Abstract: Remotely sensed images acquired from National Centre for Remote Sensing (NCRS) Jos, using NigeriaSat 1 imagery were processed (filtering, edge enhancement, digitization etc.) to delineate the major geological ring structures/trends such as lineaments and drainage patterns of Jos Plateau. In addition, to decipher the relationship, if any, between the ring structures and the tectonism in the Plateau. The data was geo-referenced in accordance to topographic map coordinates of the Naraguta Sheet, and convolution models in ILWIS 3.1 software program were specifically employed to enhance and facilitate the recognition of the linear features in the area. Structural analysis shows that numerous fractures and lineation occurs at the northwestern, central and southwest of the satellite image. The strikes and lengths of all lineaments were measured and computed to obtain the rose diagram. The important structural trends are NE-SW, N-S and NW-SE, which corresponds to the directions and positions of the paleo-tectonic fracture zones in the area and mineralization tracks. Areas where basement rocks outcrop or underlay just beneath to the surface (i.e. areas with thin overburden) are known for the high lineament frequencies they exhibit, whereas, areas with little or no lineament frequencies are characteristic of areas with deeply buried basement rocks. Cross-referencing the lineament densities and Younger granites occurrences in Jos Plateau, a correlation is found between them emblematic of tectonic control most likely connected with paleo-tectonic structures; thus, associating their emplacement with the epeirogenic uplift. Mineralization in the Plateau is inferred to have been controlled by the same correlation.
Keywords: Lineaments, fracture, faults, complexes, granites, structures.
Title: Interpretation of Ring Structures in Jos Plateau Using NigeriaSat 1 Imagery
Author: CHUKWUEMEKA C. ONYEANUNA
International Journal of Mathematics and Physical Sciences Research
ISSN 2348-5736 (Online)
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