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Ropes Gold Mine, Ishpeming Greenstone belt (Marquette Greenstone belt), Marquette Co., Michigan, USA

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Detailed Mineral List:


Antigorite
Formula: Mg3(Si2O5)(OH)4
Reference: Rocks & Min.: 58:112.
'Bravoite'
Formula: (Fe,Ni)S2
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Brucite
Formula: Mg(OH)2
Reference: Rocks & Min.: 58:112.
Calcite
Formula: CaCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Chalcopyrite
Formula: CuFeS2
Reference: Rocks & Min.: 58:112.
Dolomite
Formula: CaMg(CO3)2
Reference: Rocks & Min.: 58:112.
Dyscrasite
Formula: Ag3Sb
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
'Electrum'
Formula: (Au, Ag)
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Fluorite
Formula: CaF2
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Galena
Formula: PbS
Reference: Rocks & Min.: 58:112.
Gersdorffite
Formula: NiAsS
Reference: Robert C. Smith, II Ph.D, P.G.
Gold
Formula: Au
Reference: Rocks & Min.: 58:112.
'commodity:Gold'
Formula: Au
Reference: From USGS MRDS database
Millerite
Formula: NiS
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Molybdenite
Formula: MoS2
Reference: Rocks & Min.: 58:112.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Rocks & Min.: 58:112.
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Nickeline
Formula: NiAs
Reference: Robert C. Smith, II Ph.D, P.G.
Powellite
Formula: Ca(MoO4)
Reference: Rocks & Min.: 58:112.
Pyrite
Formula: FeS2
Reference: Rocks & Min.: 58:112.
Pyrrhotite
Formula: Fe7S8
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Quartz
Formula: SiO2
Reference: Rocks & Min.: 58:112.
Rutile
Formula: TiO2
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Scheelite
Formula: Ca(WO4)
Reference: Rocks & Min.: 58:112.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Rocks & Min.: 58:112.
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
'Serpentine Subgroup var: Picrolite'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Silver
Formula: Ag
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Sphalerite
Formula: ZnS
Reference: Rocks & Min.: 58:112.
Spinel
Formula: MgAl2O4
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Talc
Formula: Mg3Si4O10(OH)2
Reference: Rocks & Min.: 58:112.
Tetrahedrite
Formula: Cu6[Cu4(Fe,Zn)2]Sb4S13
Reference: Rocks & Min.: 58:112.
Tetrahedrite var: Argentian Tetrahedrite
Formula: Cu6[Cu4(Fe,Zn)2]Sb4S13
Description: Collected by Travis Olds 2008
Reference: Travis Olds Collection
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson

References

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 1086.
Economic Geology (1945), Geology of the Ropes Gold Mine, Marquette County, Michigan (March 1945): 40(2): 115-128.
Rocks & Minerals (1983): 58: 112.
Fountain, D.R. (1992), "Michigan Gold: Mining in the Upper Peninsula," Lake Superior Port Cities Inc., Duluth, MN.

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