Magnetometria terrestre no auxílio à detecção de zonas mineralizadas contendo Hematita – Porção noroeste do Granito Santos Ferreira, Caçapava do Sul - RS

Abstract

The Rio-grandense South Shield is recognized by geoscientists for their importance as a testimony to the continent's geological evolution and remaining rocky outcroppings. In the mineral exploration is recognized by the mineralization of Cu and Au, which have been intensely studied since the beginning of the last century with the discovery of copper in Caçapava do Sul in the now called Minas do Camaquã and gold in the municipality of Lavras do Sul. In addition to the occurrences of Cu and Au, deposits of hematite (Fe) and cassiterite (tin dioxide SnO2) were also identified. Among the occurrences of hematite, deposits of low concentration (low levels) and located along structures (veins) were described. These were mapped on surface along faults and fractures of Santos Ferreira granite. A more detailed and subsurface characterization of the boundaries of these bodies and their articulation with the nesting rock (granite) and associated structures is important. This study proposes a magnetometric acquisition along the main conditioning structures of the occurrence with the main objective of detecting the main structures (fractures \ faults) and rocky bodies (occurrence of the mineral hematite). The analysis of the techniques of processing and enhancement, interpretation and integration of the geophysical data with the structural geology will provide subsidy for models by increasing the existing information allowing ew interpretations of the continuities of the bodies, depth and distribution of the ore concentration.