MICROSTRUCTURAL INTERPRETATION OF THE GARNET-SILLIMANITE-BEARING GRANITE GNEISS OF IKARE AREA, SOUTHWESTERN NIGERIA

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dc.creatorOziegbe, Olubukola, Oziegbe, O.
dc.date2023-05-10
dc.date.accessioned2025-04-15T11:55:12Z
dc.descriptionThis study presents microstructures from the granite gneiss of the Basement complex of southwestern Nigeria. The granite gneiss of Ikare area comprises of the mineral assemblage; garnet, biotite, K-feldspar, quartz, plagioclase, sillimanite and opaque minerals. K-feldspar porphyroblasts have cuspate interstitial quartz grains, also quartz grains are included in K-feldspar. Most K-feldspar grains are highly strained and in some cases are fractured. Prismatic and fibrolite-type sillimanite are both present. Biotite is closely associated with fibrolitetype sillimanite. Sillimanite was observed to mimic the foliation produced by biotite. K-feldspar is the dominant mineral and could have formed by the dehydration reaction of biotite + plagioclase + quartz + sillimanite " garnet + K-feldspar + melt. Microscopic structures such as strained feldspar grains, micro-fractures in Kfeldspar, simple twinning in K-feldspar, myrmekite, mimicking textures, microperthitic intergrowth and cuspate volumes of quartz surrounding K-feldspar are indicative of melt-bearing and solid-state deformation of regional metamorphic rocks.
dc.formatapplication/pdf
dc.identifierhttp://eprints.covenantuniversity.edu.ng/18261/
dc.identifier.urihttps://repository.covenantuniversity.edu.ng/handle/123456789/48757
dc.languageen
dc.subjectQH Natural history, QH301 Biology, QR Microbiology
dc.titleMICROSTRUCTURAL INTERPRETATION OF THE GARNET-SILLIMANITE-BEARING GRANITE GNEISS OF IKARE AREA, SOUTHWESTERN NIGERIA
dc.typeArticle

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