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Pb-Nd-Sr Isotope Geochemistry of Metapelites from the Iberian Pyrite Belt and Its Relevance to Provenance Analysis and Mineral Exploration Surveys

2022-03-01Journal article Open access
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dc.contributor.authorLuz, Filipa
dc.contributor.authorA., Mateus
dc.contributor.authorFerreira, Ezequiel
dc.contributor.authorTassinari, Colombo G.
dc.contributor.authorFigueiras, Jorge
dc.date.accessioned2022-07-06T09:29:29Z
dc.date.available2023-03-01T01:31:12Z
dc.date.issued2022-03-01
dc.description.abstractThe Iberian Pyrite Belt is a world-class metallogenic district developed at the Devonian-Carboniferous boundary in the Iberian Variscides that currently has seven active mines: Neves Corvo (Cu-Zn-Sn) and Aljustrel (Cu-Zn) in Portugal, and Riotinto (Cu), Las Cruces (Cu), Aguas Teñidas (Cu-Zn-Pb), Sotiel-Coronada (Cu-Zn-Pb), and La Magdalena (Cu-Zn-Pb) in Spain. The Iberian Pyrite Belt massive sulfide ores are usually hosted in the lower sections of the volcano-sedimentary complex (late Famennian to late Visean), but they also occur in the uppermost levels of the phyllite-quartzite group at the Neves Corvo deposit, stratigraphically below the volcano-sedimentary complex. A Pb-Nd-Sr isotope dataset was obtained for 98 Iberian Pyrite Belt metapelite samples (from Givetian to upper Visean), representing several phyllite-quartzite group and volcano-sedimentary complex sections that include the footwall and hanging-wall domains of ore horizons at the Neves Corvo, Aljustrel, and Lousal mines. The combination of whole-rock Nd and Sr isotopes with Th/Sc ratios shows that the siliciclastic components of Iberian Pyrite Belt metapelites are derived from older quartz-feldspathic basement rocks (–11 ≤ εNdinitial ≤ –8 and (87Sr/86Sr)i up to 0.727). The younger volcano-sedimentary complex metapelites (upper Tournaisian) often comprise volcanic-derived constituents with a juvenile isotopic signature, shifting the εNdi up to +0.2. The Pb isotope data confirm that the phyllite-quartzite group and volcano-sedimentary complex successions are crustal reservoirs for metals found in the deposits. In Neves Corvo, where there is more significant Sn- and Cu-rich mineralization, the higher (206Pb/204Pb)i and (207Pb/204Pb)i values displayed by phyllite-quartzite group and lower volcano-sedimentary complex metapelites (up to 15.66 and 18.33, respectively) suggest additional contributions to the metal budget from a deeper and more radiogenic source. The proximity to Iberian Pyrite Belt massive sulfide ore systems hosted in metapelite successions is observed when (207Pb/204Pb)i >15.60 and Fe2O3/TiO2 or (Cu+Zn+Pb)/Sc >10. These are important criteria that should be considered in geochemical exploration surveys designed for the Iberian Pyrite Belt.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.5382/econgeo.4869pt_PT
dc.identifier.urihttp://hdl.handle.net/10451/53663
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSociety of Economic Geologistspt_PT
dc.relationInstitute Dom Luiz
dc.relationMulti-elemental and isotope geochemistry of metapelites from the Volcano-Sedimentary Complex Iberian Pyrite Belt, Portugal: unravelling fingerprints of diferent sources, sedimentary environments and exhalative-hydrothermal activity.
dc.relation.publisherversionhttps://pubs.geoscienceworld.org/segweb/economicgeology/article-abstract/117/2/423/606393/Pb-Nd-Sr-Isotope-Geochemistry-of-Metapelites-frompt_PT
dc.subjectDevonianpt_PT
dc.subjectIberian pyrite beltpt_PT
dc.subjectGeochemical exploration surveyspt_PT
dc.subjectMineral explorationpt_PT
dc.titlePb-Nd-Sr Isotope Geochemistry of Metapelites from the Iberian Pyrite Belt and Its Relevance to Provenance Analysis and Mineral Exploration Surveyspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleInstitute Dom Luiz
oaire.awardTitleMulti-elemental and isotope geochemistry of metapelites from the Volcano-Sedimentary Complex Iberian Pyrite Belt, Portugal: unravelling fingerprints of diferent sources, sedimentary environments and exhalative-hydrothermal activity.
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FGEO%2F50019%2F2019/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/PD%2FBD%2F114485%2F2016/PT
oaire.citation.endPage454pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage423pt_PT
oaire.citation.titleEconomic Geologypt_PT
oaire.citation.volume117pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamOE
person.familyNameLuz
person.familyNameNunes Mateus
person.familyNameEstremina Carneiro Brandão Ferreira
person.givenNameFilipa
person.givenNameAntónio Manuel
person.givenNameEzequiel José
person.identifierD-3727-2011
person.identifierhttps://scholar.google.pt/citations?hl=pt-BR&user=y74dWQgAAAAJ
person.identifier.ciencia-idF513-6C37-0EB0
person.identifier.ciencia-id3012-5AFF-429F
person.identifier.ciencia-id4515-F2F6-F865
person.identifier.orcid0000-0002-2913-2803
person.identifier.orcid0000-0003-2623-1539
person.identifier.ridI-1234-2015
person.identifier.scopus-author-id55674640300
person.identifier.scopus-author-id6701374691
person.identifier.scopus-author-id56373819900
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.embargofctObrigação legal imposta pela editorapt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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