Description
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Origin of Material
The standard is made from UG2 Reef Concentrate material supplied by Northam Platinum – Zondereinde.
Approximate Mineral and Chemical Composition
The UG2 chromite ore consists of fine to medium size cumulus chromite grains with substantial amounts of post-cumulus orthopyroxene crystals. The footwall is a coarse grained pegmatoidal pyroxenite with sporadic occurrences of chromite blebs, lenses and stringers. The hanging wall is predominantly fine to medium grained orthopyroxenite with three or more chromite stringers referred to as the UG2 leaders. The concentrates produced have had most of the chromite and some of the silicates removed.
Recommended Concentrations and Limits
Certified Concentrations (at two Standard Deviations)
Au NiS 0.952 0.23 g/t
Au Pb Collection 1.08 0.16 g/t
Ir NiS 8.91 1.8 g/t
Pd NiS 63.18 2.3 g/t
Pd Pb Collection 63.27 3.6 g/t
Pt NiS 118.39 4.7 g/t
Pt Pb Collection 117.94 8.1 g/t
Rh NiS 26.43 3.5 g/t
Ru NiS 36.93 2.8 g/t
4E FA_GRAV 209.14 25 g/t
Co FUS 296 31 ppm
Cr FUS 1.40 0.086 %
Cu FUS 4339 223 ppm
Fe 4A_MICP 8.94 0.36 %
Fe FUS 9.00 0.53 %
Ni FUS 8937 720 ppm
C Combustion/LECO 4397 594 ppm
S Combustion/LECO 2.08 0.049 %
SG SG 3.19 0.16 Dimensionless
Calculated 6E (NiS) = Gold + Iridium + Palladium + Platinum + Rhodium + Ruthenium= 254.792 g/t
Major Oxides
Certified Concentrations (at two Standard Deviations)
Cr2O3 FUS 2.03 0.072 %
Cr2O3 XRF 2.05 0.24 %
Al2O3 XRF 2.43 0.18 %
CaO XRF 2.46 0.080 %
MgO XRF 24.85 0.43 %
SiO2 XRF 47.28 2.4 %
