@article{fdi:010071941,
  title = {{D}eciphering landscape evolution with karstic networks : a {P}yrenean case study [+ {C}orrigendum in {Q}uater. {G}eochronol. 2020, vol. 57, art. 101050, 2 p.]},
  author = {{S}artegou, {A}. and {B}ourles, {D}. {L}. and {B}lard, {P}. {H}. and {B}raucher, {R}. and {T}ibari, {B}. and {Z}immermann, {L}. and {L}eanni, {L}aetitia and {A}umaitre, {G}. and {K}eddadouche, {K}. and {ASTER} {T}eam,},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he rates and chronologies of valley incision are closely modulated by the tectonic uplift of active mountain ranges and were controlled by repeated climate changes during the {Q}uaternary. {T}he continental collision between the {I}berian and {E}urasian plates induced a double-vergence orogen, the {P}yrenees, which has been considered a mature mountain range despite significant seismicity and evidence of neotectonics. {N}evertheless, recent studies indicated that the range may have never reached a steady state. {O}ne option for resolving this controversy is to quantify the incision rates since the {M}iocene by reconstructing the vertical movement of geometric markers such as fluvial terraces. {H}owever, the few available ages for the {P}yrenean terrace systems do not exceed the {M}iddle {P}leistocene. {T}hus, we study alluvium-filled horizontal epiphreatic passages in limestone karstic networks to increase the span of this dataset. {S}uch landforms are used as substitutes of fluvial terraces because they represent former valley floors. {T}hese features record the transient position of former local base levels during the process of valley deepening. {T}he {T}et river valley (southern {P}yrenees) is studied near the {V}illefranche-de-{C}onflent limestone gorge, where 8 cave levels have been recognized over a vertical height of 600 m. {I}n this setting, already published {A}l-26/{B}e-10 cosmogenic burial data were limited to the last similar to 5 {M}a. {T}his work extends this initial dataset through the acquisition of cosmogenic {B}e-10/{N}e-21 data, which should enable us to reconstruct a more complete valley incision chronology. {W}e also revise the {A}l-26/{B}e-10 record for the lowest portion of the valley. {T}he obtained quantitative results are surprising relative to certain geological evidence, and the limitations of such an approach in the investigated geodynamic context are discussed. {I}n particular, sampling within a detrital deposit (the {E}scaro {F}ormation) and in the riverbeds suggests that the {A}l-26/{B}e-10 ratios that are associated with the lower cave levels could have been inherited by pre-burial episodes. {S}imilarly, pre-burial catchment denudation rates that do not exceed hundreds of cm/ka are probably tainted by the same amalgamation processes.},
  keywords = {{C}ave deposits ; {C}osmogenic burial dating ; {A}l-26 ; {B}e-10 ; {N}e-21 ; {I}ncision rates ; {P}yrenees ; {FRANCE} ; {PYRENEES}},
  booktitle = {},
  journal = {{Q}uaternary {G}eochronology},
  volume = {43},
  numero = {},
  pages = {12--29 [+ {C}orrigendum in {Q}uater. {G}eochronol. 2020, vol. 57, art. 101050, 2 p.]},
  ISSN = {1871-1014},
  year = {2018},
  DOI = {10.1016/j.quageo.2017.09.005},
  URL = {https://www.documentation.ird.fr/hor/fdi:010071941},
}