2014-09-102014-09-101999-11-26RÉGIS, Cícero Roberto Teixeira. Inversão vinculada de dados de EMAP e MT-1D anisotrópico. 1999. 92 f. Tese (Doutorado) - Universidade Federal do Pará, Centro de Geociências, Belém, 2000. Curso de Pós-Graduação em Geofísica.https://repositorio.ufpa.br/handle/2011/5658We present a technique to invert magnetotelluric data. Two kinds of MT data are treated: data generated by anisotropic one-dimensional models and two-dimensional data from EMAP (ElectroMagnetic Array Profiling) surveys. In both cases we perform the inversions using approximate equality constraints to stabilize the solutions. We show the advantages and the limitations of those constraints in the inversion process. Even when the inversion is constrained, it can still be unstable. To invert the two-dimensional EMAP data we present a process that consists of three steps: 1 – The interpretation model and the initial guess for each case are derived from the filtered apparent resistivity sections which are the result of the filtering process of the EMAP method; 2 – One layer formed by small outcropping bodies (termed static shift layer) is added to the interpretation model in order to resolve the sources of static distortions that contaminate the data; 3 – The inversion is constrained by approximate equality constraints. The first two steps enable us to extract the largest possible amount of information from the data, while the use of the approximate equality constraints allow us to incorporate a priori information which has true physical or geological meaning. With these steps we obtain solutions that are stable and meaningful. We study the method in two-dimensional models as well as in real data from an EMAP line surveyed at the Paraná Basin.porAcesso AbertoInversão - GeofísicaMétodo magnetotelúricoAnisotropiaRio ParanáTeseCNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOFISICA::GEOFISICA APLICADA