Atualização de Documento

XIX SBSR

Formulário de atualização

O sistema de atualização, para eventuais correções, estará ativo até 30/11/2019.

Contato: bibdigital@inpe.br


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Resumo	(*)(?)	The northeast region of Brazil has been the target of studies which have shown the relevance of seismic events in recent geological times; however, the genesis of these events is still unknown. This work integrates geomorphometric data derived from interferometric radar and aerogeophysical magnetic data for the analysis of spatial and directional relationship between morphostructural and magnetic lineaments in the Paraíba Basin, northeastern Brazil. The objective is to evaluate the correspondence between the deep tectonic structures in the subsurface, and the features, observed through the relief, on the surface. Geomorphometric products were used for extracting morphostructural lineaments, such as aspect, horizontal curvature and altimetry. Data regarding the anomalous magnetic field and the so-called product first vertical derivative were used for detection of magnetic lineaments. From the analysis performed using the Geographic Information System SPRING 5.2, it was possible to identify important spatial and directional correspondences which enables proposing that areas of pre-existing shear in the study area were reactivated in the Cenozoic, more specifically in the Late Quaternary. This is proposed due to the similarity between the main orientations of lineaments E-W, NE-SW and NW-SE of sedimentary units and the area of the Precambrian basement. In addition, the geographical distribution of magnetic and morphostructural lineaments shows strong correspondence, particularly along major rivers and valleys of central onshore portion of the Paraíba Basin.
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