@article{fdi:010094992,
  title = {{O}ffshore record of explosive volcanic eruptions in the southern part of the {P}anamá {B}asin during the past 10 {M}yr : 2. {I}nferences about the construction of the {N}orthern {A}ndean arc and regional geodynamics},
  author = {{B}ablon, {M}athilde and {S}amaniego, {P}ablo and {L}e {P}ennec, {J}ean-{L}uc and {N}auret, {F}. and {M}ichaud, {F}. and {S}aillard, {M}arianne and {H}idalgo, {S}. and {D}evidal, {J}. {L}. and {O}range, {F}. and {L}iorzou, {C}. and {R}atzov, {G}.},
  editor = {},
  language = {{ENG}},
  abstract = {{V}olcanic material preserved in marine and lacustrine sediments is a key high-resolution archive for studying the past eruptive history of volcanic regions. {I}n this work, we use the geochemical and isotopic compositions of marine volcanic glass shards, the thicknesses, and age models of tephra layers preserved in the deep sediments of the eastern equatorial {P}acific, to study their volcanic source, the long-term evolution of volcanism, and its relationship with the regional geodynamics. {W}e highlight that explosive eruptions associated with the {G}alapagos hotspot occurred in the {L}ate {M}iocene and {E}arly {P}leistocene, which may reflect plume-ridge interplays. {W}e also show that the oldest products of the {N}orthern {A}ndean arc were deposited at similar to 4.8 {M}a, shortly before the extinction of volcanic activity in northern {P}eru-southern {E}cuador, due to the gradual flattening of the slab. {T}he eruptive activity, apparently restricted to the {E}astern {C}ordillera of {E}cuador during the {P}liocene, intensified and expanded from 2 {M}a, with products of more varied compositions reflecting the construction of stratovolcanoes. {T}his increase in volcanic activity, coeval with episodes of uplift of the {C}oastal {C}ordillera and with the development of the regional fault system that accommodates crustal deformations, may reflect the presence under the {E}cuadorian {A}ndes of the young {N}azca oceanic crust, which carries the {C}arnegie {R}idge. {F}inally, our results suggest that tephra of the {N}orthern {A}ndean arc recorded in sediments of the {P}anam & aacute; {B}asin were essentially emplaced by {P}linian eruptions of a {VEI}-5-6 ({V}olcanic {E}xplosivity {I}ndex), except one {VEI}-7 caldera-forming eruption, which occurred at 216 +/- 5 ka.},
  keywords = {tephrochronology ; geochemistry ; integrated ocean drilling program ; northern {A}ndean arc ; {G}alapagos ; major eruptions ; {EQUATEUR} ; {PACIFIQUE} ; {ANDES} ; {GALAPAGOS} ; {PANAMA} {BASSIN}},
  booktitle = {},
  journal = {{G}eochemistry {G}eophysics {G}eosystems},
  volume = {26},
  numero = {9},
  pages = {e2025{GC}012278 [33 p.]},
  year = {2025},
  DOI = {10.1029/2025gc012278},
  URL = {https://www.documentation.ird.fr/hor/fdi:010094992},
}