Differentiating lithogenic supplies, water mass transport, and biological processes On and Off the Kerguelen Plateau using rare earth element concentrations and neodymium isotopic compositions ...

Distributions of dissolved rare earth element (REE) concentrations and neodymium isotopic compositions (expressed as εNd) of seawater over and off the Kerguelen Plateau in the Southern Ocean are presented. The sampling took place during the austral spring bloom in October–November 2011 (KEOPS2 proje...

Full description

Bibliographic Details
Main Authors: Grenier, Melanie, Garcia-Solsona, Ester, Lemaitre, Nolwenn, Trull, Thomas W., Bouvier, Vincent, Nonnotte, Philippe, Van Bee, Pieter, Souhaut, Marc, Lacan, Francois, Jeandel, Catherine
Format: Article in Journal/Newspaper
Language:English
Published: ETH Zurich 2018
Subjects:
Online Access:https://dx.doi.org/10.3929/ethz-b-000307946
http://hdl.handle.net/20.500.11850/307946
Description
Summary:Distributions of dissolved rare earth element (REE) concentrations and neodymium isotopic compositions (expressed as εNd) of seawater over and off the Kerguelen Plateau in the Southern Ocean are presented. The sampling took place during the austral spring bloom in October–November 2011 (KEOPS2 project, GEOTRACES process study) and aimed to further the investigations of the KEOPS1 austral summer study in terms of sources and transport of lithogenic material, and to investigate the impact of local biogeochemical cycles on the REE distributions. The REE signature of the coastal eastern Kerguelen Islands waters was characterized by negative europium anomalies (Eu/Eu*) and negative εNd in filtered samples. By contrast, the unfiltered sample showed a positive Eu/Eu* and more radiogenic εNd. These distinct signatures could reflect either differential dissolution of the local flood basalt minerals or differential leaching of local trachyte veins. The dissolved Kerguelen coastal REE patterns differ from those ... : Frontiers in Marine Science, 5 ...