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Receiver Function studies contribute to the understanding of crustal structure and its evolution by characterizing the internal physical properties of the Earth, such as seismic wave velocity and Poisson ratio. The data inversion technique enables to modeling of crustal structure, seeking a geologically consistent model that provides a quantitative analysis of the related process. The linearized inversion of Gauss-Marquardt-Levenberg method was applied to the Receiver Function synthetic and real data, obtained by geophysical surveys in Central Brazil, using the Parameter Estimation (PEST) software. The Receiver Function inversion was performed varying only S wave velocity parameter. Synthetic data inversion converged and data fitting was optimal when the initial velocity models used were close to the reference model. The inversion results of Receiver Function data, obtained from nine seismographic stations, using models of crustal structure and velocity distribution based on studies of seismic refraction and Receiver Function were deemed reasonable. Crustal mean velocities are compatible with velocity estimates obtained by previous geophysical studies. The inversion method used here is promising for crustal structure investigations, while PEST software proved to be very efficient, enabling inversion control parameter configuration and monitoring of the process by statistical results.

APPLICATION OF GAUSS-MARQUARDT-LEVENBERG METHOD IN THE INVERSION OF RECEIVER FUNCTION IN CENTRAL BRAZIL