Abstract:Field, petrographical and geochemical data were used to constrain the petrogenetic attributes of the associated pegmatites and aplites in Iwo area, southwestern Nigeria. The pegmatites and aplites, which occur as veins and dykes are hosted by the 642 ± 6 Ma quartz potassic syenite. The pegmatites consist of quartz, feldspar with rare biotite and occasional beryl while in addition the aplites contain hornblende instead of biotite and totally lack beryl. Field evidences indicate that the pegmatites are older tha… Show more
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