Description
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AMIS 0253 Laboratory Proficiency Report
Origin of Material: This standard was made using Pt/Pd UG2 rich chromitite material supplied by Anglo Platinum Limited from the Western limb of the Bushveld Complex..
Mineral and Chemical Composition: The UG2 chromitite 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 chromitite blebs, lenses and stringers. The hanging wall is predominantly fine to medium grained orthopyroxenite with three or more chromitite stringers referred to as the UG2 leaders. The concentrates produced have had most of the chromitite and some of the silicates removed
Major element chemistry data from nineteen of the labs has been compiled and certified. Uncertified summary statistics for trace element data are set out in an appendix.
Recommended Concentrations and Limits
(at two Standard Deviations)
Certified Concentrations
Pt Pb Collection 4.03 ± 0.32 g/t
Pd Pb Collection 2.34 ± 0.18 g/t
Pt NIS 4.06 ± 0.28 g/t
Pd NIS 2.43 ± 0.28 g/t
Rh NiS 0.82 ± 0.08 g/t
Cu P 138 ± 12 ppm
Ni P 348 ± 24 ppm
Ni XRF 1359 ± 155 ppm
Specific Gravity 4.04 ± 0.18
Provisional Concentrations
Au Pb Collection 0.07 ± 0.01 g/t
Au NIS 0.06 ± 0.01 g/t
Ir NiS 0.30 ± 0.04 g/t
Ru NiS 1.36 ± 0.22 g/t
Co M/ICP 209 ± 53 ppm
Co P 16 ± 2.4 ppm
Cu M/ICP 134 ± 23 ppm
Ni M/ICP 1220 ± 168 ppm
Informational Mean
Cu XRF 132 ppm
