keywords: Magnetometer, magnetic surveying, Edge detections, Oasis Montaj
Proton precession magnetometer of G857 model with 0.1 gamma sensitivity was used to survey a field in Michael Okpara University of Agriculture in Umudike to ascertain the magnetic fabric of the area in order to determine its Geology. Edge detection techniques such as analytical signal, tilt derivative and its associated horizontal derivative, vertical and horizontal derivatives magnetic data have delineated structural features in the area significant for hydrocarbon prospectivity in the basin. Reduction-to-Equator (RTE) of the Total horizontal derivative (THDR) of tilt derivative (TDR) revealed more magnetic anomalies that was not seen on Total magnetic intensity (TMI) map. The analytical signal has shown the location of magnetic sources, contacts or edges. Applying threshold cutoff of 0.0, to the RTE tilt grid has delineated litho-structural boundaries/contacts at the study area. The vertical derivatives map enhanced high frequency anomalies relative to low frequencies.