The Unnamed (on Tin Creek, tributary to Lost River) is a beryllium, tin, and fluorine-fluorite 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
Elevation:
Commodity: Beryllium, Tin, Fluorine-Fluorite
Lat, Long: 65.459, -167.12300
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Unnamed (on Tin Creek, tributary to Lost River) MRDS details
Site Name
Primary: Unnamed (on Tin Creek, tributary to Lost River)
Commodity
Primary: Beryllium
Primary: Tin
Primary: Fluorine-Fluorite
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: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Sn skarn
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Calc-silicate, magnetite, and fluorite replacement of limestone
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Cassiterite
Ore: Chrysoberyl
Ore: Fluorite
Ore: Helvite
Gangue: Idocrase
Gangue: Magnetite
Gangue: Mica
Comments
Comment (Exploration): Status = Inactive
Comment (Geology): Ore Material = sulfide minerals
Comment (Geology): Age = the age of the mineralization is assumed to be related to the development of tin systems in the Lost River area and therefore Late Cretaceous, the age of the tin-mineralizing granites there (Hudson and Arth, 1983).
Comment (Reference): Primary Reference = Sainsbury, 1963; Sainsbury, 1969
Comment (Reserve-Resource): Reserves = Not defined
Comment (Workings): Workings / Exploration = A few surface pits and trenches are present in the area.
Comment (Geology): Geologic Description = The headwaters of Tin Creek are in an area where a small stock of biotite granite, the Tin Creek stock (Sainsbury, 1969; Hudson and Arth, 1983) intrudes Orovician limestone and dolomite. The Tin Creek stock covers a 1,000 by 2,000 foot area on the crest of the rounded hill between Tin Creek and its northern tributary. The south contact of the stock is irregular and includes granite offshoots, dikes, and apophyses in the bordering carbonate rocks. Two types of mineralization are present in the carbonate country rocks on the south flank of the Tin Creek stock: (1) laminar magnetite-fluorite- idocrase skarn (wrigglite) with helvite, and (2) fluorite-diaspore-white mica veins and replacements that contain chrysoberyl. The laminar skarn forms replacement veins along fractures in limestone and larger irregular bodies adjacent to granite intrusions. The fluorite-diaspore-white mica-chrysoberyl veins, from less than an inch up to a few feet wide, are scattered through limestone and localized along borders to granite dikes. They contain cassiterite, stannite, and other sulfide minerals in places. Oxidation of the sulfide-bearing veins has produced gossanous materials at the surface. The helvite-bearing skarn is reported to carry up to 0.45% BeO (Sainsbury, 1969, p. 80). Three samples of beryllium-bearing veins contained 0.13 to 1.11% BeO (Sainsbury, 1963, p. 13). Samples of skarn from this area contained 1,020 to 4,500 ppm tin and more than 20,000 ppm fluorine; one of these samples contained 175 ppb gold (Hudson, 1983).
Comment (Deposit): Model Name = Veins and tactite in limestone intruded by granite. Tin skarn model (14b) of cox and Singer (1986).
Comment (Commodity): Gangue = white mica
References
Reference (Deposit): Sainsbury, C.L., 1969, Geology and ore deposits of the central York Mountains, western Seward Peninsula, Alaska: U.S. Geological Survey Bulletin 1287, 101 p.
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., 1983, Interim report on the Lost River district, Seward Peninsula, Alaska: Anchorage, Alaska, Anaconda Minerals Company internal report (Report held by Cook Inlet Region, Inc., Anchorage, Alaska).
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): 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): Sainsbury, C.L., 1963, Beryllium deposits of the western Seward Peninsula, Alaska: U.S. Geological Survey Circular 479, 18 p.
The Top Ten Gold Producing States
These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.
