Material composition of calcite carbonatites of the kovdor massif that are potential industrial ores

Abstract

The Kovdor massif of alkaline, ultrabasic and carbonatite rocks is one of the brightest representatives in the family of similar complexes in Karelian-Kola region. This research presents the results of study material composition of ores that are located in the apatite-carbonate deposit at the SouthEastern part of the Kovdor massif. These ores are divided into basic technological classes according to the content of P2O5 in vol. %: poor (< 1,5), common (1,5–3) and rich (> 3). Mineralogical and petro-graphic studies were carried out using the optical, x-ray and electron microscopic methods. We have estimated relative abundances which allowed allocating main, minor and accessory minerals. The chemical composition of minerals has been determined. The crystalline forms of minerals, size of its and their textural and structural features have been described in this study. Accordingly, we have educed that above-named mineral characteristics are representative for deposit of this type.