Geophysical Interpretation of Obudu Area, Cross River State, Southeastern Nigeria Using Aeromagnetic Data

In order to identify the boundaries and intersections of linear geological features within the study region, the aeromagnetic data obtained from the Obudu area in southeast Nigeria was enhanced using precise methodologies, such as the Horizontal derivative (HD), first vertical derivative (FVD), and second vertical derivative (SVD). The process of separating the regional and residual aeromagnetic data information involved applying the polynomial fitting algorithm prior to filtering. The depth to magnetic sources was estimated using the usual Euler deconvolution approach. The studied area is characterized by fluctuations in aeromagnetic signals, indicating alterations in the magnetic susceptibilities of the underlying sedimentary and basement rocks based on the available information derived from the interpreted data. The filtered aeromagnetic maps may exhibit lineaments that exhibit movement along the NE-SW and NW-SE directions. The depths at which anomalies arise from structural complexities were assessed by Euler configurations within the vertical range of 0 to 2100 meters. The presence of a low sedimentation thickness and a high density of lineaments within the studied area suggests a potential correlation between the identified geological formations and hydrothermal mineralization.