RMZ – MATERIALI IN GEOOKOLJE

350 Akinola, O. O., Talabi, A. O.are the Lokoja-Jakura, Toro-Gadabuikebelts (Muotoh et al 1988, Okunlola,2001). The geochemistry of these rocksconfirms their sedimentary nature butthat of associated mafic and ultrabasicrocks has generated much controversy.The Older Granites display the mostpervasive tectonic fabric symbolizingigneous reactivation attributableto the Pan-African events (Oyawoye,1964). The Older Granites in all casesinclude rocks of a wide range of compositions,structures and textures. TheOlder Granite is typically a fine-mediumgrained to coarse porphyritic rockwhose composition range from tonalitethrough granodiorite to granite and syenite.The lithological framework, deformationand metamorphism of thebasement rocks are established in theworks of Mccurry (1976), Ajibade(1976, 1980), Odeyemi (1988), Rahaman(1976, 1988), Egbuniwe (1982)and Elueze (1981). The geology ofIjero-Ekiti area has been reported in literatureas part of the basement complexof southwestern Nigeria by Mccurry(1976), Tuner (1983), Rahaman et al,(1988). This area is an Archaean-EarlyProterozoic terrain Grant (1970).Figure 1. Map showing Nigeria within the Pan-African province between Congo andWest African cratons (Ajibade et al, 1988)RMZ-M&G 2012, 59