Mine detail: Pleasant Valley Mine

Previously called ''

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Location

Lat / long:

43.72163, -103.6814

Resource(B)

Primary:	Feldspar
Secondary:	Beryllium
Ore:	Beryl, Feldspar
Gangue:	Columbite, Mica, Quartz, Tantalite, Tourmaline
Orebody form:	DIKE

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Last production ended:	1943

Geology

Host type:	Pegmatite
Associated type:	Pegmatite

References

MRDS	D008120
DEP	10012474
Reference	{Deposit:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.}{Deposit:: ROBERTS, W. L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18.}{Deposit:: USGS PP 247, P. 177-178.}
Reporter	Barari, Rachel A.