Structural Geology of Oke-Awun Rocks, Southwestern Nigeria
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Date
2015
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Published by Faculty of Pure and Applied Science, Ladoke Akintola University of Technology, Ogbomoso
Abstract
Rocks found in Oke-Awun area include older units of gneisses; migmatitic gneisses, augen gneisses, metasediment; quartz-biotite-muscovite schists, and quartzites and amphibolites which have been intruded by granites, granodiorites and pegmatites of probable Pan African (ca 600 Ma) age. Three episodes of deformation have been recognized in the area. The first deformation (D1) was associated with the development of penetrative foliation in the metamorphic rocks. The second deformation (D2) gave rise to asymmetric folds in the migmatitic gneisses and quartz-biotite- muscovite schists which locally deformed D1. The third deformation (D3) involved the formation of transcurrent faults which cuts all the rocks in the area. The metamorphic rocks have been deformed into a NNE-SSW trending synform and cut by two major approximately N-S trending sub-parallel dextral transcurrent faults.
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Transcurrent fault, Synform, Dextral, Asymmetric fold