Skagway subdistrict)
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
Model Name: Skarn Cu
Orebody
Not available
Structure
Not available
Alterations
Alteration Text: Skarn.
Rocks
Not available
Analytical Data
Not available
Materials
Not available
Comments
Comment (Exploration): Status = Probably inactive
Comment (Geology): Age = Probably Cretaceous based on the age of the nearby intrusive rocks (MacKevett and others, 1974).
Comment (Geology): Geologic Description = According to Still and others (1991), the Shannon prospect is a small iron-stained lens of grossularite garnet-sulfide-magnetite skarn discovered in 1987 by Merrill Palmer . Selected high-grade samples from this lens contained up to 0.068 ppm gold, 1.3 ppm silver, 600 ppm zinc, 3,400 ppm copper, and 245 ppm cobalt (Gilbert and others, 1991). The host rocks for this prospect are Paleozoic to early Mesozoic mafic volcanics and sediments near an apophysis of Cretaceous quartz diorite to granodiorite that extends to the northeast from Flower Mountain (MacKevett and others, 1974). The skarn and mineralization are probably related to this intrusive body, thus are probably Cretaceous.
Comment (Reference): Primary Reference = Still and others, 1991
Comment (Deposit): Model Name = Copper skarn (Cox and Singer, 1986; model 18b).
References
Reference (Deposit): MacKevett, E.M., Jr., Robertson, E.C., and Winkler, G.R., 1974, Geology of the Skagway B-3 and B-4 quadrangles, southern Alaska: U.S. Geological Survey Professional Paper 832, 33 p.
Reference (Deposit): Gilbert, W.G., and Redman, E.C., 1989, Lode deposits, prospects, and occurrences of the Porcupine mining area, southeast Alaska: U.S. Bureau of Mines Open-File Report 17-89, 1 sheet, scale 1:39,600.
Reference (Deposit): Gilbert, W.G., Still, J.C., Burns, L.E., Wier, K.R., and Redman, E.C., 1991, Geochemistry of Haines-Klukwan-Porcupine area, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 91-5, 1 sheet, scale 1:63,360, 75 p.
Reference (Deposit): Still, J.C., 1991, Bureau of Mines mineral investigations in the Juneau mining district, Alaska, 1984 - 1988, v. 2, Detailed mine, prospect, and mineral occurrence descriptions, section A, Haines-Klukwan-Porcupine subarea: U.S. Bureau of Mines of Mines Special Publication, 214 p.
Reference (Deposit): Still, J.C., Hoekzema, R.B., Bundtzen, T.K., Gilbert, W.G., Wier, K.R., Burns, L.E., and Fechner, S.A., 1991, Economic geology of Haines-Klukwan-Porcupine area, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 91-4, 156 p., 5 sheets, scale 1:63,360.
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