10.6084/m9.figshare.5666245.v1
Ana Carolina Campos Mateus
Ana Carolina Campos
Mateus
Fábio Soares de Oliveira
Fábio Soares de
Oliveira
Angélica Fortes Drummond Chicarino Varajão
Angélica Fortes Drummond Chicarino
Varajão
Caroline Cibele Vieira Soares
Caroline Cibele Vieira
Soares
Genesis of Soils from Bauxite in Southeastern Brazil: Resilication as a Soil-Forming Process
SciELO journals
2017
pedogenesis
Ferralsol
kaolinite
micromorphology
2017-12-05 08:35:25
Dataset
https://scielo.figshare.com/articles/dataset/Genesis_of_Soils_from_Bauxite_in_Southeastern_Brazil_Resilication_as_a_Soil-Forming_Process/5666245
<div><p>ABSTRACT Pedological studies using X-ray diffraction (XRD), X-ray fluorescence (XRF), optical microscopy, and scanning electron microscopy (SEM-EDS) showed a Xanthic Ferralsol formed from the degradation of bauxite on a slope in the Caparaó region, in southeastern Brazil. We found a decrease in the number and size of bauxite fragments toward the top of the profiles, bauxite fragments that were more degraded at the top of the profiles, transformation of gibbsite into kaolinite, and absolute enrichment in silicon in the mass balance. These indicators suggest that resilication could be the major process responsible for formation of the soil; detailed studies are needed to verify the origin of the silica. The reintroduction of silica into the system occurs by the biogeochemical cycling of vegetation and, in some cases, water table fluctuations, highlighting the role of resilication as a soil-forming process in bauxite-derived soils.</p></div>