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U–Pb laser ablation ICP-MS zircon dating across the Ediacaran–Cambrian transition of the Montagne Noire, southern France

2017-12Artigo científico Acesso aberto
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dc.contributor.authorPadel, Maxime
dc.contributor.authorÁlvaro, J. Javier
dc.contributor.authorClausen, Sébastien
dc.contributor.authorGuillot, François
dc.contributor.authorPoujol, Marc
dc.contributor.authorChichorro, Martim
dc.contributor.authorMonceret, Éric
dc.contributor.authorPereira, M. Francisco
dc.contributor.authorVizcaïno, Daniel
dc.contributor.institutionGeoBioTec - Geobiociências, Geoengenharias e Geotecnologias
dc.contributor.institutionDCT - Departamento de Ciências da Terra
dc.contributor.pblAcadémie des Sciences
dc.date.accessioned2018-07-19T22:11:54Z
dc.date.available2018-07-19T22:11:54Z
dc.date.issued2017-12
dc.descriptionThe authors thank constructive criticism made by O. Blein and B. Laumonier, and founding from the RGF program of the French Geological Survey (BRGM). This paper is a contribution to project CGL2013-48877-P from Spanish MINECO.
dc.description.abstractU–Pb laser ablation inductively coupled plasma mass spectrometry was used for dating zircon grains extracted from four sedimentary and volcano sedimentary rocks of the Montagne Noire encompassing the presumed Ediacaran–Cambrian boundary interval. Magmatic zircon from two samples from the basal and middle parts of the Rivernous Formation (a rhyolitic tuff) were deposited at 542.5 ± 1 Ma and 537.1 ± 2.5 Ma, bracketing the 541 Ma age presently admitted as being at the Ediacaran–Cambrian boundary. In addition, a piece of sandstone from the underlying Rivernous Formation containing mostly euhedral zircon grains, suggesting proximal magmatic sources, yields Neoproterozoic dates ranging from 574 Ma to 1 Ga, and subsidiary older dates from 1.25 to 2.75 Ga. Another piece of sandstone from the overlying Marcory Formation yielded mostly rounded zircon grains probably issued from more remote areas, with a large spectrum dominated by Neoproterozoic dates as well as older ages up to 3.2 Ga. A comparison of both kinds of sandstone suggests a significant change in provenance, changing from a restricted source area during the Ediacaran to a much larger source domain during the Cambrian Epoch 2 that recorded contributions from different cratons of Gondwana.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent11
dc.format.extent2654408
dc.identifier.doi10.1016/j.crte.2016.11.002
dc.identifier.issn1631-0713
dc.identifier.otherPURE: 5465263
dc.identifier.otherPURE UUID: bb024685-d4fd-4718-a112-6265678b30af
dc.identifier.otherScopus: 85026523976
dc.identifier.otherWOS: 000418834100002
dc.identifier.urihttp://www.scopus.com/inward/record.url?scp=85026523976&partnerID=8YFLogxK
dc.identifier.urlhttps://www.scopus.com/pages/publications/85026523976
dc.language.isoeng
dc.peerreviewedyes
dc.subjectCambrian
dc.subjectEdiacaran
dc.subjectMontagne Noire
dc.subjectU–Pb dating
dc.subjectGlobal and Planetary Change
dc.subjectGeneral Earth and Planetary Sciences
dc.titleU–Pb laser ablation ICP-MS zircon dating across the Ediacaran–Cambrian transition of the Montagne Noire, southern Franceen
dc.typejournal article
degois.publication.firstPage380
degois.publication.issue8
degois.publication.lastPage390
degois.publication.titleComptes Rendus - Geoscience
degois.publication.volume349
dspace.entity.typePublication
rcaap.rightsopenAccess

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