The Quartz Creek (Ear Mountain area) 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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Quartz Creek (Ear Mountain area) MRDS details
Site Name
Primary: Quartz Creek (Ear Mountain area)
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 (Exploration): Status = Inactive
Comment (Workings): Workings / Exploration = A total of 5 churn-drill holes were completed on this creek (Mulligan, 1959, p. 20).
Comment (Geology): Geologic Description = Quartz Creek crosses the contact zone, and has headwaters in, the Ear Mountain granite stock (Sainsbury, 1972). 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. Three USBM churn-drill holes were completed at about 370 feet elevation and two were completed at about 680 feet elevation on this creek (Mulligan, 1959, p. 20). Coordinates for this occurrence are for the location at the lower elevation. These churn-drill holes encountered 3 to 6.5 feet of gravel. The lower part of the gravel and adjacent bedrock contained a trace of tin per cubic yard in two of the holes at 370 feet elevation. Minerals identified in samples here include quartz, calcite, oligoclase, orthoclase, garnet, diopside, and traces of pyrite, limonite, idocrase, tourmaline, epidote, chlorite, biotite, actinolite, and muscovite. Tin-bearing minerals were not identified (Mulligan, 1959, p. 30) although heavy mineral concentrates from this creek contained monazite, zircon, cassiterite, zenotime, apatite, and scapolite (Killeen and Ordway, 1955, p. 81-82).
Comment (Geology): Age = Quaternary
Comment (Deposit): Model Name = Alluvial tin placer (Cox and Singer, 1986; model 39e)
Comment (Reference): Primary Reference = Mulligan, 1959 (USBM RI 5493)
Comment (Reserve-Resource): Reserves = Not defined
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): 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): 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): 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): 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.
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., 1975, Tungsten occurrences in Alaska: U.S. Geological Survey Mineral Investigations Resource Map MR-66, 1 sheet, scale 1:250,000.
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