Mine detail: Beecher Lode

Previously called ''

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Location

Lat / long:

43.70274, -103.5775

Resource(B)

Primary:	Lithium, Beryllium, Mica
Secondary:	Niobium (Columbium), Tantalum
Ore:	Amblygonite, Beryl, Columbite, Mica, Spodumene, Tantalite
Gangue:	Albite, Apatite, Cassiterite, Cleavelandite, Lepidolite, Muscovite, Quartz, Tourmaline
Orebody form:	LENS
Discovery year:	1900

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer

Geology

Associated rock:	Pegmatite
Associated type:	Pegmatite
Tectonic:	Black Hills
Alteration processes:	Limonite Veinlets, The Stain Is Carried With Depth. The Pegmatite Is Badly Altered.

References

MRDS	SD02303
DEP	10055687
Reference	{Deposit:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707}{Deposit:: FISHER, D. J., 1945, PRELIMINARY REPORT ON THE MINERALOGY OF SOME PEGMATITES NEAR CUSTER, SOUTH DAKOTA GEOLOGICAL SURVEY REPORT OF INVESTIGATIONS 50.}{Deposit:: FISHER, D.J., 1942, PRELIMINARY REPORT ON SOME PEGMATITES OF THE CUSTER DISTRICT, SOUTH DAKOTA GEOLOGICAL SURVEY REPORT OF INVESTIGATIONS 44}{Deposit:: BIENIEWSKI, C.L., 1964, THE MINERAL INDUSTRY OF SOUTH DAKOTA IN 1962, SOUTH DAKOTA GEOLOGICAL SURVEY MINERALS REPORT 10}
Reporter	Barari, Rachel A.