Mine detail: Elkhorn Mine

Previously called 'Tinsley Mine'

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Location

Lat / long:

43.7469, -103.51667

Resource(B)

Primary:	Feldspar, Mica, Beryllium
Ore:	Beryl, Feldspar, Mica
Gangue:	Andalusite, Cleavelandite, Muscovite, Sillimanite, Tourmaline, Triphylite

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Last production ended:	1940

Geology

Host type:	Quartzite
Associated type:	Pegmatite

References

MRDS	SD02532
DEP	10055780
Reference	{Deposit:: USBM INFO CIRC 7707, P.}{Deposit:: SDSMT BULL 18}{Deposit:: USGS PP 247, P. 114-118.}{Production:: USBM INFO CIRC 7707, P. 103; USGS PP 247, P. 115}
Reporter	Barari, Rachel A.