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Publication
Caracterização mineralógica do minério de ferro dos jazigos de Cabeço de Mua e da Carvalhosa (Moncorvo)
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Advisor(s)
Abstract(s)
RESUMO: tecnologia e das infraestruturas de um país. Com o intuito de melhor conhecer os minérios de ferro de Portugal, especificamente dos jazigos de Cabeço da Mua e da Carvalhosa, foram efetuados estudos petrográficos, metalográficos e de microscopia eletrónica de varrimento com espetroscopia por dispersão de energias (MEV-EDE). Os minerais principais identificados foram quartzo, hematite e goetite, havendo algumas ocorrências de fosfatos disseminados, magnetite e fosfatos detríticos. O estudo MEVEDE destes minerais permitiu identificar os seus constituintes, tendo sido possível encontrar elementos terras raras nos fosfatos, nomeadamente em monazites. Para uma melhor caracterização dos minérios deveriam ser feitos estudos mais aprofundados, visto tratarem-se de amostras muito ricas e heterogéneas.
ABSTRACT: Iron is a material of high importance for the development of technologies and infrastructures of a country. In order to better characterize iron ore deposits of Portugal, specifically the Cabeço de Mua and the Carvalhosa deposits, petrographic, metallographic and scanning electron microscope (SEM-EDS) studies were conducted. Quartz, hematite and goethite were identified as the main minerals present, although disseminated phosphates, magnetite and detrital phosphates also occur. Thanks to the SEM-EDS analysis, it was possible to identify the components of each mineral phase, with rare earth elements being found in the phosphates, specifically in monazites. Due to the samples’ richness and heterogeneity, further detailed studies are required to improve the characterization of the ore.
ABSTRACT: Iron is a material of high importance for the development of technologies and infrastructures of a country. In order to better characterize iron ore deposits of Portugal, specifically the Cabeço de Mua and the Carvalhosa deposits, petrographic, metallographic and scanning electron microscope (SEM-EDS) studies were conducted. Quartz, hematite and goethite were identified as the main minerals present, although disseminated phosphates, magnetite and detrital phosphates also occur. Thanks to the SEM-EDS analysis, it was possible to identify the components of each mineral phase, with rare earth elements being found in the phosphates, specifically in monazites. Due to the samples’ richness and heterogeneity, further detailed studies are required to improve the characterization of the ore.
Description
Keywords
Minério de ferro Petrografia Metalografia Moncorvo (Portugal) Iron ore Petrography Metallography
Citation
Vianez, V., Dias, J.M., Guedes, A., Sant’Ovaia, H., Ferreira, J., Cruz, C. & Noronha, F. (2025). Caracterização mineralógica do minério de ferro dos jazigos de Cabeço de Mua e da Carvalhosa (Moncorvo). In: Comunicações Geológicas, 2025, vol. 112, Fascículo Especial I, pp. 233-236. https://doi.org/10.34637/pa5c-nc10
Publisher
LNEG - Laboratório Nacional de Energia e Geologia