%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Buono, G.
%A Maccaferri, F.
%A Pappalardo, L.
%A Tramelli, A.
%A Caliro, S.
%A Chiodini, G.
%A Pinel, Virginie
%A Rivalta, E.
%A Spagnuolo, E.
%A Trasatti, E.
%A Di Vito, M. A.
%T Weak crust owing past magmatic intrusions beneath Campi Flegrei identified : the engine for bradyseismic movements ?
%D 2025
%L fdi:010093347
%G ENG
%J AGU Advances
%K caldera unrest ; volcanic hazard ; Campi Flegrei
%K ITALIE
%M ISI:001459864000001
%N 2
%P e2024AV001611 [31 ]
%R 10.1029/2024av001611
%U https://www.documentation.ird.fr/hor/fdi:010093347
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2025-05/010093347.pdf
%V 6
%W Horizon (IRD)
%X Calderas often experience extended periods of unrest that are challenging to relate to a magmatic or hydrothermal origin, making it crucial to assemble a clear picture of these dynamics. Since 2005, Campi Flegrei caldera (Italy) has experienced accelerating ground uplift, seismicity rates, and degassing. Here we conduct petrological and 4D X-ray microtomography investigations on cored rocks from a similar to 3 km deep geothermal well located near the center of caldera, complemented by 3D high-resolution seismic tomography. At a depth of similar to 2.5-3.0 km we identify the transition to a weak tuff layer likely to trap magmatic fluids. Simulations of magma pathways indicate that stresses generated by caldera unloading may have arrested at the limestone/tuff transition past ascending dykes, which deformed, heated, and released magmatic fluids, deteriorating the surrounding rocks. This weak layer may play a crucial role in building up overpressure, causing deformation and seismicity, thus influencing the dynamics of recent unrests, and possible future magma ascent episodes.
%$ 064 ; 066