Petrography, Morphology and Geochemistry ofMigmatites around Dungal, Bauchi North-East Nigeria
Amina Ali, Ahmed Isah Haruna, Abdulmajid Isa Jibrin, Faisal Abdullahi, Tahir Garba.
Abstract
The general geology of rocks around Dungal was accessed with a view to classify the rocks and determined their tectonic origin using field relationship, petrography and geochemistry of the rocks. The rocks were classified as migmatite which were further sub divided into metatexite, diatexite and pegmatitic neosome. Geochemistry indicates that they are formed from mixtures of magmas, addition or subtraction of solid phases by contamination or fractional/partial melt crystallization. They are peraluminous and calc alkaline affinity which indicates that they from metasedimentary sources, also the high content of SiO2 (Na2O + K2O) and Al2O3, MgO, Fe2O3&CaO low concentration imply that the magma was derived from partial melting of the lower crustal rocks.
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