@article{fdi:010048490,
  title = {{A} benthic {S}i mass balance on the {C}ongo margin: {O}rigin of the 4000 m {DS}i anomaly and implications for the transfer of {S}i from land to ocean},
  author = {{R}agueneau, {O}. and {R}egaudie-de-{G}ioux, {A}. and {M}oriceau, {B}. and {G}allinari, {M}. and {V}angriesheim, {A}. and {B}aurand, {F}ran{\c{c}}ois and {K}hripounoff, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}o elucidate the origin of the silicic acid ({DS}i) anomaly observed along the 4000 isobath on the {C}ongo margin, we have established a benthic {S}i mass balance and performed direct measurements of biogenic silica (b{S}i{O}(2)) dissolution in the deep waters and in the sediments. {R}esults strongly suggest that the anomaly originates from the sediments; the intensity of {DS}i recycling is consistent with the degradation of organic matter, as observed from {S}i:{O}-2 ratios in the benthic fluxes compared to that ratio observed in the anomalies. {S}trong imbalances, observed in both the {S}i and {C} mass balances, suggest that the biogenic matter that degrades and dissolves in these sediments near 4000 m does not come from pelagic sedimentation. {I}t is probably not coming also from the deep channel, because observations were similar in the deep channel vicinity (site {D}) and further south, far from its influence (site {C}). {T}he composition of the sediments, with an {S}i:{C} ratio close to that observed on continental shelves, suggests that this matter is coming from downslope transport. {A} first estimate of the magnitude of this flux at global scale, close to 12 {T} mol {S}i yr(-1), suggests that it may be an important path for transferring {S}i from land to ocean.},
  keywords = {{B}iogenic silica ; {D}issolution ; {P}reservation ; {C}ontinental margin ; {C}ongo},
  booktitle = {},
  journal = {{D}eep-{S}ea {R}esearch {P}art {II} -{T}opical {S}tudies in {O}ceanography},
  volume = {56},
  numero = {23},
  pages = {2197--2207},
  ISSN = {0967-0645},
  year = {2009},
  DOI = {10.1016/j.dsr2.2009.04.003},
  URL = {https://www.documentation.ird.fr/hor/fdi:010048490},
}