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Tipo:	Artigo de Periódico
Título:	Genesis of soils from bauxite in Southeastern Brazil: resilification as a soil-forming process
Autor(es):	Ana Carolina Campos Mateu Fábio Soares de Oliveira Angélica Varajao Caroline Cibele Vieira Soares
Resumo:	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.
Assunto:	Ciência do solo Bauxita Silica
Idioma:	eng
País:	Brasil
Editor:	Universidade Federal de Minas Gerais
Sigla da Instituição:	UFMG
Departamento:	IGC - DEPARTAMENTO DE GEOGRAFIA
Tipo de Acesso:	Acesso Aberto
Identificador DOI:	https://doi.org/10.1590/18069657rbcs20160507
URI:	http://hdl.handle.net/1843/52107
Data do documento:	2017
metadata.dc.url.externa:	https://www.rbcsjournal.org/pt-br/article/genesis-of-soils-from-bauxite-in-southeastern-brazil-resilication-as-a-soil-forming-process/
metadata.dc.relation.ispartof:	Revista Brasileira de Ciência do Solo
Aparece nas coleções:	Artigo de Periódico

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