Description
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Origin of Material
The standard is made from floatation process samples from the Maseve Plant at Royal Bafokeng Platinum Mine in the Western Limb of the Bushveld Complex. The samples are a combination of UG2 and Merensky Reefs with a 40:60 split respectively.
Approximate Mineral and Chemical Composition
The samples are a combination of UG2 and Merensky Reefs with a 40:60 split respectively. The Merensky Reef comprises of feldspathic pyroxenite, pyroxenite and anorthosite. Mineralization in this reef comprises of 2-5% disseminated or net textured magmatic sulphides, predominantly pyrrhotite, pentlandite, chalcopyrite and pyrite. The PGEs occur as micron-sized satellite grains around but rarely within the sulphides. The UG2 chromite ore consists of fine to medium size cumulus chromite grains with substantial amounts of post-cumulus orthopyroxene crystals.
Recommended Concentrations and Limits
Certified Concentrations (At two Standard Deviations)
Au NiS 0.099 0.012 g/t
Au Pb Collection 0.103 0.032 g/t
Ir NiS 0.047 0.016 g/t
Pd NiS 0.413 0.033 g/t
Pd Pb Collection 0.391 0.083 g/t
Pt NiS 0.797 0.13 g/t
Pt Pb Collection 0.709 0.15 g/t
Rh NiS 0.118 0.014 g/t
Rh Pb Collection 0.115 0.025 g/t
Ru NiS 0.220 0.028 g/t
Co 4A_MICP 85 12 ppm
Cu 4A_MICP 207 24 ppm
Ni 4A_MICP 722 70 ppm
S 4A_MICP 0.11 0.01 %
S 4Combustion/LECO 0.10 0.02 %
SG SG 3.22 0.11 Dimensionless
Al 4A_MICP 7.46 0.81 %
K 4A_MICP 1974 53 ppm
Mg 4A_MICP 8.74 0.12 %
Mn 4A_MICP 1189 176 ppm
Na 4A_MICP 7404 176 ppm
Calculated 4E (Pb Collection) = Gold + Palladium + Platinum + Rhodium= 1.318 g/t
Calculated 6E (NiS) = Gold + Iridium + Palladium + Platinum + Rhodium + Ruthenium = 1.694 g/t
Major Oxides
Certified Concentrations (At two Standard Deviations)
Cr2O3 XRF 5.53 0.058 %
Al2O3 XRF 14.03 0.34 %
CaO XRF 7.02 0.093 %
Fe2O3 XRF 11.64 1.0 %
MgO XRF 14.57 0.11 %
Na2O XRF 1.01 0.017 %
SiO2 XRF 44.56 0.85 %
Uncertified Concentrations (At two Standard Deviation)
Cr2O3 FUS 5.0 1.6 %
