3D ANALYTICAL SIGNAL IN GRAVIMETRIC DATA INTERPRETATION. CASE STUDY: LOS NARANJOS - FACATATIVA (COLOMBIA)

A gravimetric study in a sector of the municipality of Facatativa, located in the west Sabana of Bogota is presented. The obtained data were processed using the proper corrections, for instance: height, latitude, tide and drift reductions. This procedure was performed to define the Total Bouguer Anomaly; applying the reduction the first and second order vertical derivative are obtained. With the derivative has been possible to determine some geological features: surface, shallow and anomalous bodies. To establish those features is necessary to identify the location, shape and depth of the anomalous source, by applying 3D Analytic Signal method. The results are very accurate in the geological interpretation, not only of the magnetic potential but also with the gravimetric potential The geophysical interpretation and geological knowledge through Poisson relation, allowing precise definition of the geological contacts, faults and structural boundaries in the field of study.