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

Detalhes bibliográficos
Autor(a) principal: Vieira, A.
Data de Publicação: 2020
Outros Autores: Matos, João Xavier, Lopes, Luis, Martins, Ruben
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.9/3811
Resumo: ABSTRACT: 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.
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spelling Evaluation of the mining potential of the São Domingos mine wastes, Iberian Pyrite Belt, PortugalAvaliação do potencial mineiro das escombreiras da mina de São Domingos, Faixa Piritosa Ibérica, PortugalSão Domingos mineMining wastes resourcesIberian Pyrite BeltPortugalMina de S. Domingos (concelho de Mértola, Portugal)Recursos em escombreiras mineirasFaixa Piritosa IbéricaABSTRACT: 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.RESUMO: 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.LNEG - Laboratório Nacional de Energia e GeologiaRepositório do LNEGVieira, A.Matos, João XavierLopes, LuisMartins, Ruben2022-03-17T12:44:04Z20202020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/3811engVieira 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-d8290873-948Xhttps://doi.org/10.34637/rr8r-d8291647-581Xinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-16T06:50:42Zoai:repositorio.lneg.pt:10400.9/3811Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:37:04.050324Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Evaluation of the mining potential of the São Domingos mine wastes, Iberian Pyrite Belt, Portugal
Avaliação do potencial mineiro das escombreiras da mina de São Domingos, Faixa Piritosa Ibérica, Portugal
title Evaluation of the mining potential of the São Domingos mine wastes, Iberian Pyrite Belt, Portugal
spellingShingle Evaluation of the mining potential of the São Domingos mine wastes, Iberian Pyrite Belt, Portugal
Vieira, A.
São Domingos mine
Mining wastes resources
Iberian Pyrite Belt
Portugal
Mina de S. Domingos (concelho de Mértola, Portugal)
Recursos em escombreiras mineiras
Faixa Piritosa Ibérica
title_short Evaluation of the mining potential of the São Domingos mine wastes, Iberian Pyrite Belt, Portugal
title_full Evaluation of the mining potential of the São Domingos mine wastes, Iberian Pyrite Belt, Portugal
title_fullStr Evaluation of the mining potential of the São Domingos mine wastes, Iberian Pyrite Belt, Portugal
title_full_unstemmed Evaluation of the mining potential of the São Domingos mine wastes, Iberian Pyrite Belt, Portugal
title_sort Evaluation of the mining potential of the São Domingos mine wastes, Iberian Pyrite Belt, Portugal
author Vieira, A.
author_facet Vieira, A.
Matos, João Xavier
Lopes, Luis
Martins, Ruben
author_role author
author2 Matos, João Xavier
Lopes, Luis
Martins, Ruben
author2_role author
author
author
dc.contributor.none.fl_str_mv Repositório do LNEG
dc.contributor.author.fl_str_mv Vieira, A.
Matos, João Xavier
Lopes, Luis
Martins, Ruben
dc.subject.por.fl_str_mv São Domingos mine
Mining wastes resources
Iberian Pyrite Belt
Portugal
Mina de S. Domingos (concelho de Mértola, Portugal)
Recursos em escombreiras mineiras
Faixa Piritosa Ibérica
topic São Domingos mine
Mining wastes resources
Iberian Pyrite Belt
Portugal
Mina de S. Domingos (concelho de Mértola, Portugal)
Recursos em escombreiras mineiras
Faixa Piritosa Ibérica
description ABSTRACT: 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.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-01-01T00:00:00Z
2022-03-17T12:44:04Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.9/3811
url http://hdl.handle.net/10400.9/3811
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Vieira 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-d829
0873-948X
https://doi.org/10.34637/rr8r-d829
1647-581X
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv LNEG - Laboratório Nacional de Energia e Geologia
publisher.none.fl_str_mv LNEG - Laboratório Nacional de Energia e Geologia
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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