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

被引：16

作者：

Alexandrov, P

Cheilletz, A

Deloule, E

Cuney, M

机构：

[1] CNRS, CRPG, F-54501 Vandoeuvre Nancy, France

[2] Fac Sci, F-54506 Vandoeuvre Nancy, France

来源：

COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE A-SCIENCES DE LA TERRE ET DES PLANETES | 2000年 / 330卷 / 09期

关键词：

U/Pb geochronology; ion-probe; zircons; hercynian; Limousin; France;

D O I：

10.1016/S1251-8050(00)00201-9

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Zircons from the Blond leucogranite (NW Limousin, French Massif Central) have been dated by U/Pb isotope analysis on the CAMECA IMS 1270 ion-probe facility at CRPG-CNRS. The obtained age of 319 +/- 7 Ma, different from previous Rb/Sr whole rock isochron age determination (301 +/- 5 Ma), integrates this granite in the Late Hercynian history of the Limousin, together with other Namuro-Westphalian granitoids. U/Pb isotope ion-probe analysis of zircons appears to be a particularly useful method for dating relatively recent highly fractionated granites. (C) 2000 Academie des sciences / Editions scientifiques et medicales Elsevier SAS.

引用

页码：617 / 622

页数：6

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