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Quadro geológico regional da porção central do embasamento pré-ordoviciano de Santa Catarina com base em imagens landsat-5/tm e aerogeofísicas

2003; Sociedade Brasileira de Geologia; Volume: 33; Issue: 2 Linguagem: Inglês

10.5327/rbg.v33i2.1063

2317-4889

Neivaldo Araújo de Castro, Álvaro Penteado Crósta, Francisco José Fonseca Ferreira, Miguel Ângelo Stipp Basei, Maria Elisabete Pascholati,

Geography and Environmental Studies

This paper presents the results of a comparative analysis between litho-structural features observed in LANDSAT-5/TM and aerogeophysical images, in comparison with the regional geological framework of the central portion of the pre-Ordovician basement in the Santa Catarina state (EPOSC), southern Brazil. This is a lithological and structurally complex region, due to the geotectonic evolution of western Gondwana during the Neoproterozoic/Cambrian transition and the break-up of this supercontinent during the Mesozoic. LANDSAT-5/TM imagery contributed with relevant information on brittle structures, whose genesis is probably related to thermal-tectonic events of the formation and break-up of Gondwana. Interpretation of geophysical data (gamma-ray and magnetics) allowed the recognition of features associated with major lithologic units and their structures. The results showed that the integrated analysis of these data contributes to the advance of geological knowledge of this region and, in some cases, provides detailed information for geological cartography.