Integração e interpretação de dados aerogeofísicos e de sensores remotos aplicados ao mapeamento geológico 1:50.000, região entre Choró e Quixadá-Ce

Abstract

This work is an interpretation and integration of the airborne geophysical data and remote sensing in a 1:50,000 scale of the Choró / Quixadá - CE regions. The area is included in the Algodões-Choró Metamorphic Suite (ACMS). This suite is composed mainly by para and orthogneisses, with layers of amphibolites locally intruded by granitic/tonalitic orthogneisses. Field evidentes suggest two main units described in the bibliography: Algodões Unit - composed by gamet ± biotite gneisses of the tonalitic to granodioritic composition, rarely migmatized and frequently associated with sheets of leucognaisses t gamet amphibolites ± sillimanite metapelites , f quartzites; Quixeramobim Unit - composed mainly biotite gneiss shown banded structure, mica schists, calc-silicated rocks, quartzites and migmatites.The structural analysis of the local and regional lineaments , was carried out with the interpretation of the airborne magnetic products and remote sensing (SRTM and ASTER). The principal lineament in the region corresponds to the dextral shear zone, represented by the Senador Pompeu Shear Zone (SPSZ). However, minor scale shear zones also were identified in the mapping area. The data observed in petrographic studies, allowed an important metamorphic characterization of the area, suggesting a metamorphic evolution since of the greenschist facies until high amphibolite faciesh. Finally, the geological evolution, comprise a polycyclic evolution during the Paleo and Neoproterozoic in this region of the Ceará central Domain.