319 +/- 7 Ma crystallization age for the Blond granite (northwest Limousin, French Massif Central) obtained by U/Pb ion-probe dating of zircons

Authors
Alexandrov, P Cheilletz, A Deloule, E Cuney, M
Citation
P. Alexandrov et al., 319 +/- 7 Ma crystallization age for the Blond granite (northwest Limousin, French Massif Central) obtained by U/Pb ion-probe dating of zircons, CR AC S IIA, 330(9), 2000, pp. 617-622
Citations number
14
Categorie Soggetti
Earth Sciences
Journal title
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE A-SCIENCES DELA TERRE ET DES PLANETES
ISSN journal
12518050 → ACNP
Volume
330
Issue
9
Year of publication
2000
Pages
617 - 622
Database
ISI
SICI code
1251-8050(20000530)330:9<617:3+7MCA>2.0.ZU;2-6
Abstract
Zircons from the Blond leucogranite (NW Limousin, French Massif Central) ha ve been dated by U/Pb isotope analysis on the CAMECA IMS 1270 ion-probe fac ility at CRPG-CNRS. The obtained age of 319 +/- 7 Ma, different from previo us Rb/Sr whole rock isochron age determination (301 +/- 5 Ma), integrates t his granite in the Late Hercynian history of the Limousin, together with ot her Namuro-Westphalian granitoids. U/Pb isotope ion-probe analysis of zirco ns appears to be a particularly useful method for dating relatively recent highly fractionated granites. (C) 2000 Academie des sciences / Editions sci entifiques et medicales Elsevier SAS.