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Location: 70 km N from Johannesburg, South Africa
Farm Elandsfontein 440 JQ, District of BritsPO Box 3436BritsSouth Africa0250
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The Rustenburg Layer Suite of the Bushveld Complex at Eland mine is similar to that within the broader south-eastern portion of the western limb but shows stratigraphic variation from west to east. The Critical Zone sequence, being fully developed in the west, thins within the far eastern portion of the property. This is similar to the southern portions of Booysendal and is also related to the Bushveld sequence abutting onto basement highs. The impact of this abutment manifests itself in disruption to the morphology and internal structure of the UG2 Reef. Despite this, both reefs are continuous across the property. This has led to the characterisation of three UG2 Reef sub-types (facies) transitioning from west to east as the Normal, Split and Zilkaats sub-type domains.Merensky ReefThe Merensky Reef is the upper mineralised portion of the 13 m thick Merensky pyroxenite, generally extending over 2 m to 3 m. The Merensky pyroxenite is immediately overlain by a sequence of competent norites. No facies have been defined, but surface morphology disruption is evident in the far east of the property. The Mineral Resource channel is defined as a fixed cut of 3 m below the hangingwall contact.UG2 ReefThe internal structure of the UG2 Reef is similar to that found in the remainder of the western limb, albeit thicker and lacking continuous chromitite stringers or leaders in the immediate hangingwall. Three reef facies have been defined; Normal, Split and Zilkaats. The UG2 Normal and Split facies consist of massive, upper Leader and lower Main seam chromitite layers with an average combined thickness of 160 cm. In the case of the Normal facies, these seams are vertically juxtaposed or merged. In the Split facies, the seams are separated by a 4E metal-barren, silicate waste parting of up to 120 cm thickness. The Zilkaats facies is defined where a massive Leader seam, with a mean thickness of 95 cm, overlies a lower, Main seam that comprises either a multitude of chromitite stringers or disseminated chromite within a variable interval of silicate rocks. This generally renders the lower seam sub-economic. The Mineral Resource channels applied are variable and dependent on both the facies and the UG2 chromitite thickness.UG1 ReefNo Mineral Resources have been declared for the UG1 Reef. However, the reef comprises two chromitite seams with a combined thickness of between 180 cm to 210 cm, separated by an internal silicate parting of between 20 cm and 370 cm. The UG1 Reef is bound by massive norite units in the hangingwall and footwall. The PGE grade across the chromitite seams is below 1 g/t 4E and concentrated along the top and basal contacts.
