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 0.193 0.057 g/t
Au Pb Collection 0.188 0.039 g/t
Ir NiS 0.103 0.035 g/t
Pd NiS 1.17 0.16 g/t
Pd Pb Collection 1.20 0.11 g/t
Pt NiS 2.49 0.44 g/t
Pt Pb Collection 2.57 0.29 g/t
Rh NiS 0.267 0.093 g/t
Rh Pb Collection 0.271 0.033 g/t
Ru NiS 0.470 0.19 g/t
Co 4A_MICP 96 10 ppm
Co FUS 119 33 ppm
Cu 4A_MICP 514 20 ppm
Cu FUS 495 89 ppm
Fe FUS 7.98 0.35 %
Ni 4A_MICP 1236 101 ppm
Ni FUS 1228 130 ppm
S Combustion/LECO 0.26 0.006 %
S 4A_MICP 0.27 0.007 %
SG SG 3.21 0.085 Dimensionless
Al 4A_MICP 7.00 0.39 %
K 4A_MICP 2138 303 ppm
Mn 4A_MICP 1106 59 ppm
Sr 4A_MICP 175 16 ppm
Zr 4A_MICP 21 3 ppm
Calculated 4E (Pb Collection) = Gold + Palladium + Platinum + Rhodium= 4.229 g/t
Calculated 6E (NiS) = Gold + Iridium + Palladium + Platinum + Rhodium + Ruthenium = 4.693 g/t
Major Oxides
Certified Concentrations (at two Standard Deviations)
Cr2O3 FUS 5.50 0.25 %
