Ionic microprobe dating of zircons from the Upper Gneiss Unit (South Limousin, Massif Central, France).

Authors
Alexandrov, P Floc'h, JP Cuney, M Cheilletz, A
Citation
P. Alexandrov et al., Ionic microprobe dating of zircons from the Upper Gneiss Unit (South Limousin, Massif Central, France)., CR AC S IIA, 332(10), 2001, pp. 625-632
Citations number
36
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
332
Issue
10
Year of publication
2001
Pages
625 - 632
Database
ISI
SICI code
1251-8050(200105)332:10<625:IMDOZF>2.0.ZU;2-Z
Abstract
The Vergonzac leptynites in the Tulle anticline (South Limousin, West Massi f Central) belong to the Upper Gneiss unit. The emplacement age of their pr otolith was obtained by U-Pb ion-probe dating on selected zircons with CAME CA IMS 1270. This age is 525 +/- 12 Ma, and is the same as the Mulatet orth ogneiss and the Tulle Augen-gneiss, which belong to the Lower Gneiss unit. This might imply that the protoliths of these two units were emplaced in th e same geotectonic domain. (C) 2001 Academie des sciences / Editions scient ifiques et medicales Elsevier SAS.