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New Contributions to Mineralogical and Geochemical Knowledge of Old Preguiça Mine, Beja, Portugal

2026-03Artigo científico Acesso aberto
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datacite.subject.fosCiências Naturais::Ciências da Terra e do Ambiente
datacite.subject.fosCiências Naturais::Outras Ciências Naturais
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
datacite.subject.sdg12:Produção e Consumo Sustentáveis
dc.contributor.authorSilva, Teresa
dc.contributor.authorMorais, Igor
dc.contributor.authorMesquita Soares, Sofia
dc.contributor.authorRodrigues, Ivo
dc.contributor.authorde Oliveira, Daniel Pipa Soares
dc.contributor.authorMirao, Jose
dc.date.accessioned2026-03-30T13:36:24Z
dc.date.available2026-03-30T13:36:24Z
dc.date.issued2026-03
dc.description.abstractABSTRACT: Abandoned mining areas provide valuable opportunities to investigate ore-forming processes, supergene mineral transformations, and the geochemical behaviour of metals. In this sense, the old Preguiça mine (Beja, Portugal), exploited for Fe–Zn–Pb, was studied providing new mineralogical and geochemical data aimed at improving the understanding of the secondary mineral assemblages of this deposit. A total of 70 samples collected from three accessible underground levels (first, second and third) and mine waste, complemented by 16 samples from a deeper level (fourth) previously collected, were analysed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and a portable X-ray fluorescence (pXRF) equipment. Mineralogical phases are dominated by a wide range of secondary oxides, carbonates, arsenates, vanadates, silicates, phosphates and sulphates, but remnants of primary sulphides were also found. The following minerals can be emphasised: goethite, hematite, calcite, dolomite, descloizite, willemite, mimetite, cerussite, smithsonite and fraipontite. The presence of massicot in the Preguiça mine, is described for the first time. Bulk geochemical analyses show high concentrations of Fe, Ca, Zn and Pb, consistent with the observed mineralogy. The presence of vanadium- and arsenic-bearing minerals highlights the occurrence of critical raw materials, supporting the importance of reassessing other abandoned mining areas in the context of sustainable resource management and strategic raw-material planning.eng
dc.identifier.citationSilva, T. P., Morais, I., Soares, S., Rodrigues, I., de Oliveira, D., & Mirão, J. (2026). New Contributions to Mineralogical and Geochemical Knowledge of Old Preguiça Mine, Beja, Portugal. In: Minerals, 2026, vol. 16(4), article 348. https://doi.org/10.3390/min16040348
dc.identifier.doi10.3390/min16040348
dc.identifier.issn2075-163X
dc.identifier.urihttp://hdl.handle.net/10400.9/6339
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationA Geological Service for Europe (GSEU)
dc.relation.hasversionhttps://www.mdpi.com/2075-163X/16/4/348
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectMineralogy
dc.subjectGeochemistry
dc.subjectMine wastes
dc.subjectAbandoned mines
dc.subjectPreguiça mine
dc.subjectBeja (Portugal)
dc.titleNew Contributions to Mineralogical and Geochemical Knowledge of Old Preguiça Mine, Beja, Portugaleng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumber10067926
oaire.awardTitleA Geological Service for Europe (GSEU)
oaire.awardURIhttp://hdl.handle.net/10400.9/6242
oaire.citation.issue4
oaire.citation.titleMinerals
oaire.citation.volume16
oaire.fundingStreamHorizon Europe Guarantee
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameSilva
person.familyNameMorais
person.familyNameMesquita Soares
person.familyNamede Oliveira
person.familyNameMirao
person.givenNameTeresa
person.givenNameIgor
person.givenNameSofia
person.givenNameDaniel Pipa Soares
person.givenNameJose
person.identifier2216267
person.identifier.ciencia-idB916-C501-8AA3
person.identifier.ciencia-idF610-2BFC-9343
person.identifier.ciencia-idA11D-DDD7-29F2
person.identifier.ciencia-id2A1B-90FE-0542
person.identifier.orcid0000-0002-0306-1015
person.identifier.orcid0000-0001-9806-7139
person.identifier.orcid0000-0002-7250-1619
person.identifier.orcid0000-0002-6338-8845
person.identifier.orcid0000-0003-0103-3448
person.identifier.ridL-9359-2013
person.identifier.scopus-author-id8986127400
relation.isAuthorOfPublicatione3d4c3a2-65c9-44d1-acd7-5c09468b7a24
relation.isAuthorOfPublicationfe37a5f0-7e43-462a-9c66-fbe3e5c9bca6
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