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Evaluation of the mining potential of the São Domingos mine wastes, Iberian Pyrite Belt, Portugal

2020Journal article Open access
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dc.contributor.authorVieira, A.
dc.contributor.authorMatos, João Xavier
dc.contributor.authorLopes, Luis
dc.contributor.authorMartins, Ruben
dc.date.accessioned2022-03-17T12:44:04Z
dc.date.available2022-03-17T12:44:04Z
dc.date.issued2020
dc.description.abstractABSTRACT: The outcropping São Domingos Iberian Pyrite Belt deposit was mined since Roman time and between 1857 and 1966. The mine is formed by a 120 m depth flooded open pit and galleries until 420 m depth. Associated with felsic volcanic rocks and black shales of the Volcano-Sedimentary Complex, the deposit is formed by massive sulphide and stockwork ore (py, ccp, sp, ga, tt, apy) and related supergene enrichment ore (hematite gossan and covellite/chalcocite). Different mine wastes classes were mapped: gossan, felsic volcanic and shales, shales and landfill. Considering the CONASA mining waste characterization (162 shafts and 160 reverse circulation boreholes/LNEG database), new inferred resources are presented, using block modelling software: 2.38 Mt @ 0.77 g/t Au and 8.26 g/t Ag in non-conditioned volumes. Considering all evaluated wastes, including urban areas, an inferred resource of 4.0 Mt @ 0.64 g/t Au and 7.30 g/t Ag is presented, corresponding to a metal content of 82,878 oz t Au and 955,753 oz t Ag.pt_PT
dc.description.abstractRESUMO: Localizado na Faixa Piritosa Ibérica, o jazigo de São Domingos foi explorado na época Romana e no período entre 1857 e 1966, tendo sido escavada uma corta com 120 m de profundidade e abertas galerias mineiras até 420 m. O minério é formado por sulfuretos maciços e stockwork (py, ccp, sp, ga, tt, apy) e respetivo enriquecimento supergénico (chapéu de ferro hematítico e zona de covelite/calcocite), encontrando-se associado a rochas vulcânicas félsicas e xistos negros do Complexo Vulcano-Sedimentar. Cartografaram-se diferentes classes de escombreiras: chapéu de ferro, rochas vulcânicas e xistos, xistos e aterros. Considerando a sua caracterização efetuada pela empresa CONASA (162 poços e 160 sondagens de circulação inversa/base de dados LNEG), foram inferidos novos recursos usando software de modelação por blocos: 2,38 Mt @ 0,77 g/t Au e 8,26 g/t Ag (volumes não condicionados). Considerando todos os recursos avaliados (incluindo áreas urbanas) inferem-se valores de 4,0 Mt @ 0.64 g/t Au e 7,30 g/t Ag, correspondendo a um conteúdo em metal de 82 878 oz t Au e 955 753 oz t Ag.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationVieira et al. 2020, ‘Evaluation of the mining potential of the São Domingos mine wastes, Iberian Pyrite Belt, Portugal’, Comunicações Geológicas, vol. 107, nº 3 (especial), pp. 91-100. https://doi.org/10.34637/rr8r-d829pt_PT
dc.identifier.doihttps://doi.org/10.34637/rr8r-d829
dc.identifier.eissn1647-581X
dc.identifier.issn0873-948X
dc.identifier.urihttp://hdl.handle.net/10400.9/3811
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherLNEG - Laboratório Nacional de Energia e Geologiapt_PT
dc.relation.publisherversionhttps://www.lneg.pt/wp-content/uploads/2020/12/07_Vieira-et_al_107_III_91-100.pdfpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectSão Domingos minept_PT
dc.subjectMining wastes resourcespt_PT
dc.subjectIberian Pyrite Beltpt_PT
dc.subjectPortugalpt_PT
dc.subjectMina de S. Domingos (concelho de Mértola, Portugal)pt_PT
dc.subjectRecursos em escombreiras mineiraspt_PT
dc.subjectFaixa Piritosa Ibéricapt_PT
dc.titleEvaluation of the mining potential of the São Domingos mine wastes, Iberian Pyrite Belt, Portugalpt_PT
dc.title.alternativeAvaliação do potencial mineiro das escombreiras da mina de São Domingos, Faixa Piritosa Ibérica, Portugalpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceAmadorapt_PT
oaire.citation.endPage100pt_PT
oaire.citation.issueFascículo especial IIIpt_PT
oaire.citation.startPage91pt_PT
oaire.citation.titleComunicações Geológicaspt_PT
oaire.citation.volume107pt_PT
person.familyNameXavier Matos
person.familyNameGalego Lopes
person.familyNameMartins
person.givenNameJoão Manuel
person.givenNameJoaquim Luís
person.givenNameRuben
person.identifier.ciencia-idFE16-BE78-D4EA
person.identifier.ciencia-id1E1A-54DA-4B69
person.identifier.orcid0000-0002-6108-1030
person.identifier.orcid0000-0002-6141-8908
person.identifier.orcid0000-0002-0138-8364
person.identifier.ridO-6397-2015
person.identifier.scopus-author-id55697677600
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationc61d09b7-2204-4dd9-beb3-5574983ce60c
relation.isAuthorOfPublication70e6c794-8fe5-4dbb-9399-d471e857700a
relation.isAuthorOfPublication397d35c2-382a-4d52-a118-0fab2699f6d5
relation.isAuthorOfPublication.latestForDiscovery397d35c2-382a-4d52-a118-0fab2699f6d5

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Volume 107 (2020) Fascículo Especial I (X Congresso Nacional de Geologia)