Mineralogical evaluation of a new global ilmenite resource from the coast of southern Brazil.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorWust, Cássia Fatima-
Autor(es): dc.creatorRizzi, Monique Aparecida Marchese-
Autor(es): dc.creatorTakehara, Lucy-
Autor(es): dc.creatorQueiroga, Glaucia Nascimento-
Autor(es): dc.creatorGirelli, Tiago Jonatan-
Autor(es): dc.creatorChemale Júnior, Farid-
Data de aceite: dc.date.accessioned2025-08-21T15:05:01Z-
Data de disponibilização: dc.date.available2025-08-21T15:05:01Z-
Data de envio: dc.date.issued2024-09-11-
Data de envio: dc.date.issued2024-09-11-
Data de envio: dc.date.issued2023-
Fonte completa do material: dc.identifierhttps://www.repositorio.ufop.br/handle/123456789/18592-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S0895981124000294-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.jsames.2024.104807-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1002114-
Descrição: dc.descriptionThe presence of superficial deposits of heavy minerals along the Rio Grande do Sul Coastal Plain has generated much interest because of their potential as a new world-class resource. A detailed mineral characterization study of sixteen samples of ilmenite concentrates from the Sao ̃ Jos ́e do Norte deposit was conducted using electronic microprobe and magnetic susceptibility analyses. The results showed that the ilmenite concentrates have a TiO2 content (54.24 wt %) consistent with a mineral assemblage dominated by primary ilmenite and hydrated ilmenite. Histograms and graphs of the variation in minor element concentrations showed enrichment in TiO2, MnO, and Cr2O3 in the altered products and loss of iron and manganese oxides during increased weathering. The alteration ratios measured by the Ti/(Ti + Fe) variation in ilmenite range from 0.50 to 0.65. The altered grains contain primary ilmenite/hydrated ilmenite and pseudorutile phase associations. Different degrees of alteration in the grains were magnetically differentiated, with a greater concentration of the alteration products in the less magnetic fractions. Those altered grains with low magnetic susceptibility may play a critical role during mining because they behave differently from fresh and unaltered grains. This study confirms that the alteration process alters the physical–chemical characteristics of the minerals. Therefore, the degree of alteration influences the metallurgical processing of this ore. The comparison with other deposits shows that the degree of ilmenite alteration of Quaternary world-class deposits is less intense than that of Pliocene to Eocene Australian deposits.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectTitanium minerals-
Palavras-chave: dc.subjectSão josé do norte placer deposit-
Palavras-chave: dc.subjectSouthern Brazil-
Palavras-chave: dc.subjectIlmenite-
Palavras-chave: dc.subjectElectron microprobe-
Título: dc.titleMineralogical evaluation of a new global ilmenite resource from the coast of southern Brazil.-
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