The depth to basement enhancement using a
singular method is not sufficient enough to ascertain and determine the true
depth to anomalies of aeromagnetic survey work carried out. This work adopted
different approaches to locate the depth to magnetic basement of Ijebu Ode. The
high resolution aeromagnetic data acquired was subjected to downward
continuation filtering, Euler deconvolution at different spectral indices and
the radial power spectrum analysis to determine the depth to underground vault.
The various values gotten for the depth using these different methods were
compared and this shows that there were similarities in the results of the
depth estimation using all these approaches. For the downward continuation
filtering, the depth to basement was estimated at 500 m, and using spectral
analysis technique, it was found out to be in the range of 5m and 410 m and
using the Euler deconvolution at various spectral indices the values ranges
between 6m and 502 m. The depth to basement was confirmed to be at shallow
depth using these different approaches.
Keywords: Aeromagnetic data,
Anomalies, Depth, Enhancement, Filtering.