@article{PAR00019578,
  title = {{P}rovenance of the neogene sediments from the {S}olimoes formation ({S}olimoes and {A}cre basins), {B}razil},
  author = {{H}orbe, {A}. {M}. {C}. and {R}oddaz, {M}artin and {G}omes, {L}. {B}. and {C}astro, {R}. {T}. and {D}antas, {E}. {L}. and do {C}armo, {D}. {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study investigates the provenance of middle-late {M}iocene to {P}liocene sediments of the {S}olimoes {F}ormation, in western {B}razilian {A}mazonia, to complement the geological history and fill the gap left by similar studies on other foreland basin deposits and in the {A}mazonian fan. {T}he major and trace element concentrations and {S}r {N}d isotopic compositions of sixteen samples from the 1{AS} 33{AM} borehole and fifteen samples from two sections outcropping in the {A}cre and {Y}aco rivers were measured for determining their provenance. {A}dditionally, the heavy mineral assemblages of the sixteen borehole samples were determined to complement the geochemical provenance interpretation of the borehole sediments. {T}he {N}d isotopic compositions of the {S}olimoes {F}ormation indicate that the {A}ndes was the principal source of these {N}eogene sediments. {W}hile the middle-late {M}iocene borehole sediments are dominated by stable assemblage (zircon, tourmaline, and rutile) and less radiogenic {N}d isotopic values, the {P}liocene borehole sediments have a larger amount of more unstable mineral assemblages (epidote, pyroxene, and amphibole) and more radiogenic {N}d isotopic values. {T}hese mineral and isotopic differences between the middle-late {M}iocene and {P}liocene sediments are interpreted to reflect a change in provenance with increasing contribution of metamorphic and young {N}d radiogenic source in the {P}liocene most probably related to the late {M}iocene uplift of the {P}eruvian {E}astern {C}ordillera. {T}hese changes that precede the paleoenvironmental changes highlighted by the palynological study of {L}eite et al. (2017) suggest that the {A}ndean tectonics drove the middle to late {M}iocene paleoenvironmental changes of the {A}mazon basin from the {P}ebas mega-wetland to the more fluvial {A}cre phase.},
  keywords = {{S}r-{N}d isotopes ; {H}eavy minerals ; {S}olimoes {F}ormation ; {A}ndes ; {A}mazonian ; retroarc foreland basins ; {BRESIL} ; {ANDES} ; {AMAZONIE} ; {SOLIMOES} {BASSIN} ; {ACRE} {BASSIN}},
  booktitle = {},
  journal = {{J}ournal of {S}outh {A}merican {E}arth {S}ciences},
  volume = {93},
  numero = {},
  pages = {232--241},
  ISSN = {0895-9811},
  year = {2019},
  DOI = {10.1016/j.jsames.2019.05.004},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00019578},
}