@article{fdi:010061242,
  title = {{L}ate {P}aleozoic to {J}urassic chronostratigraphy of coastal southern {P}eru : temporal evolution of sedimentation along an active margin},
  author = {{B}oekhout, {F}. and {S}emp{\'e}r{\'e}, {T}hierry and {S}pikings, {R}. and {S}chaltegger, {U}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e present an integrated geochronological and sedimentological study that significantly revises the basin and magmatic history associated with lithospheric thinning in southern coastal {P}eru (15-18 degrees {S}) since the onset of subduction at similar to 530 {M}a. {U}ntil now, estimating the age of the sedimentary and volcanic rocks has heavily relied on paleontologic determinations. {O}ur new geochronological data, combined with numerous field observations, provide the first robust constraints on their chronostratigraphy, which is discussed in the light of biostratigraphical attributions. {A} detailed review of the existing local units simplifies the current stratigraphic nomenclature and clarifies its absolute chronology using zircon {U}-{P}b ages. {W}e observe that the {L}ate {P}aleozoic to {J}urassic stratigraphy of coastal southern {P}eru consists of two first-order units, namely (1) the {Y}amayo {G}roup, a sedimentary succession of variable (0-2 km) thickness, with apparently. no nearby volcanic lateral equivalent, and (2) the overlying {Y}ura {G}roup, consisting of a lower, 1-6 km-thick volcanic and volcaniclastic unit, the {C}hocolate {F}ormation, and an upper, 1-2 km-thick sedimentary succession that are in markedly diachronous contact across the coeval arc and back-arc. {W}e date the local base of the {C}hocolate {F}ormation, and thus of the {Y}ura {G}roup, to 216 {M}a, and show that the underlying {Y}amayo {G}roup spans a >110 {M}yr-long time interval, from at least the {L}ate {V}isean to the {L}ate {T}riassic, and is apparently devoid of significant internal discontinuities. {T}he age of the top of the {C}hocolate {F}ormation, i.e. of the volcanic arc pile, varies from similar to 194 {M}a to less than similar to 135 {M}a across the study area. {W}e suggest that this simplified and updated stratigraphic framework can be reliably used as a reference for future studies.},
  keywords = {{G}eochronology ; {P}eru ; {S}tratigraphy ; {M}agmatism ; {Z}ircon ; {PEROU}},
  booktitle = {},
  journal = {{J}ournal of {S}outh {A}merican {E}arth {S}ciences},
  volume = {47},
  numero = {},
  pages = {179--200},
  ISSN = {0895-9811},
  year = {2013},
  DOI = {10.1016/j.jsames.2013.07.003},
  URL = {https://www.documentation.ird.fr/hor/fdi:010061242},
}