INTERPRETACIÓN DE DATOS GRAVIMÉTRICOS CON LA SEÑAL ANALÍTICA 3D. ESTUDIO DE CASO: LOS NARANJOS - FACATATIVÁ (COLOMBIA)
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Universidad Industrial de Santander
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Se presenta un estudio gravimétrico en un sector del Municipio de Facatativá, ubicado en la Sabana Occidentede Bogotá; con los datos adquiridos se realizó el procesamiento de los mismos utilizando las correccionescorrespondientes: altura, bouguer, mareas, deriva y topografía, las cuales permiten definir la Anomalía de Bouguer total. Al aplicar las reducciones se obtienen las derivadas verticales de primer y segundo orden, las cuales permiten definir fuentes geológicas superficiales y poco profundas, así como los bordes anómalos. La definición de dichos rasgos hace necesario conocer la localización, forma y profundidad de las fuentes anómalas, para lo cual se utilizó la técnica de la Señal Analítica 3D, cuyos resultados son muy precisos en la interpretación geológica no solo del método de potencial magnético, sino también de potencial gravimétrico a través de la relación de Poisson, permitiendo definir con precisión los contactos geológicos, contornos estructurales y fallas en el sector de estudio.
Palabras clave: Gravimetría, Señal analítica 3D, Derivadas Verticales, Fuentes Anómalas.
A gravimetric study in a sector of the municipality of Facatativa, located in the west Sabana of Bogotá 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. Keywords: Gravimetry, 3D Analytic Signal, Vertical Derivates, Anomaly Sources
A gravimetric study in a sector of the municipality of Facatativa, located in the west Sabana of Bogotá 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. Keywords: Gravimetry, 3D Analytic Signal, Vertical Derivates, Anomaly Sources