Estimation of Sedimentary Thickness of Part of Anambra Basin Nigeria using Aeromagnetic Data

Abstract

This paper estimated the sedimentary thickness of part of Anambra Basin Nigeria using Aeromagnetic data. The study area is part of Anambra Basin, South Eastern Nigeria. Geographically, it is located between Longitude 7000’E – 7030’E and Latitude 6000’N – 6030’N. Three methods were used in the estimation –graphical method (which gave an overall average thickness of 2.4km), spectral analysis method (which yielded average thickness of 3.95km) and Euler deconvolution method (which verified the depths while giving insight on structures involved).These thickness values are in agreement with previous works thereby negating the possibility of  appreciable petroleum accumulation in this area. Umuagu and Ugbene regions are minor exceptions though, due to their relatively thicker values (above average) and their favourable Euler solutions which qualify these regions for mineralization and hence mineral prospecting interests.

Key words: Allocyclic events, Anticlinal domes, Igneous intrusions, Half-Slope, Vitrinic reflectance.