Origin of Material: This standard was made using ore sourced from Palabora Mining Company Limited. Palabora Mine is located next to the town of Phalaborwa in Mpumalanga Province, 380 kilometres north east of Johannesburg, South Africa. The Palabora alkali carbonatitic massif is an ovoid bicentered alkaline ring complex with a carbonatite core which was intruded as a vertical pipe into Archean granite prior to 2.06Ga. The Palabora complex is unique in that it hosts the only economic copper sulphide carbonatite orebody in the world.
Mineral and Chemical Composition: The host rocks are carbonatite and foskorite. Chalcopyrite is the most abundant ore mineral followed by bornite. Chalcocite is a subsidiary sulphide in the foskorite. Other sulphides are valleriite, cubanite and pyrhotite (minor). Other important mineral by-products are titaniferous magnetite and apatite. Uranothorite is also recovered.
Recommended Concentrations and Limits
(at two Standard Deviations)
Au Pb Collection 0.41 ± 0.04 g/t
Cu Fus 5829 ± 293 ppm
Cu M/ICP 5780 ± 459 ppm
Cu P 5717 ± 246 ppm
Specific Gravity 3.24 ± 0.10
Co M/ICP 88 ± 13 ppm
Co P 82 ± 14 ppm