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Location: 20 km SW from Mokopane, South Africa
Constantia Office Park Cycad House, Ground Floor Block 17 Cnr 14th Avenue & Hendrik Potgieter RoadPO Box 976 Florida Hills 1716JohannesburgSouth Africa1709
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Deposit Type The Volspruit Reef has provisionally been classified as a disseminated, PGE-Cu-Ni, syn-genetic, ortho-magmatic deposit within the Lower Zone of the RLS. The deposit has been linked to a series of partially developed ultramafic magmas which progressively increase in Cu, Pt, and Pd towards the top of cyclic unit 10 and the first six metres of cyclic unit 11. Hulbert (1983) observed a sharp increase in iron (Fe) and oxygen fugacity (ƒO ) upwards 2 through cyclic units 10 to 11, which led to the conclusion that the Volspruit Reef was formed as a result of a younger more evolved magma intruding the Lower Zone and mixing with the ultramafic unit 10 magmas to provide the means for sulphur saturation and precipitation of PGMs alongside base metals in cyclic unit 11.MineralizationThe North Body deposit is displaced by a north-south trending fault termed the Magoga Fault, which has thrusted the deposit downwards towards the east. The deposit can be sub-divided into two main structural domains: a northern domain (North Body) and a southern domain (South Body). The northern domain represents a flat-lying and sub-cropping body that is overlain by subsequent cyclic units or regolith. The southern domain is the largest, deepest domain and appears as a graben structure bounded by inward stepping faults along its periphery.The Volspruit Reef mineralisation is predominantly interstitial disseminated to net-textured sulphide assemblages hosted within olivine and chrome bearing pyroxenites. The sulphide mineralisation within this horizon, in decreasing abundance, consists of pyrrhotite, pentlandite, chalcopyrite and cubanite, where the only noted platinum group mineral within this zone is sperrylite (Hulbert, 1983). Sulphide assemblages reach their peak modal abundance at approximately 3 wt.% of the whole rock composition. Mineralisation is predominantly hosted by fine-grained equigranular orthopyroxenites with minor olivine- and chrome- bearing occurrences.
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Steady state mining production is designed and planned to feed the mills with a capacity of 150,000 tonnes per month (ktpm).Detailed concentrator design and cost estimates will be completed in future, allowing for a Pre feasibility Study and Ore Reserve declaration.The business case is built on delivering and selling concentrate to a third-party smelter approximately 320 km away from the project location.
