Figure 4. Perovskite segregations in rocks of the alkaline ultramafic series (backscattered electrons raster photomicrographs): a - primary perovskite (Prv) in olivine (Ol) from Kovdor dunite, sample 4/400; b - secondary perovskite overgrown on magnetite (Mag) and melilitolite + phlogopite (Phl) grains, Kovdor, sample 252/100.