FN Archimer Export Format
PT J
TI Tropical mangrove forests as a source of dissolved rare earth elements and yttrium to the ocean
BT 
AF Dang, Duc Huy
   Zhang, Zhirou
   Wang, Wei
   Oursel, Benjamin
   Juillot, Farid
   Dupouy, Cecile
   Lemonnier, Hugues
   Mounier, Stephane
AS 1:1,2;2:1;3:1;4:3;5:4,5;6:3,5;7:6;8:7;
FF 1:;2:;3:;4:;5:;6:;7:PDG-RBE-LEADNC;8:;
C1 Trent School of the Environment, Trent University, Peterborough, Canada
   Department of Chemistry, Trent University, Peterborough, Canada
   Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO, Marseille, France
   Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, Sorbonne Université, UMR CNRS 7590, MNHN, ERL IRD 206, Paris, France
   Institut de Recherche pour le Developpement (IRD), Centre IRD Noumea, Nouvelle-Calédonie, France
   IFREMER, IRD, Université de la Nouvelle-Calédonie, Université de La Réunion, UMR 92200 ENTROPIE, Nouméa, Nouvelle-Calédonie, France
   Université de Toulon, Aix Marseille Université, CNRS, IRD, MIO, Toulon, France
C2 UNIV TRENT, CANADA
   UNIV TRENT, CANADA
   UNIV AIX MARSEILLE, FRANCE
   UNIV SORBONNE, FRANCE
   IRD, FRANCE
   IFREMER, FRANCE
   UNIV TOULON, FRANCE
SI NOUMEA
SE PDG-RBE-LEADNC
UM ENTROPIE
IN WOS Ifremer UMR
   copubli-france
   copubli-p187
   copubli-univ-france
   copubli-int-hors-europe
IF 4.685
TC 6
UR https://archimer.ifremer.fr/doc/00691/80345/97857.pdf
LA English
DT Article
DE ;Rare earth elements;yttrium;water stable isotopes;mangrove;estuary
AB Rare earth elements (REEs) and Y, or REYs, are commonly used as geochemical proxies for water chemistry, history of the continental crust and provenance studies. At the continent-ocean interface, the estuarine geochemistry of REYs is commonly thought to be driven by large-scale removal of the dissolved fraction. Consequently, contributions of river-borne dissolved REYs to the marine budget are assumed to represent a minor fraction of the total flux. Here, we report a significant release of dissolved REYs, together with a fractionation between light REEs, heavy REEs and Y, in the tropical mangrove estuaries of New Caledonia. These observations were associated with biogeochemical processes of the redox-dynamic mangrove system, rather than a possible contribution of REYs from a fresh groundwater source, based on stable water isotope compositions. These findings imply that tropical mangrove estuaries may act as a sizeable source of REYs to the ocean rather than buffer zones, at least for the dissolved fraction. We also extrapolated our data to compute the contributions of dissolved REY fluxes from the mangroves to global oceans. This preliminary calculation suggests that the mangrove system supplies 2.6-5% of global river-borne dissolved Nd, an REE with the most comprehensive mass balance. Therefore, given that the ocean mass budget of REYs remains unbalanced with fluxes missing on a global scale, considering the mangrove system as an input of oceanic mass balance models may help improve our understanding of the global distribution of REYs. 
PY 2021
PD AUG
SO Chemical Geology
SN 0009-2541
PU Elsevier BV
VL 576
UT 000658933300002
DI 10.1016/j.chemgeo.2021.120278
ID 80345
ER

EF