Description
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Origin of Material
The standard is made from Merensky Reef Concentrate material supplied by Northam Platinum – Zondereinde.
Approximate Mineral and Chemical Composition
This material is predominantly or wholly derived from Merensky Reef which comprises components of feldspathic pyroxenite, pyroxenite and anorthosite. Peak PGE values are associated with a thin chromitite stringer. Mineralization in this Merensky Reef comprises 2-5% disseminated or net textured magmatic sulphides, predominantly pyrrhotite, pentlandite, chalcopyrite and pyrite. The PGE’s occur as micron-sized satellite grains around but rarely within the sulphides.
Recommended Concentrations and Limits
Certified Concentrations (at two Standard Deviations)
Au NiS 1.24 0.20 g/t
Au Pb Collection 1.34 0.22 g/t
Ir NiS 2.16 0.42 g/t
Pd NiS 24.67 2.1 g/t
Pd Pb Collection 24.99 2.2 g/t
Pt NiS 42.59 3.2 g/t
Pt Pb Collection 44.10 3.1 g/t
Rh NiS 6.29 1.1 g/t
Ru NiS 10.16 1.1 g/t
Co 4A_MICP 386 31 ppm
Co 4FUS 413 37 ppm
Cr FUS 1.52 0.16 %
Cu 4A_MICP 8356 657 ppm
Cu FUS 8694 452 ppm
Fe 4A_MICP 13.14 0.35 %
Fe FUS 13.65 0.99 %
Ni 4A_MICP 1.27 0.067 %
Ni FUS 1.32 0.11 %
C Combustion/LECO 4576 698 ppm
S Combustion/LECO 3.79 0.18 %
S FUS 3.73 0.27 %
SG SG 3.28 0.090 Dimensionless
Al FUS 2.52 0.27 %
Bi 4A_MICP 3 0.7 ppm
Cs 4A_MICP 0.3 0.2 ppm
Cs FUS 0.3 0.1 ppm
Ga FUS 7 1 ppm
Hf 4A_MICP 0.4 0.07 ppm
La 4A_MICP 3 0.5 ppm
Pb 4A_MICP 100 12 ppm
Rb 4A_MICP 3 0.4 ppm
Sb 4A_MICP 2 0.7 ppm
Sc 4A_MICP 23 7 ppm
Si FUS 21.11 2.1 %
Sn 4A_MICP 1 0.2 ppm
Sr FUS 54 7 ppm
Th 4A_MICP 0.8 0.4 ppm
Th FUS 0.8 0.2 ppm
Ti FUS 1636 340 ppm
Tl 4A_MICP 0.1 0.03 ppm
U 4A_MICP 0.3 0.1 ppm
V FUS 202 57 ppm
W 4A_MICP 2 0.4 ppm
Y FUS 4 0.6 ppm
Calculated 6E (NiS) = Gold + Iridium + Palladium + Platinum + Rhodium + Ruthenium= 87.11g/t
Major Oxides
Certified Concentrations (at two Standard Deviations)
Cr2O3 FUS 2.21 0.12 %
Cr2O3 XRF 2.25 0.034 %
Al2O3 XRF 4.60 0.21 %
CaO XRF 4.03 0.10 %
Fe2O3 XRF 19.60 0.75 %
MgO XRF 20.61 0.32 %
MnO XRF 0.17 0.02 %
SiO2 XRF 40.74 2.7 %
TiO2 XRF 0.30 0.04 %
