Geologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP)
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.5327/Z1519-874X2011000300007 http://hdl.handle.net/11449/72929 |
Resumo: | The 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. |
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Geologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP)Geological and technological characterization of the manganese ore deposits of the Córrego do Cocho Mine, Itapira (SP)Degree of liberationGonditesItapira GroupManganese oreManganese sulphatesMineral technologychemical weatheringgrain sizelateritemanganese depositmetasedimentore depositore mineralquartzitespessartineBrazilCorrego do Sitio MineMinas GeraisThe 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.Departamento de Petrologia e Metalogenia IGCE UNESP, Av. 24-A 1.515, CEP 13506-900, Rio Claro, SPLaboratório de Caracterização Tecnológica Escola Politécnica USP, São Paulo, SPAnglo AshanthiGold S.A. Nova Lima, MGDepartamento de Petrologia e Metalogenia IGCE UNESP, Av. 24-A 1.515, CEP 13506-900, Rio Claro, SPUniversidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Nova Lima, MGAngeli, Nelson [UNESP]Khan, HenriqueIto, Gabriel Mineo [UNESP]De Carvalho, Sebastião Gomes [UNESP]Jimenez-Rueda, Jairo Roberto [UNESP]Penha, Ulisses Cyrino2014-05-27T11:26:16Z2014-05-27T11:26:16Z2011-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article107-130application/pdfhttp://dx.doi.org/10.5327/Z1519-874X2011000300007Geologia USP - Serie Cientifica, v. 11, n. 3, p. 107-130, 2011.1519-874Xhttp://hdl.handle.net/11449/7292910.5327/Z1519-874X20110003000072-s2.0-845552025012-s2.0-84555202501.pdf0864918679971906Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporGeologia USP: Serie Cientificainfo:eu-repo/semantics/openAccess2024-01-11T06:30:43Zoai:repositorio.unesp.br:11449/72929Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:42:55.324772Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Geologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP) Geological and technological characterization of the manganese ore deposits of the Córrego do Cocho Mine, Itapira (SP) |
title |
Geologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP) |
spellingShingle |
Geologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP) Angeli, Nelson [UNESP] Degree of liberation Gondites Itapira Group Manganese ore Manganese sulphates Mineral technology chemical weathering grain size laterite manganese deposit metasediment ore deposit ore mineral quartzite spessartine Brazil Corrego do Sitio Mine Minas Gerais |
title_short |
Geologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP) |
title_full |
Geologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP) |
title_fullStr |
Geologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP) |
title_full_unstemmed |
Geologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP) |
title_sort |
Geologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP) |
author |
Angeli, Nelson [UNESP] |
author_facet |
Angeli, Nelson [UNESP] Khan, Henrique Ito, Gabriel Mineo [UNESP] De Carvalho, Sebastião Gomes [UNESP] Jimenez-Rueda, Jairo Roberto [UNESP] Penha, Ulisses Cyrino |
author_role |
author |
author2 |
Khan, Henrique Ito, Gabriel Mineo [UNESP] De Carvalho, Sebastião Gomes [UNESP] Jimenez-Rueda, Jairo Roberto [UNESP] Penha, Ulisses Cyrino |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) Nova Lima, MG |
dc.contributor.author.fl_str_mv |
Angeli, Nelson [UNESP] Khan, Henrique Ito, Gabriel Mineo [UNESP] De Carvalho, Sebastião Gomes [UNESP] Jimenez-Rueda, Jairo Roberto [UNESP] Penha, Ulisses Cyrino |
dc.subject.por.fl_str_mv |
Degree of liberation Gondites Itapira Group Manganese ore Manganese sulphates Mineral technology chemical weathering grain size laterite manganese deposit metasediment ore deposit ore mineral quartzite spessartine Brazil Corrego do Sitio Mine Minas Gerais |
topic |
Degree of liberation Gondites Itapira Group Manganese ore Manganese sulphates Mineral technology chemical weathering grain size laterite manganese deposit metasediment ore deposit ore mineral quartzite spessartine Brazil Corrego do Sitio Mine Minas Gerais |
description |
The 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. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-12-01 2014-05-27T11:26:16Z 2014-05-27T11:26:16Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.5327/Z1519-874X2011000300007 Geologia USP - Serie Cientifica, v. 11, n. 3, p. 107-130, 2011. 1519-874X http://hdl.handle.net/11449/72929 10.5327/Z1519-874X2011000300007 2-s2.0-84555202501 2-s2.0-84555202501.pdf 0864918679971906 |
url |
http://dx.doi.org/10.5327/Z1519-874X2011000300007 http://hdl.handle.net/11449/72929 |
identifier_str_mv |
Geologia USP - Serie Cientifica, v. 11, n. 3, p. 107-130, 2011. 1519-874X 10.5327/Z1519-874X2011000300007 2-s2.0-84555202501 2-s2.0-84555202501.pdf 0864918679971906 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Geologia USP: Serie Cientifica |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
107-130 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129453882081280 |