par Femenias, Olivier 
;Mercier, Jean-Claude ;Demaiffe, Daniel
Référence Comptes rendus de l'Académie des sciences. Série 2. Sciences de la terre et des planètes, 332, 9, page (535-542)
Publication Publié, 2001
;Mercier, Jean-Claude ;Demaiffe, Daniel Référence Comptes rendus de l'Académie des sciences. Série 2. Sciences de la terre et des planètes, 332, 9, page (535-542)
Publication Publié, 2001
Article révisé par les pairs
| Résumé : | Petrology of ultramafic xenoliths from the Puy Beaunit (French Massif Central): An unusual occurrence for the sub-continental mantle. The Puy Beaunit maar presents a large variety of mantle xenoliths (spinel peridotites, pyroxenites and layered rocks). A detailed study of the textures and mineral equilibria shows the unusual character of this occurrence and the local complexity of the upper mantle beneath the French Massif Central. Ultramafic nodules have a metamorphic, magmatic or 'pyrometamorphic origin; they display different stages of deformation, metasomatism, partial melting and fractional crystallisation. The upper mantle appears stratified (as in other regional occurrences of the area); it has been intruded by a differentiated magmatic complex. © 2001 Académie des sciences / Éditions scientifiques et médicales Elsevier SAS. |
