Mine detail: Grand Island Group

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Location: Pennington County, South Dakota, United States, North America
Lat / long: 43.90524, -103.42973
dep_id: 10010770
mrds_id: D004737
Commodity type: metallic
Major mineral: Gold, Silver
Operation type: Unknown
Deposit type: Vein
Production size: No production occurred
Development status: Occurrence
ore: Gold, Pyrite, Pyrrhotite, Silver
gangue: Quartz
work_type: Underground
ore_ctrl: Shear Zone
Reporter: Barari, Rachel A.
arock_unit: Diorite
arock_type: Diorite
References:
  • U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 770
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