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Location: 30 km NW from Ndola, DRC
238 Route Likasi Commune Annexe Province Haut KatangaLubumbashiDRC
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According to the Technical Report 2005: The Frontier deposit is hosted within veined and altered sediments of the KatangaSupergroup, and is located in the southeastern extension of the Lufilian arc, a fold thrust beltof Neoproterozoic age. The stratigraphic location of the copper mineralisation ispredominantly within shales and conglomerates (the Grand Conglomerate) of the NgubaGroup. The shales unconformably overlie an Upper Roan subgroup dolomite, which hasbeen intersected in many of the drill holes, and underlie a second Ngubu Group dolomite unit.The deposit is interpreted to be contained within a shallow south eastwardly plunging, north eastward dipping, overturned anticline, with the thickest mineralisation developed in the nose region of this fold. Alteration associated with mineralisation comprises sodic metasomatism, silicification and dolomitisation.There is considerable faulting, which has been interpreted as predominantly parallel to strike. A major fault, referred to as the ‘A’ fault has considerable vertical displacement and form the westerly bounding fault for most of the deposit. There are several other fault sets, although there is not always displacement along these faults. The faults also affect the depth of oxidation, particularly the ‘A’ fault, where the weathering profile is significantly deeper.Mineralization at Frontier is sediment hosted and epigenetic in style. It occurs higher in the stratigraphy than traditional Copperbelt deposits.Mineralization is hosted by altered Ngubu shales and within the uppermost portion of the Grand Conglomerate polymictic breccia also known as a diamictite. Copper occurs as chalcopyrite with minor bornite, and their oxidation and enrichment products in cross cutting quartz – albite -carbonate stockworks, veins, veinlets and breccias, and as foliation parallel disseminations in highly deformed and altered shales and underlying diamictite.
