Mine detail: Bullion Mine Pennington County

Previously called ''

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Location

Lat / long:

43.89829, -103.41945

Resource(M)

Primary:	Gold, Silver
Secondary:	Arsenic
Ore:	Chalcopyrite, Gold, Pyrrhotite
Gangue:	Ankerite, Biotite, Chlorite, Cummingtonite, Garnet, Graphite, Hornblende, Quartz, Sphalerite
Orebody form:	IRREGULAR LENTICULAR
Discovery year:	1877

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Last production ended:	1930

Geology

Associated type:	Diorite
Tectonic:	Southern Black Hills
Alteration processes:	Surface Ore Is Oxidized

References

MRDS	D007167
DEP	10101678
Reference	{Deposit:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 770}{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.