@article{fdi:010068350,
  title = {{T}he 2009-2010 eruption of {G}aua volcano ({V}anuatu archipelago) : {E}ruptive dynamics and unsuspected strong halogens source},
  author = {{B}ani, {P}hilipson and {B}oudon, {G}. and {B}alcone-{B}oissard, {H}. and {D}elmelle, {P}. and {Q}uiniou, {T}. and {L}efevre, {J}{\'e}r{\^o}me and {B}ule, {E}. {G}. and {H}iroshi, {S}. and {L}ardy, {M}ichel},
  editor = {},
  language = {{ENG}},
  abstract = {{G}aua, a little known volcano in the northern part of {V}anuatu archipelago, went through a long term eruptive activity between {S}eptember 2009 and {J}uly 2010. {T}he eruption started by a phreatic to phreatomagmatic activity which progressively shifted into a magmatic discharge. {T}he first eruptive phase involved the hydrothermal system in place. {T}he latter was likely influenced by seawater seepage, leading to the formation of anhydrite. {M}agma involved hereafter this opening phase is of basaltic andesite and basaltic trachyandesite composition (high {K} calcalkaline series), typical of the northern part of the {V}anuatu archipelago. {T}he 2009-2010 activity discharged at least 184 kt of {SO}2 and a significant amount of halogens (72 kt {C}l and 217 kt {F}). {S}uch halogen releases indicate that {G}aua is a strong source of halogens into the atmosphere. {H}igh and sustained amount of {F} discharges are known to induce health issues and should not be ignored on {G}aua island. {D}uring this eruption the quiescent and voluminous {L}ake {L}etas was slightly affected by the eruption. {N}evertheless the hydrothermal discharge point into the lake, situated on the southeastern part of {M}t. {G}aret appeared to be relatively active. {A}t this particular location rock forming elements, leached out from volcanic rock by add fluids released by the new intrusion of magma, were discharged along with anions into {L}ake {L}etas. {T}his release has triggered localized chemistry changes in the lake. {W}e speculate that this discharge has also disturbed the bottom water in a limited perimeter, remobilizing reduced {F}e to the surface and subsequently triggering the change in the water color by {F}e oxidation.},
  keywords = {{G}aua volcano ; {E}ruption dynamic ; {S}trong halogens source ; {VANUATU} ; {GAUA} {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 = {63--75},
  ISSN = {0377-0273},
  year = {2016},
  DOI = {10.1016/j.jvolgeores.2015.06.023},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068350},
}