ANÁLISE AEROMAGNETOMÉTRICA E RADIOMÉTRICA DA REGIÃO DE CAMARGOS, BORDA LESTE DO QUADRILÁTERO FERRÍFERO, MG, BRASIL

Aeromagnetometric and radiometric analysis of the Camargos' region, East border of the Iron Quadrangle, MG, Brazil

Abstract

This survey investigates the geological and geoeconomic aspects of the Camargos region, located on the eastern border of the Iron Quadrangle, through geophysical analysis. About the region from which gold ore has been exploited since the 17^th Century, there are few accounts of geological literature. Thus, in order to contribute to the geological understanding of Camargos, the processing result and interpretation of the aereal geophysical datas bank of magnetometry and radiometry is presented. In short, the geological contextualization includes the basement constituted by gneisses that are exposed by Camargos’ Horst. The saws are supported by the quartzites of the Maquiné Group, among which are the tectonic slices of schists of the Nova Lima Group. Sequences of the Supergroup Minas arise in the western portion and constitute the Camargos’ Homoclinal, in which the inversion of the lithological sequences is observed, due to the influence of the domain of the Água Quente’s and Fundão-Cambotas’ thrust fault systems. Alluvial deposits are observed in a confined floodplain. The most important geophysical interpretation was the perception of shear zones and hydrothermal activity. It contributes in part to the understanding of the gold mineralizations that are related to the Rio das Velhas Supergroup sequences in the region.