FN Archimer Export Format
PT J
TI Foraminiferal sandy contourite of the Limpopo Corridor (Mozambique margin): Facies characterization and paleoceanographic record
BT 
AF Lopes, U.
   Babonneau, Nathalie
   Fierens, R.
   Revillon, Sidonie
   Raisson, F.
   Miramontes, E.
   Rabineau, Marina
   Aslanian, Daniel
   Moulin, Maryline
AS 1:6;2:6;3:6;4:2,7;5:3;6:4,5;7:7;8:1;9:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:PDG-REM-GEOOCEAN-GIPS;9:PDG-REM-GEOOCEAN-GIPS;
C1 Geo-Ocean, Univ Brest, CNRS, Ifremer, UMR6538, F-29280 Plouzané, France
   SEDISOR, place N. Copernic, 29280 Plouzané, France
   TotalEnergies, CSTJF, Avenue Larribau, 64000 Pau, France
   MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen 28359, Germany
   Faculty of Geosciences, University of Bremen, Bremen 28359, Germany
   Geo-Ocean, Univ Brest, CNRS, Ifremer, UMR6538, F-29280 Plouzané, France
   Geo-Ocean, Univ Brest, CNRS, Ifremer, UMR6538, F-29280 Plouzané, France
C2 IFREMER, FRANCE
   SEDISOR, FRANCE
   TOTAL ENERGIES, FRANCE
   UNIV BREMEN MARUM, GERMANY
   UNIV BREMEN, GERMANY
   UBO, FRANCE
   CNRS, FRANCE
SI BREST
SE PDG-REM-GEOOCEAN-GIPS
UM GEO-OCEAN
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-europe
   copubli-univ-france
IF 2.9
TC 0
UR https://archimer.ifremer.fr/doc/00832/94396/101818.pdf
LA English
DT Article
CR PAMELA : PASSIVE MARGINS EXPLORATION LABORATORIES
   PAMELA-MOZ03
BO Pourquoi pas ?
DE ;Bottom current;Contourite;Foraminiferal sand;Paleoceanography;Mozambique Channel;Indian Ocean;Quaternary
AB Contourites encompass a wide variety of sedimentary facies. Some of them show common facies with others deep-water deposits, such as turbidites and hemipelagites. Sedimentological characterization at macro- and microscales is valuable to discriminate those close facies but the distinction is not always clear. Contourites are increasingly used in paleoceanographic and paleoclimatic reconstructions. Improving their characterization is therefore essential to their interpretations. This study aims at characterizing a foraminiferal sandy contourite facies from a sediment core collected on top of a contourite drift under the influence of the Antarctic Intermediate Water/North Atlantic Deep-Water interface located in the Limpopo Corridor (Mozambique margin, Indian Ocean) at 2000 m depth. This work is based on a detailed analysis of the sedimentary record using physical properties (gamma density and magnetic susceptibility) as well as laser grain size and X-Ray Fluorescence core scanning data. Our results show that: (1) the foraminiferal sand is vertically continuous and homogenous over 633 kyr with an average sedimentation rate of 0.26 cm.kyr−1; (2) this contourite facies results from sedimentation with low terrigenous inputs under stable hydrodynamic conditions over time, with relatively strong bottom currents for this water depth (∼16 cm.s−1); (3) during glacial stages, sedimentation rates are lower and bottom current speed is higher than during interglacial stages. We also propose the concept of “Contourite Graphical Chart” which summaries the theoretical distribution of contourite endmembers from cross-plot of “sorting versus grain-size median D50” and their related sedimentary processes. This study highlights the relevance of condensed foraminiferal sandy contourites as long time-scale paleoceanographic archives and provides new insights for studies related to paleoclimatology and paleoecology. 
PY 2023
PD MAY
SO Marine Geology
SN 0025-3227
PU Elsevier BV
VL 459
UT 000982506900001
DI 10.1016/j.margeo.2023.107031
ID 94396
ER

EF