Regional tectonic effects on the composition and mode of distribution of barite mineralization in Akpet Area, SE Nigeria

Reconnaissance geologic mapping for barite mineralization within Akpet Central and environs had been successfully done. The results of the study show that the mineralization of barite is largely structurally controlled although minor sedimentary processes have also contributed. Barite mineralization in the area therefore probably displays both metamorphic/igneous and/or sedimentary origins. Those that are derived from igneous processes occur mainly as veins and exhibit thicknesses which depend on the width of the fractures found in the rocks. On the other hand, barite mineralisation in the northeastern flank of the study area occurs as alluvial deposits and in few cases as domes. Chemical compositions for samples obtained from the northwestern and southwestern parts of the area show greater concentration of BaSO4 than in those samples from northeastern axis which exist in alluvial forms. Hence, both regional tectonic activities and the mode of occurrence of barites constitute important factors in the evaluation of barite mineralization. All the barite samples of the study areas analyzed are of high quality to stand the test of time in the world market. KEY WORDS: Mineralization; Barite; Fractures; quality; alluvial. Global Journal of Geological Sciences Vol.2(2) 2004: 177-18