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The ultramafic rocks around Kizildag have very important economic reserves of chromite and olivine. The ultramafic rocks are mainly composed of dunites and in lesser amount diabases. The dunites are mainly made of forsteritic olivine which is about 90 \% of the rock mass. The chemical composition of the rock is as follows: MgO 52.25 \%, SiO2 37.5 \% and Fe2O3 8.3 \%. These mineralogical and chemical characteristics are met the need of iron-steel and refractory industry. The olivine deposits of Kizildag with 9 bill...