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 0.274 0.062 g/t
Au Pb Collection 0.290 0.044 g/t
Ir NiS 0.115 0.0055 g/t
Pd NiS 2.09 0.12 g/t
Pd Pb Collection 2.17 0.23 g/t
Pt NiS 5.09 0.32 g/t
Pt Pb Collection 5.23 0.61 g/t
Rh Pb Collection 0.365 0.090 g/t
Ru NiS 0.642 0.037 g/t
Co 4A_MICP 98 11 ppm
Co FUS 110 14 ppm
Cu 44A_MICP 1137 77 ppm
Cu FUS 1126 32 ppm
Fe 4A_MICP 6.66 0.42 %
Ni FUS 2226 208 ppm
S 4A_MICP 0.52 0.08 %
SG SG 3.06 0.045 Dimensionless
Al 4A_MICP 7.84 0.13 %
Mn 4A_MICP 1245 26 ppm
Sr 4A_MICP 202 7 ppm
Zr 4A_MICP 11 0.8 ppm
Calculated 4E (Pb Collection) = Gold + Palladium + Platinum + Rhodium= 8.055 g/t
Calculated 5E (NiS) = Gold + Iridium + Palladium + Platinum + Ruthenium = 8.211 g/t
Major Oxides
Certified Concentrations (at two Standard Deviations)
Cr2O3 FUS 1.32 0.15 %
Cr2O3 XRF 1.35 0.034 %
