THE CAMAQUÃ BASIN MODELLING : TECTONOSTRATIGRAPHY THROUGH INTEGRATION OF GEOPHYSICAL (GRAVIMETRY, WELL LOG) AND REMOTE SENSING DATA

Abstract

A tectonostratigraphic study of the Camaquã Basin, formed by Neoproterozoic to Eopaleozoic volcano-sedimentary units, is herein presented. Based on lineaments obtained through LANDSAT<br />TM images and geophysical methods, four structural domains were recognized. The depositional and deformational sequences of the Guaritas and the Bom Jardim Formations were identified on<br />well logs, where the fluvial deltaic system and brittle to brittle-ductile tectonic evidence is preserved. Differential compaction of sedimentary rocks was recognized using geophysical information (electrical (well log) and potential methods (gravimetry)). The sedimentary package presents variable thickness, increasing to the NE portion of the basin, and a compartmentalization in echelon subbasins, delimited by NW-trending structures is observed. A 3D schematic model of the Camaquã Basin was built based on the geophysical and satellite image data integrated to the Digital Terrane Model.