Granulometry of magnetite and the changing mineral formation conditions atthe Itakpe iron ore deposit, Nigeria

Investigations were carried out to determine the effects of changing metamo rphic conditions on the formation of magnetite from the Itakpe iron ore dep osit. Various magnetite grain sizes from ferruginous quartzites from differ ent zones were determined and analyzed statistically. The results reflect t he reaction of mineral individuals. In particular, the granulometry of magn etite changed with changes in the mineral formation conditions in the depos it and carr elate with the mineralo-geochemical zones. This is interpreted as part of a readjustment of the mineral to the prevailing conditions. Beca use granulometry is a prebeneficiation parameter, this work will be, no dou bt, of importance to the exploitation and beneficiation of the quartzites a nd I-ich ores.