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


Online ISSN : 2347 - 3215
Issues : 12 per year
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Geochemistry of Madagali Granitoids, North – Eastern Nigeria
Siddig Ahmed Abbas Adam*
Department of Geology, University of N’djamena, Chad Republic
*Corresponding author
Abstract:

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.

Keywords: Granitoids, Calc – alkaline, Petrogenesis, Madagali, Nigeria
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How to cite this article:

Siddig Ahmed Abbas Adam. 2020. Geochemistry of Madagali Granitoids, North – Eastern Nigeria.Int.J.Curr.Res.Aca.Rev. 8(12): 34-47
doi: https://doi.org/10.20546/ijcrar.2020.812.003