s'authentifier
version française rss feed
HAL : in2p3-00538531, version 1

Fiche détaillée  Récupérer au format
Comptes Rendus Géosciences 342 (2010) 847-854
The ultimate summit eruption of Puy de Dôme volcano (Chaine des Puys, French Massif Central) about 10,700 years ago
D. Miallier1, Pierre Boivin2, C. Deniel2, A. Gourgaud2, P. Lanos3, M. Sforna2, Thierry Pilleyre1
(2010)

The Puy de Dôme volcano is a trachytic lava dome, about 11,000 y old. New pyroclastic layers originating from the volcano itself were discovered covering the summit and the flanks of the volcano. These pyroclastic layers do not fit with the previous interpretation, assuming a non-explosive dome-forming eruption. The tephra display pyroclastic surge features and exhibit fresh trachytic lapilli, basement lithics, allogeneous basaltic lava and clinker fragments requiring an open vent eruption. This ultimate eruption occurred after a period of rest, long enough for vegetation to develop on the volcano, as evidenced by carbonized plant fragments. Radiocarbon dating of some of these fragments gave an age of c.10,700 y also suggesting a significant rest duration.
1 :  LPC-CLERMONT - Laboratoire de Physique Corpusculaire de Clermont-Ferrand
2 :  LMV - Laboratoire Magmas et Volcans
3 :  IRAMAT - Institut de Recherches sur les Archéomatériaux
Physique/Physique/Géophysique

Planète et Univers/Sciences de la Terre/Géophysique

Sciences de l'environnement/Milieux et Changements globaux
Puy de Dôme – Cumulo-dôme – Trachyte – Cratère – France