Geology and Petrology of Buji Younger Granite Complex of North Central Nigeria

A. O. Eragbe; A.I. Haruna; U.S. Umar; M. Wada; A.I. Jibrin; M.A. Hassan

doi:10.56201/ijgem.vol.12.no8.2026.pg112.129

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Geology and Petrology of Buji Younger Granite Complex of North Central Nigeria

A. O. Eragbe, A.I. Haruna, U.S. Umar, M. Wada, A.I. Jibrin, M.A. Hassan

Abstract

This study presents a comprehensive petrographic, and mineralogical evaluation of the Buji Younger Granite Complex in North-Central Nigeria, the Buji Younger Granite complex, five (5) major rock units were identified. Namely, Syenite, Nepheline Syenite, Biotite Granites, late and early rhyolites and fine and medium grained biotite granites. The complex comprises of plutonic rocks such as fine and medium grained biotite granites, riebeckite biotite granites and Buji biotite granites which showcases a distinctive mineral composition, primarily consisting of quartz, feldspar, and biotite mica as well as volcanic rocks such as the rhyolites which bears the most abundance in the study area. Most of the feldspars exhibit perthitic texture and sericitization in some cases. Quartz is well formed and visible to the naked eye in most granites. The volcanic rocks bear an almost glassy texture referred to as microcrystalline texture. The geological sequence in the study area unfolds through several distinct phases, commencing with the early emplacement of riebeckite biotite granite, indicating an initial phase of granite activity. This is succeeded by Buji biotite-granite, marking a subsequent phase of granite intrusion within the complex. The aegirine-microgranite ring-dyke follows, representing a separate episode of magmatic activity, likely occurring after the formation of the Buji biotite- granite. These emplacement events reveal a dynamic geological history characterized by multiple phases of granite intrusion and ring-dyke formations, reflecting the complex geological processes at play in the Buji Complex of Nigeria.

Keywords

Buji ring complexlithiumRiebeckitesyeniteaegirine

References

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Geology and Petrology of Buji Younger Granite Complex of North Central Nigeria

Abstract

Keywords

References

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