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Clementine II pegmatite, Okatjimukuju farm (Friedrichsfelde farm), Karibib District, Erongo Region, Namibia

Located 18 kilometers ESE of Karibib. Well-zoned pegmatitic dyke hosted in calc-silicates rocks (foot wall) and dolomitic marbles (hanging wall) of the Upper Precambrian Damara sequence.

Zonation of the pegmatite:
- Wall zone: aplite (muscovite, quartz).
- Outer intermediate zone: aplite gives way to coarse-grained quartz-alkaline feldspar-muscovite association.
Microcline perthite towards the core.
- Intercalated zone: Early space filling with quartz-muscovite-feldspar pegmatite rich in beryl, columbite, amblygonite-montebrasite, apatite (Mn) and Fe-Mn phosphates.
Quartz-albite-muscovite rock (zonation of the pegmatite).
- Inner intermediate zone: Red microcline perthite (crystals up to 1 meter long) rimmed by muscovite. Quartz + muscovite in interstices.
- Replacement unit: pink/grey Li-mica with petalite, albite and microlite.
- Quartz core (milky quartz).

Refs.:
- Keller, P. & von Knorring, O. (1989): Pegmatites at the Okatjimukuju farm, Karibib, Namibia. Part I: Phosphate mineral associations of the Clementine II pegmatite. Eur. J. Mineral., 1, 567-593.
- Keller, P., Fontan, F., Velasco-Roldan, F., Melgarejo i Draper, J. C. (1997): Stanĕkite, Fe3+(Mn,Fe2+,Mg)(PO4)O: a new phosphate mineral in pegmatites at Karibib (Namibia) and French Pyrénées (France). European Journal of Mineralogy 9, 475-482.





Mineral List:
  • Albite
  • 'Alkali Feldspar'
  • Alluaudite
  • 'Amblygonite-Montebrasite Series'
  • Apatite-(CaF)
       var: Manganese-bearing Apatite-(CaF)
  • Arrojadite-(KFe)
  • Barbosalite
  • Bermanite
  • Beryl
  • Beyerite
  • Bismite
  • Bismuth
  • Bismutite
  • Cacoxenite
  • Collinsite
  • 'Columbite'
  • Dufrénite
  • Eosphorite
  • Ferrisicklerite
  • 'Ferrisicklerite-Sicklerite Series'
  • Gahnite
  • Heterosite
  • 'Heterosite-Purpurite Series'
  • Hureaulite
  • 'Jahnsite'
  • Kidwellite
  • Kryzhanovskite
  • Laueite
  • Lepidolite
  • Leucophosphite
  • Lipscombite
  • Microcline
  • Microlite
  • Mitridatite
  • Muscovite
  • 'Perthite'
  • Petalite
  • Phosphosiderite
  • Quartz
  • Rockbridgeite
  • Stanĕkite (TL)
  • Stewartite
  • Strunzite
  • Tavorite
  • Topaz
  • 'Tourmaline Group'
  • Triphylite
  • 'Triphylite-Lithiophilite Series'
  • Triplite
  • Uraninite
  • Whitlockite
  • Zwieselite


    53 entries listed. 42 valid minerals. 1 type locality (valid mineral).

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