@article{fdi:010068335,
  title = {{C}onstraints on the source of resurgent doming inferred from analogue and numerical modeling : implications on the current feeding system of the {Y}enkahe dome-{Y}asur volcano complex ({V}anuatu)},
  author = {{B}rothelande, {E}. and {P}eltier, {A}. and {G}ot, {J}. {L}. and {M}erle, {O}. and {L}ardy, {M}ichel and {G}araebiti, {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{R}esurgence, defined as the post-collapse long-term uplift of a caldera floor, is commonly attributed to a renewed rise of magma. {T}he {Y}enkahe dome ({V}anuatu) exhibits a common morphology - elongated with a graben on top - among resurgent domes, and is also one of the most active structures of the kind. {I}n this study, we performed a joint analysis based on analogue and finite element numerical models to (1) constrain the width and depth of the long-term deformation intrusive source of the {Y}enkahe dome and (2) discuss the close association between the {Y}enkahe dome and the active {Y}asur cone. {W}e consider the resurgent deformation at the surface to be driven by the uplift of a magma reservoir roof in depth. {A}s the edifice deformation response depends on the medium and the source properties, the mechanical behavior of the upper crust and the nature of the source are modeled using two very different sets of hypotheses. {A}nalogue modeling uses silicone putty, an analogue for a large viscous magma body, intruding a sand-plaster mixture reproducing a {M}ohr-{C}oulomb behavior for the crust. {N}umerical models consider the vertical displacement of a rigid indenter, allowing the conservation of a flat-shaped roof, into an elastoplastic material. {N}umerical and analogue models show different resurgent dome structures at depth but similar dome and graben morphologies in the surface. {I}nverse faults - or equivalent shearing zones - delimiting the dome provide an explanation for the confined nature of resurgent doming and the persistent volcanic activity on the dome border represented by the {Y}asur volcano. {A}nalogue and numerical models together provide an estimation range of 1-1.8 km for the intrusive deformation source depth, and 1.3-2 km for its width. {T}he proposed association between the {Y}enkahe dome and the {Y}asur volcano is compatible with such a shallow depth of the magma reservoir, and argues for a discontinuous resurgence process.},
  keywords = {{C}aldera ; {R}esurgent dome ; {A}nalogue modeling ; {N}umerical modeling ; {V}olcano deformation ; {V}anuatu ; {VANUATU} ; {YASUR} {VOLCAN}},
  booktitle = {{U}nderstanding volcanoes in the {V}anuatu arc},
  journal = {{J}ournal of {V}olcanology and {G}eothermal {R}esearch},
  volume = {322},
  numero = {{N}o {S}p{\'e}cial},
  pages = {225--240},
  ISSN = {0377-0273},
  year = {2016},
  DOI = {10.1016/j.jvolgeores.2015.11.023},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068335},
}