The Unnamed (tributary to Trail Creek) 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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Unnamed (tributary to Trail Creek) MRDS details
Site Name
Primary: Unnamed (tributary to Trail Creek)
Commodity
Primary: Gold
Secondary: Arsenic
Secondary: Silver
Secondary: Bismuth
Secondary: Boron-Borates
Secondary: Zinc
Secondary: Antimony
Location
State: Alaska
District: Bristol Bay Region
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: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Silicification, clay alteration, and oxidation.
Rocks
Name: Volcanic Rock (Aphanitic)
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Arsenopyrite
Ore: Pyrite
Gangue: Clay
Gangue: Quartz
Gangue: Tourmaline
Comments
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Late Cretaceous. The mineralization is assumed to be related to the Upper Cretaceous granitic stock, which yielded a K/Ar age of 71.1 +/- 2.1 Ma on biotite (Hoare and Coonrad, 1978).
Comment (Deposit): Model Name = Polymetallic veins (Cox and Singer, 1986; model 22c)
Comment (Geology): Geologic Description = This occurrence is in hornfels near the contact of an Upper Cretaceous granitic stock (Hoare and Coonrad, 1978). Reconnaissance stream-sediment and pan concentrate samples from the area contain anomalous levels of several elements (Kilburn and Jones, 1992; Jones and Kilburn, 1992). Silicified hornfels contains disseminated pyrite and pyrite-, arsenopyrite-, and tourmaline-bearing quartz veins. Clay alteration and weakly disseminated pyrite characterize some iron-stained outcrops. Rock samples of altered and mineralized hornfels contain up to 0.28 ppm Ag, greater than 3,800 ppm As, 0.15 ppm Au, greater than 2,000 ppm B, 11 ppm Bi, greater than 5,000 ppm Mn, 5.4 ppm Sb, and 230 ppm Zn (Kilburn and others, 1992).
Comment (Reference): Primary Reference = Kilburn and others, 1992
Comment (Workings): Workings / Exploration = Only reconnaissance surface observations and sampling have been completed in the area.
References
Reference (Deposit): Hoare, J.M., and Coonrad, W.L., 1978, Geologic map of the Goodnews and Hagemeister Island quadrangles region, southwestern Alaska: U.S. Geological Survey Open-File Report 78-9-B, two sheets, scale 1:250,000.
Reference (Deposit): Kilburn, J.E., and Jones, J.L., 1992, Geochemical map showing the distribution of selected elements determined in stream-sediment samples from the Goodnews Bay, Hagemeister Island, and Nushagak Bay quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2355, scale 1:250,000.
Reference (Deposit): Jones, J.L., and Kilburn, J.E., 1992, Geochemical map showing the distribution of selected elements determined in heavy-mineral-concentrate samples from the Goodnews Bay, Hagemeister Island, and Nushagak Bay quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2186, scale 1:250,000.
Reference (Deposit): Kilburn, J., Box, S.E., Goldfarb, R.J., and Gray, J.E., 1992, Geochemically anomalous areas in the eastern Goodnews Bay quadrangle, southwest Alaska, in Bradley, D. C., and Ford, A. B., eds., The U.S. Geological Survey in Alaska, Accomplishments in 1990: U. S. Geological Survey Bulletin 1999, p. 156-162.
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