Mapeamento geológico da formação Uberaba do Núcleo Urbano do Município de Uberaba - MG

Abstract

In the Triângulo Mineiro, the municipality of Uberaba stands out for presenting several fossiliferous occurrences attributed to its lithostratigraphic units, especially the Uberaba and Serra da Galga formations. The lack of geological maps, on a semi-detailed scale, between the transition zone of the urban and rural perimeter favors the risk of undue land occupation, favoring the possibility of a loss of fossiliferous content. In this context, it is essential to develop actions aimed at the use and occupation of territorial space, seeing that the expansion of geological knowledge about the forms and behaviors of the Uberaba Formation can help the conservation of this heritage. Soon this study aimed to perform the geological mapping of the transition zone of the urban and rural perimeter of Uberaba, associating techniques of field surveys and spectrometric range, to geoprocessing tools such as QGIS and GEE, and also survey of lithological information of constructive profiles of tubular wells of the study area, where these were later used in the elaboration of a 3D model in Leapfrog Geo to better understand the local dynamics geological. The use of the moisture band of Tasseled Cap Transformation, elaborated from the GEE, was efficient in differentiating sites with higher humidity in the study area. The formations of this region are distinguished by presenting different patterns of responses to the radiations of U, Th and K, this fact helped in the identification of them in the development of the mapping. The geological profile information of the wells analyzed in the transition zone of the urban and rural perimeter showed that 55 out of 118 of the wells extract waters corresponding mainly to unconsolidated sediment zones and rocks of the Uberaba Formation. While the other wells captain water from the deepest formations mainly of the Serra Geral Formation. The information generated in this study will be associated with geotechnical and hydrogeological information assisting in the territorial management of the municipality.