Abstract            Volume:8  Issue-12  Year-2020         Original Research Articles

Online ISSN : 2347 - 3215 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcret@gmail.com

Results of geochemical data of the granitoids of Madagali area of north – eastern Nigeria, show that the rocks are calc – alkaline, and essentially granitic in composition. The samples have AL/CNK ratios of >1.1, high value of Na₂O (> 3.2%) and presence of normative corundum are characteristics of sedimentary origin (S – type). The trace element contents are possibly suggestive of crustal involvement in genesis. The K – Rb diagram shows that the granites are crystallised within the range of crustal value. The enrichment in Light Rare Earth Element (La, Ce, and Nd), decreased in Heavy Rare Earth Element (Ho to Lu) with negative Eu anomaly suggest that the granitoids were evolved by partial melting of sedimentary rocks. Presence of contents of Large Ion Lithophile Elements such as Rb and Th with negative values of Nb and Sr is suggestive of fractional crystallisation process as well as the involvement of crustal materials in their origin.

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