Pedogeochemical in alteration profiles in the region of Lavras, Minas Gerais. I - Major elements - main oxides

Lacerda, M.P.C.; Andrade, H.; Quemeneur, J.J.G.

Revista Brasileira de Ciencia do Solo 26(1): 75-85

2002


ISSN/ISBN: 0100-0683
Accession: 003877907

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Abstract
The geochemical behaviour in soil alteration profiles in Lavras, Minas Gerais, 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. 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.