Mapping of Lineament Structures using Potential Fields Data in Lafiagi Area, Central Nigeria

Abstract

An evaluation of the lineament features over a part of the transition environment between the Basement complex rocks of the southwestern Nigeria and the Sedimentary rocks of the Nupe Basin was carried out. It was aimed at identification of the structural features responsible for the tectonics and hydrogeology of the area. The work involved the qualitative and quantitative analysis of aeromagnetic data and pseudogravity transforms using Oasis Montaj^TM. The 3-D Euler Deconvolution results from acquired potential fields data, augmented with geologic information were employed in the lineaments extraction and interpretation work. The results have shown that the mapped lineament features generally coincide with the river channels on the geologic and drainage maps which indicate a structural control of the drainage system in the study area. The rose diagram of the extracted Euler solutions’-based lineament features and that of the local geology showed a predominance of NE-SW and N-S trends respectively, typical of the post-Pan African lineaments.