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Geochemistry of historical smelting slags from S. Domingos (Iberian Pyrite Belt) and implications for metal recovery [Resumo]

2026-06Documento de conferência Acesso aberto
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datacite.subject.fosCiências Naturais::Ciências da Terra e do Ambiente
datacite.subject.fosCiências Naturais::Outras Ciências Naturais
dc.contributor.authorSilva, Teresa
dc.contributor.authorMorais, Igor
dc.contributor.authorAlbardeiro, Luís
dc.contributor.authorSolá, A. Rita
dc.contributor.authorde Oliveira, Daniel Pipa Soares
dc.date.accessioned2026-09-12T11:12:28Z
dc.date.available2026-09-12T11:12:28Z
dc.date.issued2026-06
dc.description.abstractABSTRACT: The historical mining area of S. Domingos, located in the Iberian Pyrite Belt (IPB), southwestern Portugal, hosts significant accumulations of mining wastes including, smelting slags, iron oxides, milled blocks of pyrite and other residues resulting from centuries of processing Cu-rich massive sulfide ores. Polymetallic sulfide exploitation in this region dates to pre-Roman times and continued until 1966. These slags represent an important record of historical metallurgical practices and a potential secondary resource for critical and strategic raw materials (CRM/SRM) and other valuable metals. This study investigates the geochemical composition and mineralogical characteristics of historical smelting slags, to access not only their potential to metal recovery, but also their associated environmental risks. The slags are heterogeneous and chemically unstable waste products, typically Fe-rich, and dominated by fayalite, Fe2+2SiO4 (the iron-rich member of the olivine mineral group) together with glassy matrices. Fayalite is the result of the reaction of iron oxide with silica at high temperatures and host a range of metals including As, Ba, Co, Cu, Sn, Pb, Sr and Zn. Weathering processes promote metal mobilization of these elements, contributing to local contamination and to the development of acid mine drainage (AMD) products in the surrounding areas. Geochemical assessment indicates that significant quantities of valuable metals remain trapped within these historical slags due to inefficient recovery during earlier smelting technologies. Studies across the IPB suggest that mining wastes may contain significant valuable reserves of metals such as Fe, Zn, Cu and Pb, as well as CRM and other important trace metals. Consequently, these residues represent potentially promising targets for reprocessing using advanced metallurgical or hydrometallurgical technologies. Detailed geochemical characterization provides insights supporting the development of sustainable recovery strategies within a circular economy framework for historic mining districts of the Iberian Pyrite Belt. The results underscore the dual importance of recovering the S. Domingos slags as potential secondary mineral resources, while also mitigating the environmental impact associated with AMD.eng
dc.identifier.citationSilva, T., Morais, I., Albardeiro, L., Solá, R., & de Oliveira, D. (2026). Geochemistry of historical smelting slags from S. Domingos (Iberian Pyrite Belt) and implications for metal recovery. In: Livro de resumos, XII Congresso Nacional de Geologia, Évora, Portugal, 21-26 junho, 2026, pp. 249
dc.identifier.isbn978-972-778-551-3
dc.identifier.urihttp://hdl.handle.net/10400.9/6452
dc.language.isoeng
dc.peerreviewedno
dc.publisherUniversidade de Évora
dc.relationA Sustainable Ecosystem for the Innovative Resource Recovery and Complex Ore Extraction
dc.relationA Geological Service for Europe (GSEU)
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleGeochemistry of historical smelting slags from S. Domingos (Iberian Pyrite Belt) and implications for metal recovery [Resumo]eng
dc.typeconference object
dspace.entity.typePublication
oaire.awardNumber101138432
oaire.awardNumber10067926
oaire.awardTitleA Sustainable Ecosystem for the Innovative Resource Recovery and Complex Ore Extraction
oaire.awardTitleA Geological Service for Europe (GSEU)
oaire.awardURIhttp://hdl.handle.net/10400.9/6449
oaire.awardURIhttp://hdl.handle.net/10400.9/6242
oaire.citation.conferenceDate2026-06-21
oaire.citation.conferencePlaceÉvora, Portugal
oaire.citation.startPage249
oaire.citation.titleXII Congresso Nacional de Geologia
oaire.fundingStreamHORIZON Research and Innovation Actions
oaire.fundingStreamHorizon Europe Guarantee
oaire.versionhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43
person.familyNameSilva
person.familyNameMorais
person.familyNameAlbardeiro
person.familyNameSolá
person.familyNamede Oliveira
person.givenNameTeresa
person.givenNameIgor
person.givenNameLuís
person.givenNameA. Rita
person.givenNameDaniel Pipa Soares
person.identifier2216267
person.identifier.ciencia-idB916-C501-8AA3
person.identifier.ciencia-idB81A-A94B-E72A
person.identifier.ciencia-id4713-7D9F-6567
person.identifier.ciencia-idA11D-DDD7-29F2
person.identifier.orcid0000-0002-0306-1015
person.identifier.orcid0000-0001-9806-7139
person.identifier.orcid0000-0002-3826-260X
person.identifier.orcid0000-0001-9567-5470
person.identifier.orcid0000-0002-6338-8845
person.identifier.ridL-9359-2013
person.identifier.ridG-6378-2015
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