FN Archimer Export Format
PT J
TI Formation and evolution of glauconite in the Demerara Contourite depositional system related to NADW circulation changes during late Quaternary (French Guiana)
BT 
AF Tallobre, Cédric
   Giresse, Pierre
   Bassetti, Maria-Angela
   Loncke, Lies
   Bayon, Germain
   Buscail, Roselyne
   Tudryn, Alina
   Zaragosi, Sébastien
AS 1:1,2;2:1,2;3:1,2;4:1,2;5:3;6:1,2;7:4;8:5;
FF 1:;2:;3:;4:;5:PDG-REM-GM-LGS;6:;7:;8:;
C1 Univ. Perpignan Via Domitia, Centre de Formation et de Recherche sur les Environnements Méditerranéens (CEFREM), UMR 5110, 52 Avenue Paul Alduy, 66860, Perpignan, France
   CNRS, Centre de Formation et de Recherche sur les Environnements Méditerranéens (CEFREM), UMR 5110, 52 Avenue Paul Alduy, 66860, Perpignan, France
   IFREMER, Unité de Recherche Géosciences Marines, 29280, Plouzané, France
   GEOPS, Univ. Paris-Sud, CNRS, Université Paris-Saclay, Rue du Belvédère, Bât. 504-509, 91405, Orsay, France
   Université de Bordeaux, Environnements et Paléoenvironnements Océaniques et Continentaux, UMR CNRS 5805 EPOC, Allée Geoffroy Saint-Hilaire, CS 50023 - 33615, Pessac cedex, France
C2 UNIV PERPIGNAN, FRANCE
   CNRS, FRANCE
   IFREMER, FRANCE
   UNIV PARIS SUD, FRANCE
   UNIV BORDEAUX, FRANCE
SI BREST
SE PDG-REM-GM-LGS
IN WOS Ifremer UPR
   copubli-france
   copubli-univ-france
IF 1.704
TC 14
UR https://archimer.ifremer.fr/doc/00485/59665/62724.pdf
LA English
DT Article
CR IGUANES
BO L'Atalante
DE ;Marginal plateau;Contourite;Glauconite;Demerara plateau
AB The Demerara Plateau is a marginal plateau which forms a bathymetric relief on the sea floor. Here, contourite deposits have been studied in detail, following the recent discovery of contourite sequences likely related to the bottom currents and linked both to contour current and peculiar sea-floor morphology. A chronostratigraphic framework, based on δ18O relative variations and palaeomagnetic events in sediment cores allows correlating sediment processes to current intensity changes and major climate phases (glacial or interglacial). The studied sediments are enriched in glauconitic grains. In addition, the glauconite mineralogical maturity can easily correlate to low sedimentation rate and slightly energetic bottom currents on the seafloor. Based on these data and using the glauconitic authigenic mineral as proxy for inferring the degree of winnowing at the sediment-water interface, we might put forward the hypothesis that the intensity of NADW is higher during the glacial stages and lower during interglacial periods. 
PY 2019
PD JUL
SO Journal Of South American Earth Sciences
SN 0895-9811
PU Elsevier BV
VL 92
UT 000469893100015
BP 167
EP 183
DI 10.1016/j.jsames.2019.03.011
ID 59665
ER

EF