@article{fdi:010075297,
  title = {{T}he influence of bottom currents on the {Z}ambezi {V}alley morphology ({M}ozambique {C}hannel, {SW} {I}ndian {O}cean) : in situ current observations and hydrodynamic modelling},
  author = {{M}iramontes, {E}. and {P}enven, {P}ierrick and {F}ierens, {R}. and {D}roz, {L}. and {T}oucanne, {S}. and {J}orry, {S}. {J}. and {J}ouet, {G}. and {P}astor, {L}. and {J}acinto, {R}. {S}. and {G}aihot, {A}. and {G}iraudeau, {J}. and {R}aisson, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}ixed turbidite-contourite systems can be found in oceans where bottom currents and turbidity currents interact. {T}he {Z}ambezi turbidite system, located in the {M}ozambique {C}hannel ({SW} {I}ndian {O}cean), is one of the largest sedimentary systems in the world in length and area of the related catchments. {T}he oceanic circulation in the {M}ozambique {C}hannel is intense and complex, dominated by eddies flowing southwards and deep currents flowing northwards along the {M}ozambican margin. {C}urrent measurements obtained from moorings at 3400-4050 m water depth in the {Z}ambezi and {T}siribihina valleys show periods of intense currents at the seafloor with peaks of 40-50 cm s(-1) that last up to one month and are not related to turbidity currents. {T}hese strong bottom-current events are correlated with a change in current direction and an increase in temperature. {T}he periods of current intensification may be related to eddies, since they present similar frequencies (around 7 per year). {M}oreover, modelling results show that during periods of intense deep circulation an anticyclonic eddy is present between the {M}ozambican slope and the centre of the {M}ozambique {C}hannel, which may block the northward transport of the deep water mass and thus enhance the southward transport along the western slope of {M}adagascar. {A}ccording to our hydrodynamic modelling of the circulation near the seafloor, intense currents are often present along the {Z}ambezi {V}alley, especially along the valley flanks. {M}ulti-channel seismic reflection data show that the {Z}ambezi turbidite system does not show the typical characteristics of turbidite systems, being dominated by erosional processes, which mainly affect the valley flanks. {L}evees associated with the valley are absent in the main axis of the system. {T}he effect of bottom currents on sedimentation in the basin is evidenced by the low sedimentation rates that witness winnowing in the basin, the presence of contouritic sand in the {Z}ambezi {V}alley flanks and the abundance of current-related bedforms observed in multibeam bathymetry and seismic data. {T}he intense oceanic processes observed in the {M}ozambique {C}hannel may transport a large part of the fine sediment out of the basin and erode the seafloor even at great depths. {T}herefore, the {Z}ambezi turbidite system could at present be considered as a mixed turbidite-contourite system, with important implications for source-to sink studies.},
  keywords = {{C}ontourite ; {T}urbidity current ; {M}ixed system ; {O}ceanic circulation ; {M}ooring ; {ADCP} ; {ROMS} model ; {B}edform ; {OCEAN} {INDIEN} ; {MOZAMBIQUE} {CANAL}},
  booktitle = {},
  journal = {{M}arine {G}eology},
  volume = {410},
  numero = {},
  pages = {42--55},
  ISSN = {0025-3227},
  year = {2019},
  DOI = {10.1016/j.margeo.2019.01.002},
  URL = {https://www.documentation.ird.fr/hor/fdi:010075297},
}