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Postmasburg manganese field, Northern Cape Province, South Africa

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Detailed Mineral List:
Aegirine
Formula: NaFe3+Si2O6
Reference: Minerals of South Africa
Localities: Recorded from at least 2 other localities in this region.
Alabandite
Formula: MnS
Reference: Collection Elmar Lackner
Photo: © Simone Citon. Alabandite from Postmasburg manganese field, Northern Cape Province, South Africa
Albite
Formula: NaAlSi3O8
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
Amesite
Formula: Mg2Al(AlSiO5)(OH)4
Localities: Magoloring farm, Postmasburg manganese field, Northern Cape Province, South Africa
Bishop farm, Postmasburg manganese field, Northern Cape Province, South Africa
Japie's Rust, Postmasburg manganese field, Northern Cape Province, South Africa
Armbrusterite
Formula: K5Na7Mn15[(Si9O22)4](OH)10 · 4H2O
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
Banalsite
Formula: BaNa2[Al2Si2O8]2
Reference: Minerals of South Africa
Baryte
Formula: BaSO4
Localities: Kapstewel, Postmasburg manganese field, Northern Cape Province, South Africa
Gamagara Ridge, Gloucester Farm, Postmasburg manganese field, Northern Cape Province, South Africa
Bixbyite
Formula: Mn3+2O3
Localities: Reported from at least 8 localities in this region.
Photo: © Elmar Lackner. Bixbyite from Postmasburg manganese field, Northern Cape Province, South Africa
Braunite
Formula: Mn2+Mn3+6(SiO4)O8
Reference: Minerals of South Africa; Schaller W T, Carron M K, Fleischer M (1967) Ephesite, Na(LiAl2)(Al2Si2)O10(OH)2, a trioctahedral member of the margarite group, and related brittle micas, American Mineralogist, 52, 1689-1696
Localities: Recorded from at least 7 other localities in this region.
Calcite
Formula: CaCO3
Reference: Minerals of South Africa
'Chert'
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
Cryptomelane
Formula: K(Mn4+7Mn3+)O16
Reference: Minerals of South Africa
Diaspore
Formula: AlO(OH)
Reference: ; Minerals of South Africa; Schaller W T, Carron M K, Fleischer M (1967) Ephesite, Na(LiAl2)(Al2Si2)O10(OH)2, a trioctahedral member of the margarite group, and related brittle micas, American Mineralogist, 52, 1689-1696
Localities: Recorded from at least 7 other localities in this region.
Photo: © Elmar Lackner. Diaspore from Glosam Mine, Postmasburg manganese field, Northern Cape Province, South Africa
Diaspore var: Mangan-diaspore
Locality: Glosam Mine, Postmasburg manganese field, Northern Cape Province, South Africa
Photo: © Leon Hupperichs. Mangan-diaspore from Glosam Mine, Postmasburg manganese field, Northern Cape Province, South Africa
Ephesite
Formula: LiNaAl2(Al2Si2O10)(OH)2
Reference: ; Minerals of South Africa; Schaller W T, Carron M K, Fleischer M (1967) Ephesite, Na(LiAl2)(Al2Si2)O10(OH)2, a trioctahedral member of the margarite group, and related brittle micas, American Mineralogist, 52, 1689-1696
Localities: Recorded from at least 3 other localities in this region.
Photo: © Peter Kohorst. Ephesite from Gamagara Ridge, Gloucester Farm, Postmasburg manganese field, Northern Cape Province, South Africa
Gamagarite (TL)
Formula: Ba2Fe3+(VO4)2(OH)
Type Locality: Gamagara Ridge, Gloucester Farm, Postmasburg manganese field, Northern Cape Province, South Africa
Reference: Amer.Min.(1943) 28, 329-335; The Manganese Adventure: The South African Manganese Fields
Localities: Recorded from at least 1 other locality in this region.
Gibbsite
Formula: Al(OH)3
Reference: Minerals of South Africa
Hausmannite
Formula: Mn2+Mn3+2O4
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
Photo: Hausmannite from Postmasburg manganese field, Northern Cape Province, South Africa
Hematite
Formula: Fe2O3
Reference: Minerals of South Africa
Localities: Recorded from at least 4 other localities in this region.
Hydroxylapatite
Formula: Ca5(PO4)3(OH)
Locality: Gamagara Ridge, Gloucester Farm, Postmasburg manganese field, Northern Cape Province, South Africa
Kaolinite
Formula: Al2(Si2O5)(OH)4
Locality: Paling farm, Postmasburg manganese field, Northern Cape Province, South Africa
Kentrolite
Formula: Pb2Mn3+2(Si2O7)O2
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
'K Feldspar'
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
Lithiophorite
Formula: (Al,Li)MnO2(OH)2
Reference: Minerals of South Africa
Localities: Recorded from at least 2 other localities in this region.
Photo: © Maggie Wilson. Lithiophorite from Gloucester Farm, Postmasburg manganese field, Northern Cape Province, South Africa
'Manganbixbyite'
Reference: Gaines (1991) Dana's New Mineralogy: The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana
'Manganese'
Formula: Mn
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
Manganite
Formula: Mn3+O(OH)
Reference: Minerals of South Africa
Norrishite ?
Formula: KLiMn3+2(Si4O10)O2
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
Opal
Formula: SiO2 · nH2O
Reference: Minerals of South Africa
'Partridgeite'
Formula: Mn2O3
Reference: Economic Geology (1996) 91:1435-1454
Localities: Recorded from at least 2 other localities in this region.
'Psilomelane'
Reference: Minerals of South Africa
Localities: Recorded from at least 1 other locality in this region.
Pyrolusite
Formula: MnO2
Reference: Minerals of South Africa
Pyrophyllite
Formula: Al2(Si4O10)(OH)2
Reference: Minerals of South Africa
Localities: Recorded from at least 1 other locality in this region.
Quartz
Formula: SiO2
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
Ramsdellite
Formula: Mn4+O2
Reference: Minerals of South Africa
Romanèchite
Formula: (Ba,H2O)2Mn5O10
Locality: Glosam Mine, Postmasburg manganese field, Northern Cape Province, South Africa
Sérandite
Formula: Na(Mn2+,Ca)2(HSi3O9)
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
Strontianite
Formula: SrCO3
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
Sugilite
Formula: K(Na,□)2Li3(Fe,Mn,Al,Zr)2[Si12O30]
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
Witherite
Formula: BaCO3
Locality: Borehole AKH49, Sishen, Kathu, Postmasburg manganese field, Northern Cape Province, South Africa
Zunyite
Formula: Al13Si5O20(OH,F)18Cl
Reference: Minerals of South Africa
Localities: Recorded from at least 3 other localities in this region.
Photo: Zunyite from Postmasburg manganese field, Northern Cape Province, South Africa


41 entries listed. 34 valid minerals. 1 (TL) - type locality of valid minerals.

References

Economic Geology (1996): 91: 1414-1434.

Cairncross, B, Beukes, N, Gutzmer, J (1997): The Manganese Adventure

Mineralogical Magazine (1997): 61: 213-231.

Mineral and/or Locality  
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