@article{fdi:010069254,
  title = {{P}hysical properties of muddy sediments from {F}rench {G}uiana},
  author = {{C}aillaud, {J}. and {L}esourd, {L}. and {P}hilippe, {S}. and {G}ontharet, {S}. and {S}arrazin, {M}ax and {G}ardel, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {N}orth {W}est migration of long and discontinuous mud banks along the {F}rench {G}uiana coast has been extensively studied during the past years, in particular with a large-scale vision, which consequently has integrated morpho and hydrodynamic data. {T}he aims of the present paper were to use intrinsic sediment properties (grain-size, mineralogy, concentration, and cohesion) to (1) highlight the sedimentary conditions during the consolidation processes from fluid deposit to vegetation development, and (2) verify the apparent homogeneously derived sedimentary facies. {T}wo intertidal transects, {M}acouria and {C}ayenne, were compared from the coast to offshore. {T}heir altitude averages of 1 m and 2.8 m above mean sea level, respectively, were different enough to compare the influence of,the hydrodynamic impact and emersion time on their sediment properties. {T}he latter, i.e. grain size distribution, mineralogical content, mud concentration, and shear strength (cohesion), were determined from sampled surface sediments (first cm) and along sediment cores (20-30 cm depth) from each transect. {A} specific {X}-ray technique was applied to the whole core to differentiate clearly its thin layers. {O}n both intertidal sites, the grain size dominated by the fine silt fraction (2-20 mu m) and the bulk mineralogy characterized by five major minerals (quartz, feldspars, chlorite, illite, and kaolinite) appeared homogeneous along both transects and cores. {I}n spite of this apparent uniformity of particle size and mineralogical parameters, as well as for visual observation along the core, high precision {X}-rays still showed a cyclic sedimentation at a micro-scale level. {T}his cyclicity with intercalation of fine layers was related to distinct dynamic deposits marked by both tidal processes and hydrodynamic factors (swell propagation). {T}he cohesion and concentration results were dependent on the topography, where high topography was characterized by sediments with high cohesion and concentration values, and vice versa. {A} comparison between these two parameters was done to define critical limits between soft and stiff muds, as well as unvegetated and colonized muds. {T}he favorable intrinsic sedimentary properties for consolidation and colonization were also discussed according to the field observations and bibliographic data.},
  keywords = {{F}rench {G}uiana ; {S}edimentary fades ; {C}oncentration ; {C}ohesion ; {M}ineralogy ; {GUYANE} {FRANCAISE}},
  booktitle = {},
  journal = {{J}ournal of {S}outh {A}merican {E}arth {S}ciences},
  volume = {73},
  numero = {},
  pages = {22--32},
  ISSN = {0895-9811},
  year = {2017},
  DOI = {10.1016/j.jsames.2016.11.006},
  URL = {https://www.documentation.ird.fr/hor/fdi:010069254},
}