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SHRIMP dating of zircons in eclogite from the Variscan basement in north-eastern Sardinia (Italy)

Palmeri, Rosaria; Fanning, Christopher; Franceschelli, Marcello; Memmi, Isabella; Ricci, Carlo

Description

SHRIMP (Sensitive High-Resolution Ion Microprobe) U-Pb ages of zircons from a single sample of mafic eclogite (Punta de li Tulchi, Sardinia, Italy) are reported. The study under cathodoluminescence (CL) reveals two groups of metamorphic zircons and the SHRIMP analyses allow recognition of three ages: 1) 453 ± 14 Ma; 2) 400 ± 10 Ma, and 3) 327 ± 7 Ma. The age of 453 ± 14 Ma could be that of the magmatic protolith and an age of 327 ± 7 Ma can reasonably be attributed to the main Variscan...[Show more]

dc.contributor.authorPalmeri, Rosaria
dc.contributor.authorFanning, Christopher
dc.contributor.authorFranceschelli, Marcello
dc.contributor.authorMemmi, Isabella
dc.contributor.authorRicci, Carlo
dc.date.accessioned2015-12-13T22:52:29Z
dc.date.available2015-12-13T22:52:29Z
dc.identifier.issn0028-3649
dc.identifier.urihttp://hdl.handle.net/1885/81588
dc.description.abstractSHRIMP (Sensitive High-Resolution Ion Microprobe) U-Pb ages of zircons from a single sample of mafic eclogite (Punta de li Tulchi, Sardinia, Italy) are reported. The study under cathodoluminescence (CL) reveals two groups of metamorphic zircons and the SHRIMP analyses allow recognition of three ages: 1) 453 ± 14 Ma; 2) 400 ± 10 Ma, and 3) 327 ± 7 Ma. The age of 453 ± 14 Ma could be that of the magmatic protolith and an age of 327 ± 7 Ma can reasonably be attributed to the main Variscan collisional event in Sardinia, which produced Barrovian-type metamorphism, and retrogression of eclogite under amphibolite-facies metamorphism. The intermediate age 400 ± 10 Ma is difficult to interpret and it could represent either the age of the eclogite facies metamorphism or it is a result of Pb-loss during the main Variscan event at 327 ± 7 Ma.
dc.publisherE. Schweizerbartsche Verlagsbuchhandlung
dc.sourceNEUES JAHRBUCH FUR MINERALOGIE-MONATSHEFTE
dc.subjectKeywords: cathodoluminescence; eclogite; geochronology; Hercynian orogeny; Paleozoic; SHRIMP dating; zircon; Eurasia; Europe; Italy; Sardinia; Southern Europe Eclogite; Sardinia; SHRIMP II U - Pb dating; Variscan orogeny; Zircon
dc.titleSHRIMP dating of zircons in eclogite from the Variscan basement in north-eastern Sardinia (Italy)
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume14
dc.date.issued2004
local.identifier.absfor040203 - Isotope Geochemistry
local.identifier.ariespublicationMigratedxPub9871
local.type.statusPublished Version
local.contributor.affiliationPalmeri, Rosaria, Museo Nazionale do Antartide
local.contributor.affiliationFanning, Christopher, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationFranceschelli, Marcello, Universita di Cagliari
local.contributor.affiliationMemmi, Isabella, Universita di Siena
local.contributor.affiliationRicci, Carlo, Universita di Siena
local.bibliographicCitation.issue6
local.bibliographicCitation.startpage275
local.bibliographicCitation.lastpage288
local.identifier.doi10.1127/0028-3649/2004/2004-0275
dc.date.updated2015-12-11T10:51:14Z
local.identifier.scopusID2-s2.0-3042778518
CollectionsANU Research Publications

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