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 10:90 split respectively.
Approximate Mineral and Chemical Composition
The samples are a combination of UG2 and Merensky Reefs with a 10:90 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 3.30 0.20 g/t
Au Pb Collection 3.51 0.35 g/t
Ir NiS 1.90 0.18 g/t
Pd NiS 34.95 1.9 g/t
Pd Pb Collection 34.70 2.9 g/t
Pt NiS 83.41 2.5 g/t
Pt Pb Collection 80.48 11 g/t
Rh NiS 5.91 0.33 g/t
Ru NiS 10.20 0.80 g/t
Co 4A_MICP 755 8 ppm
Co FUS 797 27 ppm
Cu 4A_MICP 2.12 0.038 %
Cu FUS 2.09 0.055 %
Ni FUS 3.11 0.12 %
Mn 4A_MICP 1569 58 ppm
Calculated 3E (Pb Collection) = Gold + Palladium + Platinum = 118.69 g/t
Calculated 6E (NiS) = Gold + Iridium + Palladium + Platinum + Rhodium + Ruthenium = 139.67 g/t
Major Oxides
Certified Concentrations (at two Standard Deviations)
Cr2O3 FUS 0.37 0.02 %
Cr2O3 XRF 0.34 0.05 %