FN Archimer Export Format
PT J
TI Factors controlling the morphology and internal sediment architecture of moats and their associated contourite drifts
BT 
AF Wilckens, Henriette
   Schwenk, Tilmann
   Lüdmann, Thomas
   Betzler, Christian
   Zhang, Wenyan
   Chen, Jiayue
   Hernandez-Molina, F.Javier
   Lefebvre, Alice
   CATTANEO, Antonio
   Spiess, Volkhard
   Miramontes, Elda
AS 1:1,2;2:1;3:3;4:3;5:4;6:4;7:5;8:2;9:6;10:1;11:1,2;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:PDG-REM-GEOOCEAN-ALMA;10:;11:;
C1 Faculty of Geosciences, University of Bremen, 28359 Bremen, Germany
   MARUM – Center for Marine Environmental Sciences, University of Bremen, 28359 Bremen, Germany
   Institute for Geology, University of Hamburg, 20146 Hamburg, Germany
   Institute of Coastal Systems, Helmholtz-Zentrum Hereon, 21502 Geesthacht, Germany
   Department of Earth Sciences, Royal Holloway University of London, Egham TW20 0EY, Surrey, UK
   UMR 6538 GEO-OCEAN, Ifremer, Univ Brest, CNRS, Univ. Bretagne-Sud, 29280 Plouzané, France
C2 UNIV BREMEN, GERMANY
   UNIV BREMEN MARUM, GERMANY
   UNIV HAMBURG, GERMANY
   HZG, GERMANY
   UNIV LONDON, UK
   IFREMER, FRANCE
SI BREST
SE PDG-REM-GEOOCEAN-ALMA
UM GEO-OCEAN
IN WOS Ifremer UMR
   copubli-europe
IF 3.5
TC 5
UR https://archimer.ifremer.fr/doc/00823/93490/100236.pdf
   https://archimer.ifremer.fr/doc/00823/93490/100237.pdf
LA English
DT Article
CR PAMELA : PASSIVE MARGINS EXPLORATION LABORATORIES
   PAMELA-MOZ02
   PRISME 2
   PRISME 3
BO L'Atalante
   Pourquoi pas ?
DE ;Bottom current;contourite drift;geomorphology;moats;sediment transport;sedimentary processes
AB The interaction of sedimentary systems with oceanographic processes in deep-water environments is not well understood yet, despite its importance for palaeoenvironmental reconstructions, and for a full understanding of source-to-sink sediment transport. The aim of this study is to improve the understanding of how contourite moats, elongated depressions formed by bottom currents associated with contourite drifts, develop and of the link between moat-drift system morphology and bottom current dynamics. This study provides a systematic comparison of 185 cross-sections of moat-drift systems distributed at 39 different locations worldwide, and a detailed analysis of the morphology of six moats that cover a wide range of typical geological and hydrodynamic settings. Additionally, in situ measured current data were analysed to better link hydrodynamics to moat morphology. The median of all profiles across all moat-drift systems reveals a 50 m relief, a width of 2.3 km, a relief to width ratio of 0.022, a slope angle of 6°, a drift angle of 3° and a concave-up shaped morphology. Moats can be over 100 km long. Some moats are driven by sediment erosion while others are depositional and primarily exist due to differential sedimentation inside the moat compared to the drift alongside the moat. A new sub-classification of moat-drift systems based on their stratigraphy is proposed. This classification distinguishes moats depending on the degree of erosion versus deposition. No relation is found between latitude and moat-drift morphology or stratigraphy in the analysed examples. The combined data indicate that a steeper slope focuses the current more than a gentle slope, resulting in an increase of the relief-width ratio and drift angle. Thus, this study provides new insides into the interaction of ocean currents with sedimentary morphology, which thereby affects the evolution of a poorly understood deepwater sedimentary system. 
PY 2023
PD AUG
SO Sedimentology
SN 0037-0746
PU Wiley / Blackwell
VL 70
IS 5
UT 000956286400001
BP 1472
EP 1495
DI 10.1111/sed.13093
ID 93490
ER

EF