Description
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Origin of Material:
This is a low grade Platreef material from the Bushveld complex. The material was supplied by Anglo Platinum from Mogalakwena Mine. The lowermost Bushveld unit over much of the limb is the upper sections of the Critical Zone. A sulphide bearing composite pyroxenite layer of variable thickness occurring near the base of the main layered mafic mass is known as the Platreef and hosts the important PGE deposits with associated Cu & Ni at Mokopane where it rests on basement.
Approximate Mineral and Chemical Composition:
Platreef is a Pt/Pd/Ni/Cu ore. Mineralization in this Platreef comprises 2-5% disseminated or net textured magmatic sulphides, mainly pyrrhotite, pentlandite and chalcopyrite. The PGE’s occur as micron-sized satellite grains around but rarely within the sulphides.
Certified Concentrations
Analyte Method (μ) 11 ± (2s) Unit
Au NiS 0.112 0.0075g/t
Au Pb Collection 0.131 0.066g/t
Ir NiS 0.035 0.0090g/t
Pd NiS 1.00 0.11g/t
Pd Pb Collection 1.01 0.12g/t
Pt NiS 0.846 0.14g/t
Pt Pb Collection 0.837 0.13 g/t
Rh NiS 0.138 0.017 g/t
Rh Pb Collection 0.131 0.032 g/t
Ru NiS 0.146 0.016 g/t
C Combustion/LECO 1350 245ppm
LOI LOI 1.97 0.25%
SG SG 3.04 0.15 Dimensionless
Co 4A_MICP 84 4ppm
Cr FUS 4828 733ppm
Cu 4A_MICP 792 50ppm
Cu FUS 840 129ppm
Ni 4A_MICP 1586 124ppm
Ni FUS 1649 273ppm
Calculation 4E = Platinum (Pb Collection) + Palladium (Pb Collection) + Gold (Pb Collection) +
Rhodium (Pb Collection) = 2.109g/t
Calculation 6E = Platinum (NiS) + Palladium (NiS) + Gold (NiS) + Iridium (NiS)+ Ruthenium (NiS) +
Rhodium (NiS) = 2.277g/t
Major Oxides
Certified Concentrations (at two Standard Deviations) Analyte Method (μ) 11 ± (2s) Unit
Al2O3 XRF 12.60 0.39%
CaO XRF 6.66 0.21%
Cr2O3 FUS 0.71 0.1%
Cr2O3 XRF 0.66 0.05 %
Fe2O3 XRF 9.31 0.12%
K2O XRF 0.54 0.02%
MgO XRF 12.35 0.21%
P2O5 XRF 0.034 0.008%
SiO2 XRF 52.72 0.36%
TiO2 XRF 0.25 0.03%
