Skip navigation
Skip navigation

U-Pb zicron (ID-TIMS and SHRIMP) evidence for the early ordovician intrusion of metagranites in the late Proterozoic Canaveilles Group of the Pyrenees and the Montagne Noire (France)

Cocherie, Alain; Baudin, Thierry; Autran, Albert; Guerrot, Catherine; Fanning, Christopher; Laumonier, Bernard

Description

Depending on the quality of the zircon grains available for analysis, two methods may be used to date igneous rock emplacement, namely U-Pb TIMS with isotope dilution or in situ U-Pb SIMS (SHRIMP). Both methods have been used to determine, in a precise and accurate manner, the emplacement age of the granitic protolith of the various orthogneisses in the Pyrenean Axial Zone. More specifically, four representative samples of G1, G2 and a "transition gneiss" yielded reliable datings with an...[Show more]

dc.contributor.authorCocherie, Alain
dc.contributor.authorBaudin, Thierry
dc.contributor.authorAutran, Albert
dc.contributor.authorGuerrot, Catherine
dc.contributor.authorFanning, Christopher
dc.contributor.authorLaumonier, Bernard
dc.date.accessioned2015-12-13T23:00:18Z
dc.date.available2015-12-13T23:00:18Z
dc.identifier.issn0037-9409
dc.identifier.urihttp://hdl.handle.net/1885/84060
dc.description.abstractDepending on the quality of the zircon grains available for analysis, two methods may be used to date igneous rock emplacement, namely U-Pb TIMS with isotope dilution or in situ U-Pb SIMS (SHRIMP). Both methods have been used to determine, in a precise and accurate manner, the emplacement age of the granitic protolith of the various orthogneisses in the Pyrenean Axial Zone. More specifically, four representative samples of G1, G2 and a "transition gneiss" yielded reliable datings with an average age of 473 ± 4 Ma for each sample. The surrounding sediments of the Canaveilles Group were constrained by zircon grains from interlayered metarhyodacite and dated at 581 ± 10 Ma using the SHRIMP method, clearly giving this group a late Proterozoic (Vendian) age. Finally, the Somail orthogneiss of the Montagne Noire, equivalent to that of the Canigou, yielded an age of 471 ± 4 Ma with the in situ U-Pb method, which is identical to the dating of the Pyrenean samples. In addition, most of the studied orthogneisses recorded a wide range of significant concordant inherited ages spanning from early Archaean (3.5 Ga) to Pan-African/Cadomian (600-800 Ma). Bearing in mind the calc-alkaline affinity of the studied rocks, this work demonstrates the huge contrast between the active Gondwana margin in the north ("South European terrane") and the remarkably homogeneous continental plate that existed from Arabia to Morocco during the Ordovician.
dc.publisherSOCIETE GEOLOGIQUE DE FRANCE
dc.sourceBulletin De La Societe Geologique De France
dc.subjectKeywords: igneous intrusion; Ordovician; uranium-lead dating; Eastern Hemisphere; Eurasia; Europe; France; Massif Central; Montagne Noire; Pyrenees; Western Europe; World Metavolcanite; Montagne Noire; Ordovician; Orthogneiss; Precambrian; Pyrenees; U-Pb dating; Zircon
dc.titleU-Pb zicron (ID-TIMS and SHRIMP) evidence for the early ordovician intrusion of metagranites in the late Proterozoic Canaveilles Group of the Pyrenees and the Montagne Noire (France)
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume176
dc.date.issued2005
local.identifier.absfor040203 - Isotope Geochemistry
local.identifier.ariespublicationMigratedxPub12322
local.type.statusPublished Version
local.contributor.affiliationCocherie, Alain, Bureau de Recherche Geologique et Miniere
local.contributor.affiliationBaudin, Thierry, Bureau de Recherche Geologique et Miniere
local.contributor.affiliationAutran, Albert, no formal affiliation
local.contributor.affiliationGuerrot, Catherine, Bureau de Recherche Geologique et Miniere
local.contributor.affiliationFanning, Christopher, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationLaumonier, Bernard, Ecole des Mines de Paris
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage269
local.bibliographicCitation.lastpage282
local.identifier.doi10.2113/176.3.269
dc.date.updated2015-12-12T07:33:05Z
local.identifier.scopusID2-s2.0-20544432742
CollectionsANU Research Publications

Download

There are no files associated with this item.


Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  19 May 2020/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator