Geology and Geochemical Studies of Metatexite And Diatexite Migmatites From Bauchi, Northeastern Nigeria

International Journal of Geoinformatics and Geological Science

© 2021 by SSRG - IJGGS Journal

Volume 8 Issue 2

Year of Publication : 2021

Authors : Muhammad Nafisatu Magaji, Ahmad Isah Haruna, Abdulmajid Isa Jibrin, Oshelike Ishioma Bridget

10.14445/23939206/IJGGS-V8I2P104

How to Cite?

Muhammad Nafisatu Magaji, Ahmad Isah Haruna, Abdulmajid Isa Jibrin, Oshelike Ishioma Bridget, "Geology and Geochemical Studies of Metatexite And Diatexite Migmatites From Bauchi, Northeastern Nigeria," SSRG International Journal of Geoinformatics and Geological Science, vol. 8,  no. 2, pp. 37-44, 2021. Crossref, https://doi.org/10.14445/23939206/IJGGS-V8I2P104

Abstract:

The study addressed the geochemical properties of rocks of the study area. In this study, the geological mapping was done on a scale of 1:25,000 through an orderly method of mapping along with profiles from one outcrop to another by noting road and river channel that reveals subsurface lithology to understand the geology of the area. Samples of fresh representative rocks units were taken at each location with a corresponding coordinate. A total of 20 samples were collected, sorted, and grouped using Sawyer’s (2008) first- and second-order morphological classifications of migmatites into four on the basis of morphology, and ten (10) representative rock samples were picked for whole-rock geochemical analysis (XRF). The results obtained show that the area has four distinct lithologic units. Viz, metatexite, melanocratic diatexite, mesocratic diatexite and leucocratic diatexite of different morphologic classes. The range of silica for metatexites and diatexites are 54.3wt.% to 65wt.% and 79.7wt.% to 86.0wt.% respectively. Both the metatexites and the diatexites shows overlapping compositions and the decreasing/ increasing trends on harker diagrams indicates that both are petrogenetically related. However, from the plot of frost tectonic discrimination the rock groups occupy both the ferroan and magnesian fields and relating it further to alumina saturation index, the peraluminous property of the diatexites implies high development of k-feldspar with continuous fractional crystallization, as the system is cooling and temperature is dropping in forming the leucocratic diatexitest

Keywords:

Geochemical, Diatexite Migmatites

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