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Geochemistry and mineralogy of the Lower Cretaceous of the Lusitanian Basin (western Portugal): Deciphering palaeoclimates from weathering indices and integrated vegetational data

2016-03Journal article Restricted access
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dc.contributor.authorDinis, Pedro A.
dc.contributor.authorDinis, Jorge L.
dc.contributor.authorMendes, Mário Miguel
dc.contributor.authorRey, Jacques
dc.contributor.authorPais, João
dc.date.accessioned2017-04-07T15:57:10Z
dc.date.available2017-04-07T15:57:10Z
dc.date.issued2016-03
dc.description.abstractThe present study investigates the climatic influence on the geochemistry and mineralogy of the Lower Cretaceous succession of the Ericeira region (Lusitanian Basin, western Portugal). Palaeoclimatic conditions are inferred from a combination of weathering indices and independent palynological and palaeobotanical data. A composite weathering intensity index is computed from selected geochemical and mineralogical data. The concentrations of some elements (Co, Ni, Sc, Th, V, Y, Zn, Zr) indicate variable contributions of sediments from the Lusitanian Basin margin and Iberian hinterland. It is demonstrated that the weathering intensity values are largely influenced by source area geology. The increases in weathering intensity following major unconformities (Late Barremian and Late Aptian) are partially attributed to the arrival of detritus from an evolved regolith sequence in the Iberian hinterland. A combined analysis of independent proxies is found necessary to conveniently discern the roles played by distinct processes on the weathering intensity and investigate the palaeoclimatic conditions. (C) 2015 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
dc.identifier.doi10.1016/j.crte.2015.09.003
dc.identifier.issn1631-0713
dc.identifier.urihttp://hdl.handle.net/10400.1/9633
dc.language.isoeng
dc.peerreviewedyes
dc.relationThe record of coupled oceanic-atmospheric changes analysed by Carbon isotopes and palaeobotany in the Portuguese mid-Cretaceous: chemostratigraphy and palaeoecology (CretaCarbo)
dc.relation.isbasedonWOS:000373518700006
dc.titleGeochemistry and mineralogy of the Lower Cretaceous of the Lusitanian Basin (western Portugal): Deciphering palaeoclimates from weathering indices and integrated vegetational data
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleThe record of coupled oceanic-atmospheric changes analysed by Carbon isotopes and palaeobotany in the Portuguese mid-Cretaceous: chemostratigraphy and palaeoecology (CretaCarbo)
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTE-GIX%2F104999%2F2008/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876-PPCDTI/PTDC%2FCTE-GIX%2F113983%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMAR%2F04292%2F2013/PT
oaire.citation.endPage149
oaire.citation.issue2
oaire.citation.startPage139
oaire.citation.titleComptes Rendus Géoscience
oaire.citation.volume348
oaire.fundingStream3599-PPCDT
oaire.fundingStream5876-PPCDTI
oaire.fundingStream5876
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.rightsrestrictedAccess
rcaap.typearticle
relation.isProjectOfPublication156cc046-a653-4022-a073-3e00ae926711
relation.isProjectOfPublication3970d1a5-de7f-4b07-ae2e-828dade1f81b
relation.isProjectOfPublicationb84cb732-8d6b-43ff-974b-01c29a129290
relation.isProjectOfPublication.latestForDiscovery156cc046-a653-4022-a073-3e00ae926711

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