ion (BIF) of Proterozoic volcano-sedimentary sequence (supracrustal) of age 2.5-2.4Ga, 2.2 - 2.06Ga and 2.0Ga. Thus, Complex genetic process has a control over the mineralogical and geochemical attribute of the iron ore, associated rocks and their host rocks. The.The main iron ore deposits in Liberia and neighbouring countries. Liberia – an under-explored West African iron ore region A major historic iron ore producer — Africa’s leading producer in the 1970s. Approximately 65 per cent of Liberia is underlain by Archean rocks, the world’s main source of iron ore.Vertical roller mills for iron ore grinding in somalia. Vertical Roller Mill For Cement Clinker Somalia,Vertical Roller Mill For Cement Clinker Somalia Vertical roller mill are widely used in grinding nonflammable and nonexplosive materials under 93the mohs hardness such as grinding quartz feldspar calcite talcum barite fluorite iron ore copper ore quartz slag cement clinker zircon sand fly.