Reatto A. auteur aut IRD Bruand A. auteur aut IRD Martins E. D. auteur aut IRD Muller F. auteur aut IRD da Silva E. M. auteur aut IRD de Carvalho O. A. auteur aut IRD Brossard Michel auteur aut IRD text journalArticle eng text/pdf reformatted digital access The mineralogy of the Latosols of the Brazilian Central Plateau remains under discussion in the absence of a clear relationship with their age according to their geomorphic location. The aim of this study was thus to clarify the origin of the kaolinite and gibbsite content variation by studying a regional toposequence and using data from the literature. Chemical composition and soil color were used to discuss mineralogy. The mineralogy of the clay fraction was also investigated using X-ray diagrams. Our results showed that the large variation of kaolinite and gibbsite content can be explained by taking into account both their local and regional location, the variation of the hematite and goethite content remaining limited. The model that is proposed to explain such variation combines a regional component, which is mainly associated to the age of the geomorphic surface and a local component which is mainly associated to the hydraulic conditions along the toposequence. To cite this article: A. Reatto et al., C R. Geoscience 340 (2008). specialized Oxisol Ferralsol Mineralogy Iron oxyhydroxide Soil color Biome cerrado 068 340 11 741-748 2008 1631-0713 https://www.documentation.ird.fr/hor/fdi:010044125 10.1016/j.crte.2008.07.006 1631-0713 [F B010044125] https://www.documentation.ird.fr/hor/fdi:010044125 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers18-07/010044125.pdf IRD - Base Horizon / Pleins textes 2009-01-09 2018-08-09 fdi:010044125 fre