Description
Louis Stratton And Francis Michaud
Commodities
PrimaryMica
Commodity typeN
Deposit
Deposit sizeS
WorkingsSurface/Underground
Orebody formLENTICULAR TO TABULAR
Ore controlMuscovite Concentrations Are Near One Or Both Wallx
Materials
Ore mineralsMica
GangueOligoclase, Quartz, Sillimanite, Tourmaline
Geology
Host rockQuartzite,Mica Schist
Associated rockGneiss,Pegmatite
Economic & production
Development statusPast Producer
First production1943
Last production1944
Discovery year1943
Identification
Deposit ID10012455
MRDS IDD008095
Alternate namesRuby Reef No. 1Ruby Reef
RegionNA
Data scoreB
Coordinates43.69302, -103.60917
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.USGS PP 247, P. 186-188.ROBERTS, W.L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS: SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18.USGS PP 247, P. 186.