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Quaternary chronostratigraphic framework and sedimentary processes for the Gulf of Cadiz and Portuguese Contourite Depositional Systems derived from Natural Gamma Ray records

hal.structure.identifierGéosciences Montpellier
dc.contributor.authorLOFI, Johanna
hal.structure.identifierUniversidade do Algarve [UAlg]
dc.contributor.authorVOEKLER, A.H.L.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDUCASSOU, Emmanuelle
hal.structure.identifierRoyal Holloway University London
dc.contributor.authorHERNANDEZ-MOLINA, F. Javier
hal.structure.identifierDepartamento de Geología [Salamanca]
dc.contributor.authorSIERRO, Francisco J.
hal.structure.identifierUniversität Heidelberg [Heidelberg] = Heidelberg University
dc.contributor.authorBAHR, Andre
hal.structure.identifierCentre de Recherche & Innovation Gaz et Energies Nouvelles - GDF Suez [CRIGEN]
dc.contributor.authorGALVANI, Aurelie
hal.structure.identifierUniversiteit Utrecht / Utrecht University [Utrecht]
dc.contributor.authorLOURENS, Lucas J.
hal.structure.identifierGeological Survey of Spain, Madrid
dc.contributor.authorPARDO-IGUZQUIZA, Eulogio
hal.structure.identifierGéosciences Montpellier
dc.contributor.authorPEZARD, Philippe
hal.structure.identifierDept. Stratigraphy and Palaeontology, Granada
dc.contributor.authorRODRIGUEZ-TOVAR, F J
hal.structure.identifierTexas A&M University [College Station]
dc.contributor.authorWILLIAMS, Trevor
dc.date.accessioned2024-04-25T07:43:53Z
dc.date.available2024-04-25T07:43:53Z
dc.date.issued2016-07-01
dc.identifier.issn0025-3227
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/199335
dc.description.abstractEnThe Contourite Depositional Systems (CDS) in the Gulf of Cádiz and on the West Iberian margin preserve a unique archive of Mediterranean Outflow Water (MOW) variability over the past 5.3 Ma. These CDS have been recently drilled in several places during the IODP Expedition 339. These drill sites now offer a new window to the internal Pliocene and Quaternary architecture of the CDS. In this study, we use downhole and core Gamma Ray (GR) data acquired from 5 sites drilled in the CDS along the middle slope and 1 site drilled in the deeper setting of the lower slope, out of the MOW path. The GR data primarily tracks the clay content in the sediment and is the expression of sediment supply and, for sites drilled in the CDS, of the bottom current processes. Both appear astronomically controlled as shown by spectral analysis performed on the GR data. Results also reveal that the GR log patterns correlate well across the sites over the last 1.4 My. Several GR horizons corresponding to drops in GR values were identified, most of which fit with coarse-grained deposits observed in cores and interpreted as contourite beds. The GR horizons are interpreted as isochronous horizons, providing a regional scale chronostratigraphic framework for the CDS depositional records with an accuracy of ~ 20 ky. We further assess the spatial and temporal variability of the CDS hiatuses at the regional scale.
dc.language.isoen
dc.publisherElsevier
dc.subject.enGamma Ray
dc.subject.enContourites
dc.subject.enMOW
dc.subject.enSea-level
dc.subject.enPrecession
dc.subject.enQuatemary
dc.subject.enGulf of Cadiz
dc.title.enQuaternary chronostratigraphic framework and sedimentary processes for the Gulf of Cadiz and Portuguese Contourite Depositional Systems derived from Natural Gamma Ray records
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.margeo.2015.12.005
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Océanographie
bordeaux.journalMarine Geologyen_US
bordeaux.page40-57
bordeaux.volume377
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
bordeaux.peerReviewedoui
bordeaux.import.sourcehal
hal.identifierhal-01690109
hal.version1
hal.popularnon
hal.audienceInternationale
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Marine%20Geology&rft.date=2016-07-01&rft.volume=377&rft.spage=40-57&rft.epage=40-57&rft.eissn=0025-3227&rft.issn=0025-3227&rft.au=LOFI,%20Johanna&VOEKLER,%20A.H.L.&DUCASSOU,%20Emmanuelle&HERNANDEZ-MOLINA,%20F.%20Javier&SIERRO,%20Francisco%20J.&rft.genre=article


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