Figure F17. Fe2+-Ti-Fe3+ variation of coexisting ilmenite and titanomagnetite. The ilmenite (il)-hematite (he) and ulvöspinel (ulv)-magnetite (mt) solid solution series are shown with the range of coexisting ilmenite and titanomagnetite pairs of the oxide gabbros. The Fe3+ and Fe2+ were calculated by assuming stoichiometry.

Figure F17. Fe²⁺-Ti-Fe³⁺ variation of coexisting ilmenite and titanomagnetite. The ilmenite (il)-hematite (he) and ulvöspinel (ulv)-magnetite (mt) solid solution series are shown with the range of coexisting ilmenite and titanomagnetite pairs of the oxide gabbros. The Fe³⁺ and Fe²⁺ were calculated by assuming stoichiometry.