Mine detail: Ann Mine

Previously called 'Gladys Wells Mine Gladys Nells Mine On the Map'

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Location

Lat / long:

43.65218, -103.55639

Resource(N)

Primary:	Mica
Ore:	Mica
Gangue:	Microcline, Oligoclase, Quartz
Orebody form:	IRREGULAR - 2 DIKES JOINED

Production

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

Geology

Host type:	Quartzite
Associated type:	Pegmatite
Tectonic:	Southern Black Hills

References

MRDS	D007188
DEP	10101682
Reference	{Deposit:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707}{Production:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.}
Reporter	Barari, Rachel A.