The geochemical behavior in soil alteration profiles in Lavras (MG), Brazil, was evaluated during the process of soil formation leading to the formation of argillic horizons, in parent material ranging from acid, intermediate to mafic geochemical composition.Along each profile, from the consolidated bedrock to the solum, geochemical analyses of major elements-main oxides were performed, calculating the gains and losses through a mass chemical balance.The results showed a moderate loss of SiO2, bases leaching, and a slight relative enrichment of Al, Fe and Ti.The leaching order of these elements from the alterites was also established.
argillic horizon; ultisols; X-ray fluorescence spectrometry (XRF); Atomic emission spectroscopy with inductive coupled plasm (ICP); Chemical balance; pedogenesis