C. Caron et J. Lancelot, U-PH AND RB-SR DATING AT 390 MA OF THE PE YROLLES ORTHOGNEISS (CEVENNES, MASSIF-CENTRAL) - GEODYNAMIC IMPLICATIONS, Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes, 323(4), 1996, pp. 305-312
The Peyrolles orthogneiss (Cevennes) records a U-Pb zircon-apatite age
of 382 +/- 16 Ma and a Rb-Sr whole-rock age of 392 +/- 15 Ma. These c
oncordant ages refer to the emplacement of the Peyrolles magmatic prot
olith that occurred 40 Ma before the Variscan tectonometamorphic event
in the Cevennes.