The Pierson is a silver and 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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Pierson MRDS details
Site Name
Primary: Pierson
Commodity
Primary: Silver
Primary: Gold
Secondary: Copper
Location
State: Alaska
District: Chistochina
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
Alteration Type: L
Alteration Text: Oxidation of Cu minerals.
Rocks
Name: Limestone
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Triassic
Name: Limestone
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Triassic
Analytical Data
Not available
Materials
Ore: Gold
Ore: Chalcopyrite
Comments
Comment (Workings): Workings / Exploration = Grab sample assayed (MacKevett, 1976): 0.1 ppm Au (AA), 1.5 ppm Ag, 1,000 ppm As, 200 ppm Cu, 700 ppm Zn. Type of workings: surface.
Comment (Reference): Primary Reference = Moffit and Mertie, 1923
Comment (Deposit): Model Name = Lode: disseminated, shear zone
Comment (Geology): Geologic Description = Malachite-stained shear zone contains pyrite, chalcopyrite, and free gold. Shear zone, 1 m wide, occurs between Triassic Nikolai Greenstone and a brecciated latite dike, about 9 m thick, that intrudes along the contact of the Nikolai Greenstone and the Triassic Chitistone Limestone.
Comment (Commodity): Ore Material = Gold (native)
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Moffit, F.H., and Mertie, J.B., Jr., 1923, The Kotsina-Kuskulana district, Alaska: U.S. Geological Survey Bulletin 745, 149 p.
Reference (Deposit): MacKevett, E.M., Jr., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1418, scale 1:63,360.
Reference (Deposit): MacKevett, E.M., Jr., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1418, 1 sheet, scale 1:63,360.
Reference (Deposit): MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-773-B, scale 1:250,000.
Reference (Deposit): Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.
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