@article{fdi:010067742,
  title = {{U}nderstanding the link between circumferential dikes and eruptive fissures around calderas based on numerical and analog models},
  author = {{C}orbi, {F}. and {R}ivalta, {E}. and {P}inel, {V}irginie and {M}accaferri, {F}. and {A}cocella, {V}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}ctive calderas are seldom associated with circumferential eruptive fissures, but eroded magmatic complexes reveal widespread circumferential dikes. {T}his suggests that, while the conditions to emplace circumferential dikes are easily met, mechanisms must prevent them from reaching the surface. {W}e explain this discrepancy with experiments of air injection into gelatin shaped as a volcano with caldera. {A}nalog dikes show variable deflection, depending on the competition between overpressure, {P}-e, and topographic unloading, {P}-l; when {P}-l/{P}-e = 4.8-5.3, the dikes propagate orthogonal to the least compressive stress. {D}ue to the unloading, they become circumferential and stall below the caldera rim; buoyancy is fundamental for the further rise and circumferential fissure development. {N}umerical models quantitatively constrain the stress orientation within the gelatin, explaining the observed circumferential dikes. {O}ur results explain how dikes propagate below the rim of felsic and mafic calderas, but only in the latter they are prone to feed circumferential fissures.},
  keywords = {},
  booktitle = {},
  journal = {{G}eophysical {R}esearch {L}etters},
  volume = {43},
  numero = {12},
  pages = {6212--6219},
  ISSN = {0094-8276},
  year = {2016},
  DOI = {10.1002/2016gl068721},
  URL = {https://www.documentation.ird.fr/hor/fdi:010067742},
}