Estudo Da Estrutura Geoelétrica Da Bacia De Resende - Rj, Utilizando O Método Transiente Eletromagnético (Tem). Resultados Preliminares

As part of a multi-disciplinary project for groundwater resources evaluation, eighty-eight transient electromagnetic (TEM)<br>soundings were accomplished in Resende sedimentary basin, Rio de Janeiro State, using the SIROTEM MK3 system<br>from GeoInstruments. The area is highly industrialised and part of the TEM data is affected by electromagnetic noise of<br>cultural origin. The TEM data were interpreted with a 1-D ridge regression inversion algorithm. Results for the superficial<br>horizons show relatively low values for the electric resistivity. Traverse sections of the resistivity as a function of depth<br>showed a good definition of the borders of the basin. A longitudinal section of about 25-km crossing the centre of the<br>basin shows a complex structure, evidencing a very irregular relief for top of the basement. Stratigrahic data of wells<br>available in the surveyed area are in good agreement with resistivity profiles of neighbour stations. Actions seeking to<br>reduce the influence of cultural noise are proposed.