The Banner is a copper, gold, and silver 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
Banner MRDS details
Site Name
Primary: Banner
Commodity
Primary: Copper
Primary: Gold
Primary: Silver
Location
State: Alaska
District: Valdez Creek
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: Polymetallic veins
Model Name: Skarn Cu
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Pyrite-quartz-sericite veins overprint earlier skarn calc-silicate assemblages that consist of epidote, pyroxene, actinolite, and occasional garnet.
Rocks
Role: Host
Age Type: Host Rock
Age Young: Tertiary
Role: Associated
Age Type: Associated Rock
Age in Years: 67.500000+-2.500000
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Arsenopyrite
Ore: Chalcopyrite
Ore: Pyrite
Ore: Pyrrhotite
Gangue: Quartz
Gangue: Sericite
Comments
Comment (Geology): Age = The skarns are probably related to an apophysis of the Upper Cretaceous (70-65 Ma) porphyry plug at the Golden Zone mine (HE043). The quartz-sericite veins may be Tertiary.
Comment (Workings): Workings / Exploration = Workings consist of surface trenches and two holes drilled to a maximum depth of 300 feet. Copper content ranges up to 1% and gold values run 0.4 to 1 ounce per ton.
Comment (Deposit): Model Number = 18b, 22c
Comment (Geology): Geologic Description = In the area of the Banner prospect, the northeast-trending Banner fault separates unaltered Triassic sedimentary rocks on the southeast from strongly altered Triassic conglomerate, hornfels, and marble on the northwest. The altered rocks are cut by skarn zones extending 500 feet from the fault zone. The deposit consists of sulfide-bearing skarn and quartz-sericite veins that cut the skarn. Sulfides in the skarn zones vary in content, but average about 10%. They consist of arsenopyrite, pyrrhotite, pyrite, chalcopyrite (unpublished report by Addwest Minerals International Ltd., 1997). Copper content ranges up to 1% and gold values run 0.4 to 1 ounce per ton. The Banner skarn deposit probably is related to an apophysis of the Upper Cretaceous (70-65 Ma) porphyry plug at the Golden Zone mine (HE043).
Comment (Reference): Primary Reference = Hawley and Clark, 1974
Comment (Deposit): Model Name = Cu skarn and polymetallic veins (Cox and Singer, 1986; models 18b, 22c)
Comment (Exploration): Status = Active
Comment (Geology): Age = Chron age is for the Golden Zone mine.
References
Reference (Deposit): Hawley, C.C., and Clark, A.L., 1974, Geology and mineral deposits of the upper Chulitna district, Alaska: U.S. Geological Survey Professional Paper 758-B, p. 1-47, 2 sheets, scale 1:12,000 and 1:48,000.
Reference (Deposit): Hawley, C.C., and others, 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska. Contract No. JO166107: U.S. Bureau of Mines Open-File Report 24-78, 274 p., 12 sheets.
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