@article{fdi:010070986,
  title = {{A} 30 {M}a history of the {A}mazon {R}iver inferred from terrigenous sediments and organic matter on the {C}eara {R}ise},
  author = {van {S}oelen, {E}. {E}. and {K}im, {J}. {H}. and {V}entura {S}antos,{R}. and {D}antas, {E}. {L}. and {V}asconcelos de {A}lmeida, {F}. and {P}inheiro {P}ires, {J}. and {R}oddaz, {M}artin and {S}inninghe {D}amst{\'e}, {J}. {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he history of the {A}mazon {R}iver is a much-discussed subject, and the timing of the development of a transcontinental system in particular is a matter of some controversy, with estimations varying between the {E}arly {M}iocene and the {P}liocene or even the {P}leistocene. {T}o shed further light on this, we studied the sediment provenance of an {O}ligocene to {L}ate {P}leistocene marine sedimentary section from the {C}eara {R}ise ({ODP} {S}ite 925), a topographic high in the central {A}tlantic {O}cean, using major element concentrations and {N}d isotopic composition in 85 samples. {I}n addition, the carbon isotopic composition of bulk organic matter and changes in the distribution of glycerol dialkyl glycerol tetraethers ({GDGT}s) were used to identify periods of increased river outflow. {O}n the basis of these results, we suggest that the history of the development of the {A}mazon {R}iver is characterized by specific steps. {D}uring the late {O}ligocene/{E}arly {M}iocene (30-18.3 {M}a), the terrigenous mass accumulation rates ({TAR}s) were high, and sediment and {GDGT} compositions suggest that a large river system existed, which at times received weathering products from a younger and probably {A}ndean sediment source. {A} shift to a younger {A}ndean sediment provenance after 8.7 {M}a indicates that the {A}mazon {R}iver became permanently connected with the {A}ndes. {B}etween 18.3 and 4.5 {M}a, {TAR}s were generally low, and {GDGT}s were derived for the most part from in situ production in marine waters. {A}round 4.5 {M}a, the river expanded, probably due to ongoing tectonic activity, and uplift in the {A}ndes increased {A}ndean rock erosion. {T}his led to a strong increase in terrigenous sediment deposition and enhanced organic matter preservation on the {C}eara {R}ise, and the delivery of terrestrial (both soil and riverine) branched {GDGT}s to the {C}eara {R}ise.},
  keywords = {{C}eara {R}ise ; {A}mazon ; {N}d isotopes ; {GDGT} ; {AMAZONE} {BASSIN} ; {ATLANTIQUE} {OUEST} ; {BRESIL} ; {PEROU} ; {COLOMBIE} ; {ZONE} {EQUATORIALE}},
  booktitle = {},
  journal = {{E}arth and {P}lanetary {S}cience {L}etters},
  volume = {474},
  numero = {},
  pages = {40--48},
  ISSN = {0012-821{X}},
  year = {2017},
  DOI = {10.1016/j.epsl.2017.06.025},
  URL = {https://www.documentation.ird.fr/hor/fdi:010070986},
}