Upward continuation portrayal of features in the Schist Belt of Nigeria using Geosoft Oasis Montaj

Abstract

Updward continuation analysis of magnetic data of the Schist belt of North-Central Nigeria was carried out with a view to see the deep seated structures with respect to higher altitude. The MAGMAP filtering utilities in Geosoft Oasis Montaj Software was then applied to the magnetic grids to enhance the data for easy interpretation. The MAGMAP filter used in processing the magnetic data is the upward continuation filter. From the continuation map, it is seen that the study area is highly faulted with a lot of cross cutting features (including magnetic dykes) most of which trend in the NE-SW direction. A major fault F1-F1 that transcends across Odogbe and even beyond the study area in the NE-SW direction has been well delineated in the upward map.

Keywords: Upward Continuation filter, Magnetic Data, Schist Belt, Features, MAGMAP, Geosoft Oasis Montaj