@article{fdi:010091274,
  title = {{B}lossoming of the {P}leistocene volcanism in the {E}cuadorian {A}ndes : a review based on new and recent geochronological data},
  author = {{S}antamaría, {S}. and {B}ablon, {M}. and {Q}uidelleur, {X}. and {S}amaniego, {P}ablo and {L}e {P}ennec, {J}ean-{L}uc and {H}idalgo, {S}. and {L}iorzou, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {E}cuadorian arc is composed of an unusually high number of volcanoes, organized as along-arc alignments and across-arc clusters, in a relatively small area. {A}lthough several geochronological studies have been carried out in the last three decades, the eruptive history of the central zone of the arc remains poorly documented, preventing analysis of the initiation of volcanism of the whole arc. {I}n this study, we present new {K}-{A}r ages obtained from this central area, referred to as the {Q}uito segment. {T}hese results were then incorporated into an updated comprehensive geochronological database of about 250 ages, allowing us to describe, at the arc scale, the spatial and temporal evolution of {Q}uaternary volcanism in {E}cuador. {A}bout eighty {Q}uaternary volcanoes have been identified in the {E}cuadorian {A}ndes, 45 of which have been radioisotopically dated and/or identified as active or potentially active. {T}he volcanic arc developed in three stages, characterized by an increase in the total number of active volcanoes. {D}uring the oldest {P}lio-{E}arly {P}leistocene stage, documented volcanic activity was mostly concentrated in the {E}astern {C}ordillera of the {Q}uito segment, with minor effusive eruptions in the southern {B}ack-{A}rc. {S}ince similar to 1.4 {M}a, activity has spread to the surroundings of the {Q}uito segment, and new edifices also appeared in the {W}estern {C}ordillera and the {I}nter-{A}ndean {V}alley. {T}owards the end of this intermediate stage (i.e., similar to 800 ka), volcanism occurred in isolated areas north and south of the {I}nter-{A}ndean {V}alley. {F}inally, the late and current has been characterized by a remarkable increase in volcanic activity since similar to 600 ka. {A}bout 50 volcanoes were active during this stage. {T}he spatial distribution of the {E}cuadorian arc volcanism seems to be guided by deep mechanisms (i.e., slab geometry and age, amount and composition (fluids and melts) of slab input, mantle heterogeneities) and old crustal tectonic structures of the {W}estern {C}ordillera, while neotectonics seems to influence the development of stratovolcanoes. {I}n addition, we note that the spatial and temporal evolution of volcanism highlights the influence of the {C}arnegie {R}idge and the young {N}azca crust on the thermal regime of the subduction system, which in turn increases of volcanic activity in {E}cuador.},
  keywords = {{V}olcanic arc ; {E}cuador ; {K}-{A}r dating ; {G}eodynamics ; {C}arnegie {R}idge ; {EQUATEUR} ; {ANDES}},
  booktitle = {},
  journal = {{B}ulletin of {V}olcanology},
  volume = {86},
  numero = {9},
  pages = {80 [30 ]},
  ISSN = {0258-8900},
  year = {2024},
  DOI = {10.1007/s00445-024-01767-z},
  URL = {https://www.documentation.ird.fr/hor/fdi:010091274},
}