Etude géophysique de la structure interne d'un dôme volcanique : le Puy de Dôme et son environnement (Chaîne des Puys, France)

A groundbreaking geophysical study of the Puy de Dôme, a 11,000-year-old trachytic lava dome in France's Chaîne des Puys, reveals its complex internal structure and growth dynamics. The research, combining high-resolution Digital Terrain Modeling (DTM) with Electrical Resistivity Tomography (ERT), gravity, and magnetism, uncovered previously unknown features: a cluster of preexisting strombolian volcanoes beneath the dome, a massive central core surrounded by collapse breccia, and evidence of hydrothermal alteration at its summit. Additionally, intrusions beneath neighboring volcanic edifices were identified, suggesting intricate emplacement processes. This study provides new constraints on the dome's evolution and the mechanisms driving deformations in its vicinity.

Portal, A. Etude géophysique de la structure interne d’un dôme volcanique : le Puy de Dôme et son environnement (Chaîne des Puys, France). https://doi.org/10.70675/f7f8139dz032ez4a02zbd26z836c4a9c0cc8