@article{fdi:010080560,
  title = {{E}volution of {R}etisol impacted by artificial drainage : what can we learn from stable {F}e isotope ratios ?},
  author = {{F}ekiacova, {Z}. and {M}ontagne, {D}. and {D}uvivier, {A}. and {G}uihou, {A}. and {D}eschamps, {P}ierre and {C}ornu, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}ron oxides are one of the most reactive mineral phases in soils. {A}s a consequence, their transformations can considerably affect the dynamics of the adsorbed elements and of the associated soil ecosystem services. {U}nderstanding the dynamics of {F}e oxides in soils is therefore a key issue for the evolution of soil and associated ecosystem services. {A} potentially powerful tool to study the transformations of {F}e-oxides in soil is stable {F}e isotopes. {H}owever, there are still important gaps in our knowledge of {F}e isotope fractionations. {I}n order to examine the {F}e isotope fractionations related to each process occurring in soils, we focused on a drainage-influenced sequence of {R}etisols, a soil type characterized by clay translocation and subsequent degradation by redox processes inducing a strong spatial {F}e segregation in contrasted soil volumes. {W}e combined the isotopic approach at the scale of a bulk horizon and at the scale of the different soil volumes, with mineralogical analyses and mass balance calculations in order to investigate the consequences of the drainage on {F}e isotope fractionation. {W}e showed that while there were no {F}e isotope fractionations at the profile scale, {F}e isotopic signatures varied significantly among soil volumes (delta {F}e-56 values from -0.49 +/- 0.05 to 0.29 +/- 0.06 parts per thousand). {T}hese variations suggest that redox processes are the main mechanisms responsible for the {F}e redistribution among the volumes, and particularly that {F}e accumulation during {M}n oxide precipitation makes a significant contribution to {F}e isotopic fractionation, during these {R}etisol differentiation. {I}n contrast, drainage-induced eluviation does not result in further {F}e isotope fractionations in soil volumes in these {R}etisols. {T}he isotopic signatures of the different mineral phases present in the volumes were calculated using the mass balance approach and suggest that the iron oxides (goethite, ferrihydrite) have delta {F}e-56 values close to 0 parts per thousand, while the clay minerals are enriched in heavy {F}e isotopes and the {M}n oxides in light {F}e isotopes. {T}his study provides insight into the dynamics of {F}e minerals in hydromorphic soils and offers a new perspective on stable {F}e isotope fractionation in soils.},
  keywords = {{F}e isotopes ; {R}edox processes ; {E}luviation ; {D}rainage ; {M}ineral ; {FRANCE} ; {YONNE} {PLATEAU}},
  booktitle = {},
  journal = {{G}eoderma},
  volume = {384},
  numero = {},
  pages = {114771 [9 ]},
  ISSN = {0016-7061},
  year = {2021},
  DOI = {10.1016/j.geoderma.2020.114771},
  URL = {https://www.documentation.ird.fr/hor/fdi:010080560},
}