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Inner shelf paleoenvironmental evolution as a function of land–ocean interactions in the vicinity of the Guadiana River, SW Iberia

2010Journal article Restricted access
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dc.contributor.authorMendes, Isabel
dc.contributor.authorRosa, F.
dc.contributor.authorDias, J. A.
dc.contributor.authorSchönfeld, J.
dc.contributor.authorFerreira, Óscar
dc.contributor.authorPinheiro, J. P.
dc.date.accessioned2017-11-17T12:17:21Z
dc.date.available2017-11-17T12:17:21Z
dc.date.issued2010
dc.description.abstractThis study investigates the land-ocean interactions along the northern margin of the Gulf of Cadiz in the vicinity of the Guadiana River. Benthic foraminifera and sedimentological characteristics were analysed in a sedimentary sequence spanning ca. 5000 years (core 8, 22 m water depth) retrieved from the inner shelf prodeltaic wedge. The analyses were integrated in a temporal framework based on accelerated mass spectrometry radiocarbon dating. Paleoenvironmental changes and sediment transfer mechanisms from the continent to the shelf were investigated and related to climatic oscillations and anthropogenic impact in the region. The results allowed the identification of two main periods of deposition. The first period, from ca. 5150 cal. BP (core base) to 1500-1200 cal. BP, is characterised by a mix of fine and coarse sediments, relatively constant percentages of terrigenous and bioclasts, and benthic foraminifera species characteristic of coastal environments. These features indicate an environment strongly influenced by discharge from the Guadiana River. The second period, from ca. 1500-1200 cal. BP to ca. 200 cal. BP (core top), is characterised by silt-clay fraction dominated sediments, an increase in terrigenous sediment towards the top, and benthic foraminifera species characteristic of environments with low levels of energy. An increase in the level of human occupation associated with changes in climate led to widespread erosion and soil loss to the continental shelf during this period, with possible silting up of the Guadiana eastern distributary, allowing the transport of high amounts of sediment to the shelf by the western distributary that led to the enhancement of fine sedimentation and the formation of the prodeltaic wedge in the area of the studied core.pt_PT
dc.description.sponsorshipPDCTM/P/MAR/15289/1999
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMendes, I., Rosa, F., Dias, J. A., Schönfeld, J., Ferreira, Ó., Pinheiro, J., 2010. Inner shelf paleoenvironmental evolution as a function of land-ocean interactions in the vicinity of the Guadiana River, SW Iberia. Quaternary International, 221, 58-67.pt_PT
dc.identifier.doi10.1016/j.quaint.2009.10.037pt_PT
dc.identifier.ismnAUT: OFE00989; JPI01020;
dc.identifier.issn1040-6182
dc.identifier.urihttp://hdl.handle.net/10400.1/10188
dc.language.isoengpt_PT
dc.publisherElsevierpt_PT
dc.relationImpact of climatic and anthopic variations on the Northern continental shelf, Gulf of Cadiz
dc.relation.publisherversionwww.elsevier.com/locate/quaintpt_PT
dc.subjectPaleoenvironmental evolutionpt_PT
dc.subjectBenthic foraminiferapt_PT
dc.subjectSedimentspt_PT
dc.subjectHolocenept_PT
dc.subjectContinental shelfpt_PT
dc.subjectNorthern Gulf of Cadizpt_PT
dc.titleInner shelf paleoenvironmental evolution as a function of land–ocean interactions in the vicinity of the Guadiana River, SW Iberiapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleImpact of climatic and anthopic variations on the Northern continental shelf, Gulf of Cadiz
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCI%2FCLI%2F60192%2F2004/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/Concurso para Projectos de I&D em todos os Domínios Científicos - 2006/PTDC%2FCLI%2F66393%2F2006/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F18342%2F2004/PT
oaire.citation.endPage67pt_PT
oaire.citation.issue1-2pt_PT
oaire.citation.startPage58pt_PT
oaire.citation.titleQuaternary Internationalpt_PT
oaire.citation.volume221pt_PT
oaire.fundingStreamPOCI
oaire.fundingStreamConcurso para Projectos de I&D em todos os Domínios Científicos - 2006
oaire.fundingStreamSFRH
person.familyNameMendes
person.familyNameFerreira
person.familyNamePinheiro
person.givenNameIsabel Maria de Paiva Pinto
person.givenNameÓscar
person.givenNameJosé Paulo
person.identifier.ciencia-id5C15-242C-FDC0
person.identifier.ciencia-id1F1C-DF44-94C9
person.identifier.orcid0000-0001-7004-7910
person.identifier.orcid0000-0001-9975-0036
person.identifier.orcid0000-0001-7925-9733
person.identifier.ridE-8402-2013
person.identifier.scopus-author-id35838299700
project.funder.identifierhttp://doi.org/10.13039/501100001871
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
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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