The Pinnacle Creek is a tin 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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Pinnacle Creek MRDS details
Site Name
Primary: Pinnacle Creek
Commodity
Primary: Tin
Location
State: Alaska
District: Port Clarence
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: Alluvial placer Sn
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Cassiterite
Comments
Comment (Geology): Geologic Description = Pinnacle Creek crosses the contact zone of the Ear Mountain biotite granite stock. This is a Late Cretaceous (76.7 +/- 2.9 my; Hudson and Arth, 1983, p. 769) composite biotite granite that intrudes an impure and schistose carbonate sequence, with some metapelitic rocks, of unknown but probable Paleozoic age. The country rocks are variably converted to tactite and hornfels around the granite stock (Knopf, 1908, p. 28-29). .A USBM churn-drill in the lower part of the creek at an elevation of approximately 360 feet, returned 0.02 pounds of tin per cubic yard. A sample from this hole contained quartz, calcite, orthoclase, plagioclase, grossularite garnet, idocrase, pyrite, traces of blue tourmaline, brown tourmaline, and epidote. Cassiterite was also identified (Mulligan, 1959, p. 29). Pan concentrate material from the headwaters over granite bedrock contained cassiterite, monazite, zircon and 0.18% eU (Killeen and Ordway, 1955).
Comment (Workings): Workings / Exploration = One USBM churn-drill hole was completed on the lower part of the creek at approximately 360 feet elevation (Mulligan, 1959, p. 20).
Comment (Deposit): Model Name = Alluvial tin placer (Cox and Singer, 1986; model 39e)
Comment (Reference): Primary Reference = Killeen and Ordway, 1955; Mulligan, 1959 (USBM RI 5493)
Comment (Geology): Age = Quaternary
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Teller quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-587, 130 p.
Reference (Deposit): Mulligan, J.J., 1959, Tin placer and lode investigations, Ear Mountain area, Seward Peninsula, Alaska: U.S. Bureau of Mines Report of Investigations 5493, 53 p.
Reference (Deposit): Knopf, Adolph, 1908, Geology of the Seward Peninsula tin deposits, Alaska: U.S. Geological Survey Bulletin 358, 71 p.
Reference (Deposit): Cobb, E.H., 1975, Tungsten occurrences in Alaska: U.S. Geological Survey Mineral Investigations Resource Map MR-66, 1 sheet, scale 1:250,000.
Reference (Deposit): Hudson, T.L., and Arth, J. G., 1983, Tin-granites of Seward Peninsula, Alaska: Geological Society of America Bulletin, v. 94, p. 768-790.
Reference (Deposit): Sainsbury, C.L., 1972, Geologic map of the Teller quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Map I-685, 4 p., 1 sheet, scale 1:250,000.
Reference (Deposit): Killeen, P L., and Ordway, R.J., 1955, Radioactivity investigations at Ear Mountain, Seward Peninsula, Alaska, 1945: U.S. Geological Survey Bulletin 1024-C, p. 59-94.
Reference (Deposit): Cobb, E.H., and Sainsbury, C.L., 1972, Metallic mineral resource map of the Teller quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-426, 1 sheet, scale 1:250,000.
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