Sea-level Rise and Anthropogenic Activities Recorded in the Late Pleistocene/Holocene Sedimentary Infill of the Guadiana Estuary (SW Iberia)

This study reviews data on sea-level rise during the last 13000 yr cal. BP (13 kyr) as recorded in the estuarine sediments of the Guadiana River (SE Portugal, SW Spain). We combined new data from a 63 m-long borehole, drilled through the entire postglacial sedimentary sequence, with information on f...

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Autores: Delgado Rodríguez, Joaquín María, Boski, T., Nieto, J. M., Pereira, L., Moura, D., Gomes, A., Sousa, C., García-Tenorio García-Balmaseda, Rafael
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2012
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/162905
Acceso en línea:https://hdl.handle.net/11441/162905
https://doi.org/10.1016/j.quascirev.2011.12.002
Access Level:acceso abierto
Palabra clave:Late Pleistocene
Holocene
Sea-level rise
Geochemical record
Guadiana Estuary
Iberian Pyrite Belt
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spelling Sea-level Rise and Anthropogenic Activities Recorded in the Late Pleistocene/Holocene Sedimentary Infill of the Guadiana Estuary (SW Iberia)Delgado Rodríguez, Joaquín MaríaBoski, T.Nieto, J. M.Pereira, L.Moura, D.Gomes, A.Sousa, C.García-Tenorio García-Balmaseda, RafaelLate PleistoceneHoloceneSea-level riseGeochemical recordGuadiana EstuaryIberian Pyrite BeltThis study reviews data on sea-level rise during the last 13000 yr cal. BP (13 kyr) as recorded in the estuarine sediments of the Guadiana River (SE Portugal, SW Spain). We combined new data from a 63 m-long borehole, drilled through the entire postglacial sedimentary sequence, with information on five previously studied cores. By integrating sedimentological, geochemical and palaeontological proxies, we were able to make a palaeoenvironmental reconstruction of the Guadiana terminal palaeovalley during the last 13 kyr and propose a curve of sea-level rise for the SW Iberian Atlantic margin. Our foraminifera-based palaeoecological reconstruction, anchored to a 14C age model, reveals rapid sea-level rise from 13 kyr, interrupted during the Younger Dryas and resuming ca 11.5 kyr. The pace of marine transgression slackened ca. 7.5 kyr and since then has progressed upwards at a rate of 1.2 mm yr−1. Holocene–Anthropocene sediments from two boreholes were also analysed to assess the timing, levels and sources of trace metals produced by acid mine drainage from the Iberian Pyrite Belt. Study of metal/aluminium ratios through the profiles allowed background metal concentrations to be estimated from lithostratigraphic units older than ca. 5 kyr (i.e. unaffected by anthropogenic activities). Human activities are especially evident from 4.5 kyr (the beginning of the Copper Age), with anthropogenic sources of metal fluxes prevailing over natural sources (especially Pb, Co, Ni, and Mn, and, to a lesser extent, Zn, Cu, and Ni). Mining activities became particularly intensive between the late Bronze Age and the Roman period (3–1.5 kyr), when the highest metal enrichment factors were recorded: EFPb ≈ 2, EFCd > 10, EFCr ≈ 2, EFCu ≈ 3, EFZn = 1.4.This study reveals the utility of postglacial sedimentary records for reconstructing historical changes in regional water-sediment quality and separating natural and anthropogenic sources of geochemical contaminants.ElsevierCristalografía, Mineralogía y Química AgrícolaFísica Aplicada II2012info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/162905https://doi.org/10.1016/j.quascirev.2011.12.002reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésQuaternary Science Reviews, 33, 121-141.https://doi.org/10.1016/j.quascirev.2011.12.002info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1629052026-06-17T12:51:07Z
dc.title.none.fl_str_mv Sea-level Rise and Anthropogenic Activities Recorded in the Late Pleistocene/Holocene Sedimentary Infill of the Guadiana Estuary (SW Iberia)
title Sea-level Rise and Anthropogenic Activities Recorded in the Late Pleistocene/Holocene Sedimentary Infill of the Guadiana Estuary (SW Iberia)
spellingShingle Sea-level Rise and Anthropogenic Activities Recorded in the Late Pleistocene/Holocene Sedimentary Infill of the Guadiana Estuary (SW Iberia)
Delgado Rodríguez, Joaquín María
Late Pleistocene
Holocene
Sea-level rise
Geochemical record
Guadiana Estuary
Iberian Pyrite Belt
title_short Sea-level Rise and Anthropogenic Activities Recorded in the Late Pleistocene/Holocene Sedimentary Infill of the Guadiana Estuary (SW Iberia)
title_full Sea-level Rise and Anthropogenic Activities Recorded in the Late Pleistocene/Holocene Sedimentary Infill of the Guadiana Estuary (SW Iberia)
title_fullStr Sea-level Rise and Anthropogenic Activities Recorded in the Late Pleistocene/Holocene Sedimentary Infill of the Guadiana Estuary (SW Iberia)
title_full_unstemmed Sea-level Rise and Anthropogenic Activities Recorded in the Late Pleistocene/Holocene Sedimentary Infill of the Guadiana Estuary (SW Iberia)
title_sort Sea-level Rise and Anthropogenic Activities Recorded in the Late Pleistocene/Holocene Sedimentary Infill of the Guadiana Estuary (SW Iberia)
dc.creator.none.fl_str_mv Delgado Rodríguez, Joaquín María
Boski, T.
Nieto, J. M.
Pereira, L.
Moura, D.
Gomes, A.
Sousa, C.
García-Tenorio García-Balmaseda, Rafael
author Delgado Rodríguez, Joaquín María
author_facet Delgado Rodríguez, Joaquín María
Boski, T.
Nieto, J. M.
Pereira, L.
Moura, D.
Gomes, A.
Sousa, C.
García-Tenorio García-Balmaseda, Rafael
author_role author
author2 Boski, T.
Nieto, J. M.
Pereira, L.
Moura, D.
Gomes, A.
Sousa, C.
García-Tenorio García-Balmaseda, Rafael
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Cristalografía, Mineralogía y Química Agrícola
Física Aplicada II
dc.subject.none.fl_str_mv Late Pleistocene
Holocene
Sea-level rise
Geochemical record
Guadiana Estuary
Iberian Pyrite Belt
topic Late Pleistocene
Holocene
Sea-level rise
Geochemical record
Guadiana Estuary
Iberian Pyrite Belt
description This study reviews data on sea-level rise during the last 13000 yr cal. BP (13 kyr) as recorded in the estuarine sediments of the Guadiana River (SE Portugal, SW Spain). We combined new data from a 63 m-long borehole, drilled through the entire postglacial sedimentary sequence, with information on five previously studied cores. By integrating sedimentological, geochemical and palaeontological proxies, we were able to make a palaeoenvironmental reconstruction of the Guadiana terminal palaeovalley during the last 13 kyr and propose a curve of sea-level rise for the SW Iberian Atlantic margin. Our foraminifera-based palaeoecological reconstruction, anchored to a 14C age model, reveals rapid sea-level rise from 13 kyr, interrupted during the Younger Dryas and resuming ca 11.5 kyr. The pace of marine transgression slackened ca. 7.5 kyr and since then has progressed upwards at a rate of 1.2 mm yr−1. Holocene–Anthropocene sediments from two boreholes were also analysed to assess the timing, levels and sources of trace metals produced by acid mine drainage from the Iberian Pyrite Belt. Study of metal/aluminium ratios through the profiles allowed background metal concentrations to be estimated from lithostratigraphic units older than ca. 5 kyr (i.e. unaffected by anthropogenic activities). Human activities are especially evident from 4.5 kyr (the beginning of the Copper Age), with anthropogenic sources of metal fluxes prevailing over natural sources (especially Pb, Co, Ni, and Mn, and, to a lesser extent, Zn, Cu, and Ni). Mining activities became particularly intensive between the late Bronze Age and the Roman period (3–1.5 kyr), when the highest metal enrichment factors were recorded: EFPb ≈ 2, EFCd > 10, EFCr ≈ 2, EFCu ≈ 3, EFZn = 1.4.This study reveals the utility of postglacial sedimentary records for reconstructing historical changes in regional water-sediment quality and separating natural and anthropogenic sources of geochemical contaminants.
publishDate 2012
dc.date.none.fl_str_mv 2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/162905
https://doi.org/10.1016/j.quascirev.2011.12.002
url https://hdl.handle.net/11441/162905
https://doi.org/10.1016/j.quascirev.2011.12.002
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Quaternary Science Reviews, 33, 121-141.
https://doi.org/10.1016/j.quascirev.2011.12.002
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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