Contribuição geofísica ao estudo de parte do terreno São Gabriel – Escudo Sul-riograndense, Rio Grande do Sul – Brasil

Abstract

Airborne geophysical methods have been widely applied over the past few years for large area studies. The present paper presents a contribution to the geophysical studies, results of the processing of the aeromagnetic and airborne gamma-ray data, acquired by the Aerogeofísico Escudo of Rio Grande do Sul Project in 2010 of an area inserted in the São Gabriel Terrane. For magnetic data, the results showed that the main magnetic lineaments, which may be associated with subsurface structures, are oriented in the NW-SE direction. However, the lithological units belonging to São Gabriel Terrane are oriented to NE-SW. For gamma-ray data, the results clearly showed the lithological contacts between some units that could be validated through geological maps. The results provide a broad possibility of more detailed studies in order to contribute to the geoscientific knowledge of this important portion of the South - Rio Grande do Sul Shield, since there are few geophysical surveys published on the São Gabriel Terrane, as well as in the shield compared to geological studies.