FOTOINTERPRETAÇÃO GEOLÓGICA DE IMAGENS MULTIFONTES E SUA APLICAÇÃO NO GREENSTONE BELT RIO DAS VELHAS, QUADRILÁTERO FERRÍFERO, MG

Abstract

This paper presents the results based on state of art of geologic interpretation techniques applied to airbomegeophysical data, remotes ensing and digital elevation model (DEM) from the Rio das Velhas Project, Quadrilatero Ferrifero and their data integration products. The best products resulting from the digital image processing of multisource data are: chromostereoscopy and IRS Fusion of airborne geophysical images with the first principal component of ETM+/Landsat7 or radar image; or ETM+/Landsat7 panchromatic bandor shaded digital elevation model as intensity channel. The geologic interpretation of this integrated images allows the individualization of 57 lithogeophysical units that presents different characteristics according to the analysis of the stream drainage patterns, characterization of landforms, analysis of textural properties of depth estimates of magnetic sources by Euler deconvolution-3D, airbone geophysical channels intensity and radar texture elements of relief and magnetic relief texture. These products allow the delineation of linear relief features and linear magnetic relief features named as directional, indifferent lineaments, magnetic relief lineament and structures associated with the Sao Vicente shearzone.