@article{PAR00003495,
  title = {{O}rigin of salts and brine evolution of bolivian and chilean salars},
  author = {{R}isacher, {F}ran{\c{c}}ois and {F}ritz, {B}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}entral {A}ndes in {B}olivia and northern {C}hile contain numerous internal drainage basins occupied by saline lakes and salt crusts (salars). {S}alts in inflow waters stem from two origins: alteration of volcanic rocks, which produces dilute waters, and brine recycling, which leads to brackish waters. {C}hilean alteration waters are three times more concentrated in average than {B}olivian waters, which is related to a higher sulfur content in {C}hilean volcanoes. {B}rackish inflows stem from brines which leak out from present salars and mix with dilute groundwater. {M}ost of the incoming salts are recycled salts. {T}he cycling process is likely to have begun when ancient salars were buried by volcanic eruptions. {T}hree major brine groups are found in {A}ndean salars: alkaline, sulfate-rich, and calcium-rich brines. {E}vaporation modeling of inflows shows good agreement between predicted and observed brines in {C}hile. {A}lkaline salars are completely lacking in {C}hile, which is accounted for by higher sulfate and lower alkalinity of inflow waters, in turn related to the suspected higher sulfur content in {C}hilean volcanic rocks. {S}ix {B}olivian salars are alkaline, a lower number than that predicted by evaporative modeling. {D}eposition on the drainage basin of eolian sulfur eroded from native deposits shifts the initial alkaline evolution to sulfate brines. {T}he occurrence of calcium-rich brines in {A}ndean salars is not compatible with volcanic drainage basins, which can only produce alkaline or sulfate-rich weathering waters. {T}he discrepancy is likely due to recycled calcic brines from ancient salars in sedimentary basins, now buried below volcanic formations. {C}alcic salars are not in equilibrium with their volcanic environment and may slowly change with time to sulfate-rich salars.},
  keywords = {{C}entral {A}ndes ; {C}losed basin ; {H}ydrochemistry ; {S}alar ; {B}rine ; {S}alt recycling ; {B}rine evolution},
  booktitle = {},
  journal = {{A}quatic {G}eochemistry},
  volume = {15},
  numero = {1-2},
  pages = {123--157},
  ISSN = {1380-6165},
  year = {2009},
  DOI = {10.1007/s10498-008-9056-x},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00003495},
}