From this description of rocks units and also the younger granite intrusion. The basement complex is commonly described under three lithologic groups.
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Implications on provenance and evolution 99 22 the magmatite gnessic complex this geotectonic complex which constitutes over 75 of the surface area of the south western nigerian basement complex is said to have evolved through 3 major geotectonic events.
The basement complex of nigeria. Geology and evolution of the nigerian basement complex nigeria is almost equally divided between crystalline basement rocks and cretaceous to quaternary sediments and volcanics. 12 and south of the tuareg shield black 1980. The younger metasediments contain most of the gold deposits in nigeria in the northwest around maru and anka and at zuru.
The nigerian basement complex forms a part of the pan african mobile belt and lies between the west african and congo cratons fig. The nigeria basement complex have been conformed to comprise of three major rock units of which are. A migmatite gneiss complex mgc the schist belts and older granites suites fig.
The geology of nigeria formed beginning in the archean and proterozoic eons of the precambrianthe country forms the nigerian province and more than half of its surface is igneous and metamorphic crystalline basement rock from the precambrian. Older granites are widespread throughout the basement complex and occur as large circular masses within the schists and the older migmite gneiss complexes. Near kaduna and also at llesha in southwestern nigeria.
The basement complex rocks in the study area have received very little attention from researchers as evidenced in literature. The basement complex is one of the three major litho petrological components that make up the geology of nigeria fig. Complex rocks in south western nigeria.
Much of the information on the area is contained in geological maps of nigeria produced by the geological survey of nigeria okezie 1974 okezie 1984 ojo 1994 and malomo 2004. Migmatite gneiss migmatite gneiss the schist belt and older granite and younger granite complexes and all of these are seen in different location of the studied area.
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