Geochemical Classification and Geotectonic Setting of Granitic Gneisses from Southeastern Margin of Western Nigeria Basement

查看全文 作　　者：Mohammed Olatoye [1]Adepoju;Yinusa Ayodele Asiwaju-[1]Bello

机构地区：[1]Department of Applied Geology,The Federal University of Technology,Akure,Nigeria

出　　处：《Journal of Geological Research》索引2021年第3卷第2期,共6页

摘　　要：Chemical whole-rock major oxides and some trace element analyses were done on granitic-gneiss rocks from Dagbala-Atte District,located on the southeastern margin of western Nigeria Basement Complex.This was meant to classify the rocks and to understand the tectonic setting in order to evaluate their crustal evolution.The chemical analyses were done using inductively-coupled plasma mass spectrometer.From the results obtained,these rocks classified into calc-alkaline to shoshonite series with metaluminous to peraluminous varieties.They are I-type granitoids of feroan composition.The granitic gneisses formed from metamorphism of granite and granodiorite.Tectonically,most of the rock samples plotted in the field of island arc,continental arc and continental-collisional granitoids,which indicated that the protolith granite and granodiorite are orogenic and are arc related inferring arc tectonic setting. 关键词：Migmatite-gneiss-quartzite complex GRANITOID PROTOLITH CALC-ALKALINE Dagbala-Atte district

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Geochemical Classification and Geotectonic Setting of Granitic Gneisses from Southeastern Margin of Western Nigeria Basement

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