FN Archimer Export Format
PT J
TI Sulfate minerals control dissolved rare earth element flux and Nd isotope signature of buoyant hydrothermal plume (EMSO-Azores, 37°N Mid-Atlantic Ridge)
BT 
AF CHAVAGNAC, Valerie
   ALI, Hassan Saleban
   JEANDEL, Catherine
   LELEU, Thomas
   DESTRIGNEVILLE, Christine
   CASTILLO, Alain
   COTTE, Laura
   WAELES, Mathieu
   CATHALOT, Cecile
   LAES, Agathe
   PELLETER, Ewan
   NONNOTTE, Philippe
   SARRADIN, Pierre-Marie
   CANNAT, Mathilde
AS 1:1;2:1;3:2;4:1;5:1;6:1;7:3,4;8:3;9:5;10:6;11:5;12:7;13:4;14:8;
FF 1:;2:;3:;4:;5:;6:;7:PDG-REM-EEP-LEP;8:;9:PDG-REM-GM-LCG;10:PDG-REM-RDT-LDCM;11:PDG-REM-GM-LCG;12:;13:PDG-REM-EEP;14:;
C1 Univ Toulouse, CNRS, IRD, GET,UPS, 14 A Edouard Belin, F-31400 Toulouse, France.
   Univ Toulouse, CNRS, CNES, LEGOS,IRD,UPS, 14 A Edouard Belin, F-31400 Toulouse, France.
   Univ Bretagne Occidentale, IUEM, CNRS, LEMAR,UMR 6539, Pl Copernic, F-29280 Plouzane, France.
   IFREMER, EEP, REM, ZI Pointe Diable,LEP, CS 10070, F-29280 Plouzane, France.
   IFREMER, GM, REM, ZI Pointe Diable,LCG, CS 10070, F-29280 Plouzane, France.
   IFREMER, RDT, LDCM, ZI Pointe Diable, CS 10070, F-29280 Plouzane, France.
   Univ Bretagne Occidentale, CNRS, IRD, LGO,IUEM, Pl Copernic, F-29280 Plouzane, France.
   Univ Sorbonne Paris Cite, CNRS, Inst Phys Globe Paris, 1 Rue Jussieu, F-75238 Paris 05, France.
C2 UNIV TOULOUSE, FRANCE
   UNIV TOULOUSE, FRANCE
   UBO, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   UBO, FRANCE
   IPGP, FRANCE
SI BREST
SE PDG-REM-EEP-LEP
   PDG-REM-GM-LCG
   PDG-REM-RDT-LDCM
   PDG-REM-EEP
UM LEMAR
   LGO
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 3.618
TC 16
UR https://archimer.ifremer.fr/doc/00456/56733/58511.pdf
LA English
DT Article
CR MOMARSAT : MONITORING THE MID ATLANTIC RIDGE
DE ;Black smokers;Rare earth elements;Neodymium isotopes;Hydrothermal;Sulfate minerals;EMSO-Azores
AB While hydrothermal vents are now thought to be a major source of dissolved iron to the oceans, they have always been considered to be a sink for the dissolved rare-earth elements (DREEs). However, true dissolved REE observations in hydrothermal plumes are still lacking. Here we report for the first time the DREE concentrations and neodymium isotopic compositions (DεNd) of buoyant hydrothermal fluids at Lucky Strike (Mid-Atlantic Ridge). We find that 27 to 62% of total hydrothermal DREEs are rapidly scavenged by anhydrite precipitation at the onset of buoyant plume formation. After this initial loss, all DREEs behave quasi-conservatively within the buoyant plume. Dissolved phase εNd (DεNd) in the evolving plume are identical to black smoker DεNd of +9.0 and contrast radically with DεNd of the local deep water mass at −12.0. Plume DεNd as low as +6.6 may be reconciled by dissolution of newly formed barite in the local environment and carrying seawater DεNd signature. We find, based on the first plume DREE observations, that hydrothermal plumes are in fact a source of DREE to the North Atlantic Deep Water. Precipitation/dissolution processes of hydrothermally-derived minerals, i.e. sulfates in the buoyant plume and Fe oxy-hydroxide in the non-buoyant plume, will likely affect the fate of other trace metals and their isotopic composition. 
PY 2018
PD NOV
SO Chemical Geology
SN 0009-2541
PU Elsevier Science Bv
VL 499
UT 000447407300008
BP 111
EP 125
DI 10.1016/j.chemgeo.2018.09.021
ID 56733
ER

EF