Geologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP)

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dc.contributor.authorAngeli, Nelson [UNESP]
dc.contributor.authorKhan, Henrique
dc.contributor.authorIto, Gabriel Mineo [UNESP]
dc.contributor.authorDe Carvalho, Sebastião Gomes [UNESP]
dc.contributor.authorJimenez-Rueda, Jairo Roberto [UNESP]
dc.contributor.authorPenha, Ulisses Cyrino
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionNova Lima, MG
dc.date.accessioned2014-05-27T11:26:16Z
dc.date.available2014-05-27T11:26:16Z
dc.date.issued2011-12-01
dc.description.abstractThe objects of this study are three manganese ore deposits and one mine derived from lateritic weathering of gondites (spessartine quartzites). These deposits are associated with Mn-rich garnet metasediments of the Itapira Group (Paleoproterozoic) and the reserves were estimated at approximately 2.0 × 10 6 tons with an average grade of 23% MnO 2. The ore minerals are cryptomelane, pyrolusite, lithiophorite, spessartine and psilomelane. Several crystal shapes and textural characteristics were identifi ed in this study, which are related to the degree of liberation, as confi rmed by heavy media separation method. In this study, we determined the main characteristics of the liberation of manganese, which is concentrated in the fi ne grain-size fraction and is lost during ore dressing. Therefore, the low average content of MnO 2 (28%) is due to this loss, whereas at grain size of minus 0.074 mm, contents near 40% MnO 2 were observed. This suggests that the ore can be used for manufacturing manganese sulphate fertilizers. A comparative study with the ore deposits located at Ouro Fino (MG), mainly with the Caneleiras mine, showed that higher degree of liberation occurs in the coarse grain-size fractions (0.84 to 0.074 mm with MnO 2 content of 38%). As a consequence, the ore can be used for manufacturing Fe-Si-Mn alloys.en
dc.description.affiliationDepartamento de Petrologia e Metalogenia IGCE UNESP, Av. 24-A 1.515, CEP 13506-900, Rio Claro, SP
dc.description.affiliationLaboratório de Caracterização Tecnológica Escola Politécnica USP, São Paulo, SP
dc.description.affiliationAnglo AshanthiGold S.A. Nova Lima, MG
dc.description.affiliationUnespDepartamento de Petrologia e Metalogenia IGCE UNESP, Av. 24-A 1.515, CEP 13506-900, Rio Claro, SP
dc.format.extent107-130
dc.identifierhttp://dx.doi.org/10.5327/Z1519-874X2011000300007
dc.identifier.citationGeologia USP - Serie Cientifica, v. 11, n. 3, p. 107-130, 2011.
dc.identifier.doi10.5327/Z1519-874X2011000300007
dc.identifier.file2-s2.0-84555202501.pdf
dc.identifier.issn1519-874X
dc.identifier.lattes0864918679971906
dc.identifier.scopus2-s2.0-84555202501
dc.identifier.urihttp://hdl.handle.net/11449/72929
dc.language.isopor
dc.relation.ispartofGeologia USP: Serie Cientifica
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectDegree of liberation
dc.subjectGondites
dc.subjectItapira Group
dc.subjectManganese ore
dc.subjectManganese sulphates
dc.subjectMineral technology
dc.subjectchemical weathering
dc.subjectgrain size
dc.subjectlaterite
dc.subjectmanganese deposit
dc.subjectmetasediment
dc.subjectore deposit
dc.subjectore mineral
dc.subjectquartzite
dc.subjectspessartine
dc.subjectBrazil
dc.subjectCorrego do Sitio Mine
dc.subjectMinas Gerais
dc.titleGeologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP)pt
dc.title.alternativeGeological and technological characterization of the manganese ore deposits of the Córrego do Cocho Mine, Itapira (SP)en
dc.typeArtigo
dcterms.licensehttp://www.revistas.usp.br/guspsc/about/editorialPolicies#openAccessPolicy
unesp.author.lattes0864918679971906
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Geociências e Ciências Exatas, Rio Claropt

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Artigos - Petrologia e Metalogenia - IGCE