@article{fdi:010082262,
  title = {{T}he {T}utupaca volcanic complex ({S}outhern {P}eru) : eruptive chronology and successive destabilization of a dacitic dome complex},
  author = {{M}arino, {J}. and {S}amaniego, {P}ablo and {M}anrique, {N}. and {V}alderrama, {P}. and {R}oche, {O}livier and de {V}ries, {B}. {V}. and {G}uillou, {H}. and {Z}erathe, {S}wann and {A}rias, {C}. and {L}iorzou, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}everal processes have been proposed as triggering mechanisms for the large sector collapses that affect most volcanoes, and which may occur several times in the volcano's lifetime. {H}ere we present and discuss the case of {T}utupaca volcano, located in southern {P}eru and part of the {C}entral {V}olcanic {Z}one of the {A}ndes. {T}utupaca is composed of an old, hydrothermally altered and highly eroded {B}asal edifice, as well as younger twin peaks located in the northern part of the complex (the {W}estern and {E}astern {T}utupaca). {T}he youngest {E}astern edifice of {T}utupaca is composed of at least seven coalescing lava domes and associated deposits, including block-and-ash flow and debris avalanche deposits. {W}e identified two debris avalanche deposits. {A}n older unit ({A}zufre debris avalanche deposit) was channeled in the valleys located to the {E} and {SE} of the basal volcano, reaching up to 3.5 km from its source region. {F}our cosmogenic nuclide exposure dates (10{B}e/feldspar) were obtained from boulders of this debris avalanche deposit and ranged between 6.0 +/- 0.7 and 7.8 +/- 1.5 ka. {T}he younger unit ({P}aipatja deposit) was associated with the sector collapse of the edifice reconstructed just after the first debris avalanche (domes {IV} to {VIII}). {T}he sector collapse produced a debris avalanche deposit that outcrops immediately to the {NE} of the amphitheater and was associated with a large pyroclastic density current deposit that was previously dated by radiocarbon at 218 +/- 14 a {BP} ({S}amaniego et al., 2015). {B}oth debris avalanche deposits have two contrasting sub-units: (1) the main subunit, hereafter called hydrothermal-altered debris avalanche deposit, is a whitishyellow volcanic breccia with heterolithic and heterometric blocks, which originated from the {B}asal edifice, and (2) a dome-rich debris avalanche deposit, composed by non-altered dome blocks from {E}astern {T}utupaca. {I}n proximal areas, the dome-rich unit overlaps the hydrothermally-altered unit while in distal areas, these two units are mixed forming a hummocky and/or ridged topography. {I}n addition to the similarity of both debris avalanches, we propose that the triggering mechanism for these debris avalanches was similar. {T}he dacitic dome growth, coupled with a substrate of older, hydrothermally-altered rock, induced the destabilization of the edifice, producing the debris avalanches and the related pyroclastic density currents.},
  keywords = {{T}utupaca ; {C}entral {A}ndes ; {H}olocene ; {S}ector collapse ; {V}olcanic hazards ; {PEROU} ; {ANDES} ; {TUTUPACA} {VOLCAN}},
  booktitle = {},
  journal = {{J}ournal of {S}outh {A}merican {E}arth {S}ciences},
  volume = {109},
  numero = {},
  pages = {103227 [18 ]},
  ISSN = {0895-9811},
  year = {2021},
  DOI = {10.1016/j.jsames.2021.103227},
  URL = {https://www.documentation.ird.fr/hor/fdi:010082262},
}