In this work we used the geophysical methods of seismic refraction and resistivity in a mineral deposit of bauxite in the region of Barro Alto, Goiás. The goal was to define the contact between the layer of bauxite and the crystalline basement composed mainly of anorthosite. The main problems in this study were the complex geometry of residual concentration deposits and the gradational interface that occurs between the anorthositic rock and the layer of bauxite. This gradational interface can decrease the contrast between the layers making it very difficult to ascertain it.


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