Description
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Origin of Material
This CRM was made from platreef material from the bushveld complex. The lowermost Bushveld unit over much of the limb is the upper sections of the Critical Zone. A sulphide bearing composite pyroxenite layer of variable thickness occurring near the base of the main layered mafic mass is known as the Platreef and hosts the important PGE deposits with associated Cu & Ni at Mokopane where it rests on basement
Approximate Mineral and Chemical Composition
Platreef is a Pt/Pd/Ni/Cu ore. Mineralization in this Platreef comprises 2-5% disseminated or net textured magmatic sulphides, mainly pyrrhotite, pentlandite and chalcopyrite. The PGE’s occur as micron-sized satellite grains around but rarely within the sulphides.
Recommended Concentrations and Limits
(at two Standard Deviations)
Certified Concentrations
Au Pb Collection 2.48 0.17 g/t
Pt Pb Collection 1.52 0.32 g/t
Pd Pb Collection 1.20 0.16 g/t
Au NiS 2.43 0.20 g/t
Pt NiS 1.51 0.31 g/t
Pd NiS 1.22 0.15 g/t
Rh NiS 0.083 0.02 g/t
Ir NiS 0.026 0.01 g/t
Ru NiS 0.10 0.03 g/t
Co 4A_MICP 142 9 ppm
Cu 4A_MICP 901 108 ppm
Cu FUS 897 86 ppm
Ni 4A_MICP 1440 128 ppm
Ni FUS 1457 169 ppm
Ni XRF 1443 148 ppm
S Comb/LECO 0.54 0.1 %
SG SG5 3.1 0.3 Dimensionless
Recommended Concentrations and Limits
(at two Standard Deviations)
Certified Concentrations
Analyte |
Method |
8Certified(µ) |
10Two Standard deviation (2s) ± |
Unit |
Au |
Pb Collection1 |
2.48 |
0.17 |
g/t |
Pt |
Pb Collection1 |
1.52 |
0.32 |
g/t |
Pd |
Pb Collection1 |
1.20 |
0.16 |
g/t |
Au |
NiS7 |
2.43 |
0.20 |
g/t |
Pt |
NiS7 |
1.51 |
0.31 |
g/t |
Pd |
NiS7 |
1.22 |
0.15 |
g/t |
Rh |
NiS7 |
0.083 |
0.02 |
g/t |
Ir |
NiS7 |
0.026 |
0.01 |
g/t |
Ru |
NiS7 |
0.10 |
0.03 |
g/t |
Co |
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