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 1.40 0.10 g/t
Au Pb Collection 1.54 0.41 g/t
Ir NiS 1.33 0.21 g/t
Pd NiS 19.39 1.2 g/t
Pd Pb Collection 19.41 1.3 g/t
Pt NiS 41.82 2.0 g/t
Pt Pb Collection 41.60 2.1 g/t
Rh NiS 3.98 0.53 g/t
Rh Pb Collection 4.07 1.3 g/t
Ru NiS 6.21 1.1 g/t
Co FUS 422 69 ppm
Cu FUS 8554 1188 ppm
Fe 4A_MICP 11.54 0.40 %
Fe FUS 11.46 0.75 %
Ni FUS 1.46 0.21 %
SG SG 3.12 0.18 Dimensionless
Al 4A_MICP 1.83 0.051 %
Ca 4A_MICP 2.06 0.045 %
Mn 4A_MICP 1220 72 ppm
Zn 4A_MICP 152 5 ppm
Calculated 4E (Pb Collection) = Gold + Palladium + Platinum + Rhodium= 66.62 g/t
Calculated 6E (NiS) = Gold + Iridium + Palladium + Platinum + Rhodium + Ruthenium = 74.13 g/t
Major Oxides
Certified Concentrations (at two Standard Deviations)
Cr2O3 FUS 0.76 0.1 %
