Major Element Analysis of Basement Complex Rocks Around Bajabure Area Maiha L.G.A Adamawa State North-Eastern Nigeria

Project Report from the year 2014 in the subject Geography / Earth Science - Geology, Mineralogy, Soil Science, grade: B+, , course: Geology, language: English, abstract: Geological field mapping was carried out within the study area (Bajabure). Basement rocks known as the older granite suite were the dominant occurring rocks which varies texturally from the fine grained granite to medium grained granite to coarse grained granite to coarse porphyritic biotite granite. Minor suites of granite gneiss, and pegmatite were also observed in the study area. Mylonite was also observed that trend in N-S direction. The samples collected were subjected to geochemical analysis for major oxide composition using the X ray fluorescence spectrometer. Geochemical results indicates that Silica (Si02) content ranges from 72.14wt% to 74.53wt% while Aluminium oxide or Alumina (A1203) ranges from 13.26wt% to 14.57wt%. Calcium oxide (CaO) ranges from 0.53wt% to 1.00wt%. Sodium oxide (Na20) ranges from 2.03wt% to 3.63wt% while Potassium oxide (K20) ranges from 4.91wt% to 6.48wt%. Haematite (Fe203) ranges from O.63wt% to 1.59wt%, Manganese oxide (MnO) ranges from 0.005wt% to 0.017% while Magnesium oxide (MgO) ranges from 0.14wt% to 0.58wt%. Titanium oxide (Ti02) ranges from 0.109wt% to 0.441wt%. Phosphorus Pentaoxide (P205) ranges from 0.04wt% to 0.16wt%. Loss of ignition (LOI) ranges from O.46wt% to 1.35wt%. Chemical variation plots indicate that the rocks are mostly Calc.alkaline and Peraluminous. The silica content of the samples (> 66%) suggests that all the rocks are acidic and that the rocks from Bajabure are cogenetic and compares favourably with those from the Northern Cameroon volcanic line and other parts of the basement complex of Nigeria.