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The general idea on which this thesis is based is to find a relationship between gravity anomalies and the volcanic characteristics of the Argentine continental margin, using gravity anomaly data derived from satellite altimetry missions, of marine gravity anomalies and sedimentary thickness data. The main objective is to estimate the isostatic anomaly with different models and methodologies that contribute to the gravimetric characterization of the region. Initially, we addressed the task of organizing the free air gravimetric anomaly data in the region and compiling a consistent and documented database. In order to achieve this the free air gravity anomaly grids derived from satellite altimetry missions with the marine gravity anomalies calculated from cruise data in the Argentine margin and the adjacent ocean area were compared. Ship data from different campaigns at different times were analyzed, and in the first stage were organized into a common database, which would be the starting point to create improved versions with potential new corrections. Another specific objective was to compare the calculation of the Bouguer anomaly with two methods. The first method uses the relationship between topography and gravity with Parker’s development in the Fourier domain, and the second one calculates the complete Bouguer anomaly (Bullard A, B or C) in various ranges of distances with different approximations to the attraction of rectangular and conical prisms near the station. The purpose of this analysis was to validate a method for isostatic anomaly calculation, by means of the discrete Fourier transform and the Airy scheme, in a wide region of the Argentine sea. Once the calculation method was validated, we worked on another specific objective, which was to investigate the mechanism of compensation of the Airy type with a scheme of three interfaces by using the methodology described below: 1) In the forward direction by using different approximations and calculating Parker’s development through three interfaces with local isostatic compensation. 2) By inverting the anomaly obtained in 1) and determining the deflection of Moho necessary to compensate it (cancel it) using the same scheme of three interfaces. 3) By applying an iterative method with more terms in the inversion. The crust-mantle interface (Moho) thus calculated represents a more realistic surface than that calculated with one term in the inversion and also than that estimated with topography and sedimentary thickness data. Even though the experiment was focused on testing numerical algorithms we found that in comparison with the single seismic refraction digitized profile available the inverted "Moho" interface reproduces quite well the Moho on that profile for the iterative method. Then the focus was on the application of backstripping techniques and “process ori-

Caracterización isostática del sector volcánico del margen continental argentino