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Tin Mountain Mine, Fourmile, Custer District, Custer Co., South Dakota, USA

Ref.: Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, U.S. Bureau of Mines Information Circular 8298: 32 (Table A-1).

Januzzi, R.E. and Seaman, David M. (1976) Mineral Localities Of Connecticut and Southern New York State and Pegmatite Minerals of the World.


Rocks & Minerals: 60: 117-118.


An Li-Cs-Be-niobium-tantalum-mica-quartz mine in pegmatite located in secs. 35, 36, T.3S., R.3E., at Fourmile near Custer.

Mineralization is an irregular, L-shaped, zoned pegmatite body in schist.

Workings include 12 open cuts, 2 tunnels and a shaft with 2 levels and stopes.





Map Reference: 43°44'49"N , 103°43'14"W

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Mineral List:
Albite
var: Andesine
Almandine
Amblygonite
Apatite-(CaF)
Aurichalcite
Autunite
Azurite
Beryl
var: Morganite
Biotite
Bismuth
Bismuthinite
Bornite
Calcite
Cassiterite
Chalcopyrite
'Columbite-Tantalite'
Cookeite
Covellite
Dawsonite
Ferrisicklerite
Fourmarierite
Goethite
Hemimorphite
Hydrozincite
Kasolite
Lepidolite
Limonite
Löllingite
Malachite
Meta-autunite
Microcline
Microlite
Montebrasite
Montmorillonite
Muscovite
Pollucite
Pyrolusite
Quartz
Siderite
Smithsonite
Sphalerite
Spodumene
var: Kunzite
Tantalite
Triphylite
Turquoise ?
Uraninite
Uranophane
Vandendriesscheite
Xenotime-(Y)
Zircon


53 entries listed. 45 valid minerals.

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Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in South Dakota, USA Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 24th Oct 2009 15:34:36