Repository logo
 
Publication

Preliminary account of the Silurian carbon isotope record (d13Corg) from the Barrancos region, Ossa Morena Zone, Portugal

2011Conference object Open access
Simple item page
dc.contributor.authorLopes, Gilda
dc.contributor.authorFernandes, Paulo
dc.contributor.authorGoodhue, R.
dc.contributor.authorPereira, Zélia
dc.contributor.authorPiçarra, J. M.
dc.date.accessioned2014-09-24T14:08:05Z
dc.date.available2014-09-24T14:08:05Z
dc.date.issued2011
dc.date.updated2014-09-23T10:01:06Z
dc.description.abstractThe Barrancos region provides one of the reference sections for the Silurian of the Ossa Morena Zone in Portugal. In this area the Silurian succession is condensed, with a maximum thickness of 50 m and the ages provided by graptolite faunas indicates that all the Silurian system is represented here. The lithologies are fairly homogenous throughout the succession consisting of black carbonaceous shales interbedded with black cherts, that were deposited in marine basins that developed at the northen margins of the Gondwana continent. This study is the first attempt to characterize the variation of 􀀙13Corg in this region, in order to assess well-documented Silurian climatic events. The studied section is located at Monte do Carreba, near Barrancos village, and consists of a 45 m thick succession of black shales and cherts with graptolite faunas that indicates a Llandovery to lower Ludlow age. The base of the section is faulted against Upper Ordovician greywackes and quartzites. In this section 􀀙13Corg shows a baseline of consistent low values ranging from -25.88 to -25.10%. This is interrupted by three positive excursions with maximum values of: -22.73% at the transition between the Llandovery (Telychian) and Wenlock (Sheinwoodian), -23.33% at the Homerian and -23.09% at the transition between the Wenlock and Ludlow (Gorstian). The excursions have positive shifts between +2.55 and +3.15% and are tentatively related to the three first global climatic events recognized for the Silurian (Ireviken, Mulde and Linde). Although this study is a preliminary account of 􀀙13Corg in this region, it could provide usefull data for the recognition and discussion of climatic global events in high latitude regions as was the OMZ located during Silurian times and for sections with high level of thermal maturation.por
dc.description.sponsorshipFundação para a Ciência e Tecnologia (FCT) (PhD grant SFRH/BD/48534/2008).por
dc.identifier.citationLopes, Gilda; Fernandes, Paulo; Goodhue, Robbie; Pereira, Zélia; Piçarra, J.M.Preliminary account of the Silurian carbon isotope record (d13Corg) from the Barrancos region, Ossa Morena Zone, Portugal, Trabalho apresentado em Goldschmidt Conference 2011, In Mineralogical Magazine, Praga, 2011.por
dc.identifier.otherAUT: PFE01874;
dc.identifier.urihttp://hdl.handle.net/10400.1/5107
dc.language.isoengpor
dc.peerreviewedyespor
dc.relationPALYNOLOGY AND CARBON ISOTOPE STRATIGRAPHY OF THE ORDOVICIAN - SILURIAN ROCKS OF PORTUGAL: PALAEOGEOGRAPHIC AND PALAEOCLIMATIC IMPLICATIONS
dc.titlePreliminary account of the Silurian carbon isotope record (d13Corg) from the Barrancos region, Ossa Morena Zone, Portugalpor
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitlePALYNOLOGY AND CARBON ISOTOPE STRATIGRAPHY OF THE ORDOVICIAN - SILURIAN ROCKS OF PORTUGAL: PALAEOGEOGRAPHIC AND PALAEOCLIMATIC IMPLICATIONS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F48534%2F2008/PT
oaire.citation.conferencePlacePraga, República Checapor
oaire.citation.endPage1355por
oaire.citation.startPage1355por
oaire.citation.titleGoldschmidt Conference 2011por
person.familyNameRodrigues Lopes
person.familyNameFernandes
person.givenNameGilda Maria
person.givenNamePaulo
person.identifier417492
person.identifier422469
person.identifier.ciencia-id051D-A133-65D9
person.identifier.orcid0000-0002-6866-5127
person.identifier.orcid0000-0003-4888-0230
person.identifier.ridJ-6577-2014
person.identifier.scopus-author-id57197129025
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspor
rcaap.typeconferenceObjectpor
relation.isAuthorOfPublication5cd06189-201b-4b3a-b8a7-d5c63941f17c
relation.isAuthorOfPublicationa2d98df3-a9c2-4364-a737-25b4e89df80b
relation.isAuthorOfPublication.latestForDiscoverya2d98df3-a9c2-4364-a737-25b4e89df80b
relation.isProjectOfPublicationef67f01e-7790-4b0f-bf92-9b01d90114ad
relation.isProjectOfPublication.latestForDiscoveryef67f01e-7790-4b0f-bf92-9b01d90114ad

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Preliminary account of the silurian carbon isotope record from the Barrancos regions, Ossa Morena zone, Portugal.pdf
Size:
67.9 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.61 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

CIM4-Vários