Mine detail: Ray Prospect

Previously called 'Ray Mica Prospect'

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Location

Lat / long:

43.69857, -103.63389

Resource(N)

Primary:	Mica
Ore:	Muscovite
Gangue:	Albite, Apatite, Biotite, Garnet, Quartz, Tourmaline
Orebody form:	DIKE
Discovery year:	1943

Production

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

Geology

Host type:	Schist,Pegmatite
Associated type:	Pegmatite,Granite

References

MRDS	D008115
DEP	10097815
Reference	{Deposit:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.}{Deposit:: USGS PP 247, P. 183.}{Production:: USBM INFO CIRC 7707, P. 153.}
Reporter	Barari, Rachel A.