331 +/- 9 Ma emplacement age of the Soultz monzogranite (Rhine Graben basement) by U/Pb ion-probe zircon dating of samples from 5 km depth

Authors
Alexandrov, P Royer, JJ Deloule, E
Citation
P. Alexandrov et al., 331 +/- 9 Ma emplacement age of the Soultz monzogranite (Rhine Graben basement) by U/Pb ion-probe zircon dating of samples from 5 km depth, CR AC S IIA, 332(12), 2001, pp. 747-754
Citations number
21
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
12
Year of publication
2001
Pages
747 - 754
Database
ISI
SICI code
1251-8050(20010630)332:12<747:3+9MEA>2.0.ZU;2-Y
Abstract
Drilling at Soultz-sous-Forets, France, conducted as part of the European ' Hot Dry Rock' Project, penetrated the Rhine Graben basement down to 5 090 m and revealed a porphyritic monzogranite. Chemical composition and REE patt erns of three samples at 5 km depth indicate homogeneous composition with a slight vertical differentiation, suggesting stable P-T conditions after th e magma emplacement. U/Pb ion-probe zircon dating provides an emplacement a ge at 331 +/- 9 Ma. This age is in agreement with those of the other intrus ive granitoids in this part of the Variscan segment, indicating a period of intensive magmatic activity around 330 Ma. (C) 2001 Academie des sciences / Editions scientifiques et medicales Elsevier SAS.