@article{fdi:010078981,
  title = {{T}he eruptive chronology of the {Y}ucamane-{C}alientes compound volcano : a potentially active edifice of the {C}entral {A}ndes (southern {P}eru)},
  author = {{R}ivera, {M}. and {S}amaniego, {P}ablo and {V}ela, {J}. and {L}e {P}ennec, {J}ean-{L}uc and {G}uillou, {H}. and {P}aquette, {J}. {L}. and {L}iorzou, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e reconstruct the eruptive chronology of the {Y}ucamane-{C}alientes compound volcano in southern {P}eru based on extensive fieldwork and a large dataset of geochronological ({K}-{A}r, {A}r-40/{A}r-39, {U}-{P}b, and {C}-14) and geochemical (major and trace element) analyses. {T}his compound volcano is composed of two edifices that have experienced discontinuous volcanic activity from the middle {P}leistocene to the {H}olocene. {T}he {C}alientes volcano has been constructed in four successive stages: {C}alientes {I} is composed of andesitic lava flows dated at similar to 500 ka. {S}ubsequently, the {C}allazas ignimbrite ({C}alientesll stage) was emplaced similar to 160-190 ka, followed by the main cone-building stage ({C}alientes {I}ll) at similar to 130-100 ka. {F}inally, the {H}olocene {C}alientes domes were emplaced and represent the last eruptive products of this edifice. {T}he {Y}ucamane volcano has been constructed in three stages: {Y}ucamane {I} consists of a succession of andesitic lava flows exposed at the base of the volcano that are older than 40 ka {Y}ucamane {II} (similar to 36-30 ka) comprises a thick sequence of block-and-ash-flow deposits that represents an episode of dome growth predating the younger {Y}ucamane cone ({Y}ucamane built alter 20-25 ka {D}uring the {H}olocene, {Y}ucamane vulcanian to sub-{P}linian activity has emplaced tephra-fall and pyroclastic-density-current deposits. {T}he most recent explosive eruptions occurred ca. 3000 {BP} and emplaced a tephra-fall and pumice-flow deposits. {M}ost samples from {C}alientes volcano are andesites and dacites (60.1-67.7 wt% {S}i{O}2), while rocks from {Y}ucamane volcano are basaltic-andesites to dacites (53.4-66.9 wt% {S}i{O}2). {T}he rocks have a mineral assemblage of plagioclase, amphibole, biotite, orthopyroxene, clinopyroxene, olivine, and {F}e-{T}i oxides. {T}he analyzed samples are categorized within a high-{K}, talc-alkaline series. {C}alientes volcano erupted mostly andesitic magmas, but its history is punctuated by rare eruptions of silica-rich magmas. {I}n contrast, {Y}ucamane volcano follows a different trend characterized by a gradual decrease in silica content through post-glacial time, from the large ({VEI} 3) sub-{P}linian andesitic eruption of similar to 3 ka to moderate ({VEI} <= 2) vulcanian eruptions of basaltic-andesitic. {O}n the basis of such recurrent and recent ({H}olocene), low-to-moderate explosive activity, {Y}ucamane must be considered an active and potentially threatening volcano, which may affect the province of {C}andarave with similar to 8000 inhabitants.},
  keywords = {{C}alientes ; {Y}ucamane ; {C}entral {A}ndes ; {H}olocene ; {E}ruptive chronology ; {V}olcanic hazards ; {PEROU} ; {ANDES} ; {YUCAMANE} {VOLCAN} ; {CALIENTES} {VOLCAN}},
  booktitle = {},
  journal = {{J}ournal of {V}olcanology and {G}eothermal {R}esearch},
  volume = {393},
  numero = {},
  pages = {art. 106787 [20 p.]},
  ISSN = {0377-0273},
  year = {2020},
  DOI = {10.1016/j.jvolgeores.2020.106787},
  URL = {https://www.documentation.ird.fr/hor/fdi:010078981},
}