AN EVALUATION OF NIGERIA SAT-1 IMAGE FOR GEOLOGICAL MAPPING OF PART OF PLATEAU STATE, NIGERIA

Abstract

Remote Sensing and Geographic Information System (GIS) techniques were applied in the geological mapping of part of Jos, Plateau State, Nigeria in this paper. The study was mainly through structural, lithological and topographic analysis of the  NigeriaSat-1 image of the study area.  Simple digital   image processing techniques which involve classification and linear/edge enhancement were applied on the image to enhance edges of linear features.  These were followed by computer aided visual  interpretation of geological structures and lithological units. The processing led to the production of drainage patterns fractures/lineaments, and geological maps. Younger Granite Ring Complexes  comprising of Kagoro and Ganawuri – Kigom  complexes) were mapped.  The (lineament/fracture, ring dykes) structural analysis indicated that the area has numerous long and short fractures. The geology  generated from the integration of various thematic layers show that the area is underlain by Younger Granite rocks of Jurrasaic age, basement complex rocks; older Granites (porphyritic granite) and   undifferentiated rocks, newer basalt and Dolerite dykes.