Genesis of soils from bauxite in Southeastern Brazil: resilification as a soil-forming process

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dc.creatorAna Carolina Campos Mateu
dc.creatorFábio Soares de Oliveira
dc.creatorAngélica Varajao
dc.creatorCaroline Cibele Vieira Soares
dc.date.accessioned2023-04-17T22:27:43Z
dc.date.accessioned2025-09-08T22:52:43Z
dc.date.available2023-04-17T22:27:43Z
dc.date.issued2017
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1590/18069657rbcs20160507
dc.identifier.issn0100-0683
dc.identifier.urihttps://hdl.handle.net/1843/52107
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofRevista Brasileira de Ciência do Solo
dc.rightsAcesso Aberto
dc.subjectCiência do solo
dc.subjectBauxita
dc.subjectSilica
dc.subject.otherPedogenesis
dc.subject.otherFerralsol
dc.subject.otherKaolinite
dc.subject.otherMicromorphology
dc.titleGenesis of soils from bauxite in Southeastern Brazil: resilification as a soil-forming process
dc.typeArtigo de periódico
local.citation.epage18
local.citation.issuee0160507
local.citation.spage1
local.citation.volume41
local.description.resumoPedological 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.
local.identifier.orcidhttps://orcid.org/0000-0002-1450-7609
local.identifier.orcidhttps://orcid.org/0000-0001-6345-1835
local.identifier.orcidhttps://orcid.org/0000-0002-9930-1801
local.publisher.countryBrasil
local.publisher.departmentIGC - DEPARTAMENTO DE GEOGRAFIA
local.publisher.initialsUFMG
local.url.externahttps://www.rbcsjournal.org/pt-br/article/genesis-of-soils-from-bauxite-in-southeastern-brazil-resilication-as-a-soil-forming-process/

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