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Insights of Pb isotopic signature into the historical evolution and sources of Pb contamination in a sediment core of the southwestern Iberian Atlantic shelf

2017-05Journal article Restricted access
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dc.contributor.authorMil-Homens, Mario
dc.contributor.authorVale, Carlos
dc.contributor.authorBrito, Pedro
dc.contributor.authorNaughton, Filipa
dc.contributor.authorDrago, Teresa
dc.contributor.authorRaimundo, Joana
dc.contributor.authorAnes, Barbara
dc.contributor.authorSchmidt, Sabine
dc.contributor.authorCaetano, Miguel
dc.date.accessioned2019-11-20T15:07:36Z
dc.date.available2019-11-20T15:07:36Z
dc.date.issued2017-05
dc.description.abstractStable Pb isotopic ratios and concentrations of Al, Cu and Pb were measured in a 5 m long sediment core (VC2B) retrieved at 96 m water depth in the southwestern Iberian Atlantic shelf. Five phases during the last 9.5 kyrs were identified, two of them (Roman Period and modern mining) marked by a decrease of Pb-206/Pb-207 ratios reflecting additional inputs of Pb derived from mining activities. The Roman Period was also characterized by high Pb-208/Pb-206 ratios suggesting the exploitation of the outcropping portion of the orebody intensely weathered when compared with the other formations later mined. The shift of Pb-208/Pb-206 ratios towards linearity took approximately 1.0 kyrs, which may mirror the time of environmental recovery from the impact of Roman mining activities. The application of a mixing model allowed the quantification of the contribution associated with anthropogenic mining activities to the shelf sediments. The maximum values of Pb contamination occurred in the 20th century. This study gives direct evidence of Pb and Cu exploitation over the last 2000 years. The stable Pb isotopic signatures point to legacy of mining activities that are still the prevailing metal source recorded in the southwestern Iberian Atlantic shelf sediments. (C) 2017 Elsevier B.V. All rights reserved.
dc.description.sponsorshipFoundation for Science and Technology (FCT) through the POPEI project [FCT/PDCT/MAR/55618/2004]
dc.description.sponsorshipCLIMHOL project [PTDC/AAC-CLI/100157/2008]
dc.description.sponsorshipFCT [UID/Multi/04423/2013]
dc.description.sponsorshipEuropean Regional Development Fund (ERDF)
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.scitotenv.2017.01.204
dc.identifier.issn0048-9697
dc.identifier.issn1879-1026
dc.identifier.urihttp://hdl.handle.net/10400.1/13124
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier Science Bv
dc.subjectSea-Level Rise
dc.subjectC-14 Yr Bp
dc.subjectAtmospheric Pb
dc.subjectMining activities
dc.subjectGuadiana River
dc.subjectLead Ppution
dc.subjectPyrite belt
dc.subjectArchaeological approach
dc.subjectAnthropogenic impact
dc.subjectMetal concentrations
dc.titleInsights of Pb isotopic signature into the historical evolution and sources of Pb contamination in a sediment core of the southwestern Iberian Atlantic shelf
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876-PPCDTI/PTDC%2FAAC-CLI%2F100157%2F2008/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04423%2F2013/PT
oaire.citation.endPage484
oaire.citation.startPage473
oaire.citation.titleScience of the Total Environment
oaire.citation.volume586
oaire.fundingStream5876-PPCDTI
oaire.fundingStream5876
person.familyNameNaughton
person.givenNameFilipa
person.identifierR-000-JPJ
person.identifier.ciencia-id1419-F239-1CEA
person.identifier.orcid0000-0002-3055-9396
person.identifier.ridE-7659-2013
person.identifier.scopus-author-id23009659300
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.rightsrestrictedAccess
rcaap.typearticle
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relation.isAuthorOfPublication.latestForDiscovery53f17112-41aa-4bd9-a437-50736dbde6f9
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