“…Yet, primary ore-forming and late-stage alteration processes have not been entirely characterised (Heinrich et al, 1970;Palabora Mining Company Ltd Staff, 1976;Vielreicher et al, 2000). Stable isotope (Fe and Cu) and trace element analysis on Cu-sulphides revealed the presence of a magmatic monosulphide solid solutionintermediate solid solution (iss -mss) system in the Loolekop carbonatite -phoscorite intrusion (Le Bras, 2020;Le Bras et al, 2021), but the mechanisms responsible for magmatic sulphide textures operating during the late stages of magma ascent remain unclear. Previous detailed research was made on the basis of optical and electron microscope observations, as well as electron microprobe analysis of Cu-sulphides on epoxy mounts and thin sections (Rudashevsky et al, 2004;Giebel et al, 2017).…”