Abstract
The kigom granites in central Nigeria are alkali amphibole bearing and peralkaline in nature. They are hypersolvus in character and contain mesoperthite in which the albite (Or1-2) and microcline are present in approximately equal proportions. The albite is fully ordered while K-rich feldspar is dominantly microcline. The extreme compositions of these feldspars suggests effective crystallization and ordering by hydrothermal fluids at lower than 3000C. Geochemical data suggest that the fluid involved in the metasomatism was peralkaline in composition and resulted in the enrichment of Nb, Y, and Th, in microgranite, and of Rb, Zn, Li, Sn, and F in the amphibole-bearing units suggesting that the granites underwent long duration of rock-fluid interaction in a peralkaline environment. Keywords: Kigom, Peralkaline granite, Mesoperthite, Arfvedsonite, Riebeckite, [Global Jnl Geol. Sci. Vol.1(1) 2003: 1-12]
Highlights
Summary
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
