@article{fdi:010062012,
  title = {{C}ontrasting iron isotopic compositions in river suspended particulate matter : the {N}egro and the {A}mazon annual river cycles},
  author = {{P}inheiro, {G}. {M}. {D}. and {P}oitrasson, {F}. and {S}ondag, {F}rancis and {C}ochonneau, {G}{\'e}rard and {V}ieira, {L}. {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}ron isotopic compositions (delta {F}e-56({IRMM}-14)) of suspended particulate matter ({SPM}) from two major rivers in the {A}mazon {B}asin, the {A}mazon {R}iver itself (at the {O}bidos {S}tation) and the {N}egro {R}iver (at the {S}errinha {S}tation), were investigated in the present study. {T}he main objective was to search for temporal variations during their annual river cycles. delta {F}e-56({IRMM}-14) values for the {A}mazon {R}iver at {O}bidos range between 0.00 and +0.15 parts per thousand, indistinguishable from the average continental crust value. {I}n contrast, the iron isotopic compositions of the {N}egro {R}iver ({S}errinha {S}tation) {SPM} vary between -0.34 and -0.82 parts per thousand, whereas the dissolved matter is isotopically heavier in this river. {T}he lack of significant isotopic variations in the {A}mazon {R}iver indicates that one individual {SPM} subsurface sample is representative of the river during the whole annual river cycle, in opposition to results obtained for the {N}egro {R}iver. {T}he data suggest that in organic-poor white water rivers, such as the {A}mazon, iron isotopic signatures of the suspended fraction reflect a detrital crustal component with little isotopic fractionation. {O}n the other hand, in the organic-rich {N}egro {R}iver, which has tropical podzols as the main iron source, the iron redox cycling at the water-soil interface influences the iron isotopic composition.},
  keywords = {iron isotopes ; {A}mazon and {N}egro equatorial rivers ; temporal series ; annual river cycle ; water suspended particulate matter ; water dissolved matter ; {BRESIL} ; {AMAZONIE} ; {AMAZONE} {BASSIN} ; {RIO} {NEGRO}},
  booktitle = {},
  journal = {{E}arth and {P}lanetary {S}cience {L}etters},
  volume = {394},
  numero = {},
  pages = {168--178},
  ISSN = {0012-821{X}},
  year = {2014},
  DOI = {10.1016/j.epsl.2014.03.006},
  URL = {https://www.documentation.ird.fr/hor/fdi:010062012},
}