Geology and Economic Potentials of Migmatites Around Raddi Area, Part of Kafin Madaki Se, Ganjuwa Lga Bauchi State

H. H. Jumare; A. I. Haruna; U. S. Umar; A. I. Jibrn; A. M. Hassan; A. A. Abdullahi

doi:10.56201/ijaes.vol.12.no5.2026.pg16.30

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Geology and Economic Potentials of Migmatites Around Raddi Area, Part of Kafin Madaki Se, Ganjuwa Lga Bauchi State

H. H. Jumare, A. I. Haruna, U. S. Umar, A. I. Jibrn, A. M. Hassan, A. A. Abdullahi

Abstract

The study area, located within the Kafin Madaki Sheet 128 S.E of the Nigerian Basement Complex, is predominantly underlain by migmatite rocks formed through high-grade metamorphism and partial melting of pre-existing rocks. This study focuses on the field relationships, petrography, and morphological characteristics of the migmatites and associated lithologies in the area in order to understand their origin and tectono-metamorphic evolution. Geological mapping, field observations, and petrographic analyses were carried out on representative rock samples collected across the study area. The major lithological units identified include stromatic metatexites, diatexites, pegmatitic leucosomes, and basaltic dykes. Field relationships show that the stromatic metatexites are the dominant rock type and preserve distinct banding and foliations, indicating moderate partial melting and strong ductile deformation. The diatexites occur as massive and weakly foliated rocks with homogenized textures, reflecting higher melt fractions and advanced stages of migmatization. Pegmatitic leucosomes occur as coarse-grained veins and sills cutting across the migmatitic host rocks, suggesting emplacement from late-stage felsic melts, while the basaltic dykes represent younger mafic intrusions that postdate the migmatization events. Petrographic studies reveal that the rocks are composed mainly of quartz, feldspar, biotite, muscovite, sillimanite, and opaque minerals. Quartz grains commonly display undulose extinction, while biotite exhibits strong pleochroism and preferred orientation, indicating deformation under high-temperature conditions. The presence of sillimanite suggests amphibolite- to granulite-facies metamorphism. The study concludes that the migmatites in the Raddi area evolved through progressive partial melting, deformation, and recrystallization of pre-existing crustal rocks during the Pan-African tectono-metamorphic event.

References

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Geology and Economic Potentials of Migmatites Around Raddi Area, Part of Kafin Madaki Se, Ganjuwa Lga Bauchi State

Abstract

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