Rare earth element association with foraminifera

Roberts, Natalie L. and Piotrowski, Alexander M. and Elderfield, Henry and Lomas, Michael W. (2012) Rare earth element association with foraminifera. Geochimica et Cosmochimica Acta, 94. pp. 57-71. ISSN 0016-7037 DOI 10.1016/j.gca.2012.07.009

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Abstract

Neodymium isotopes are becoming widely used as a palaeoceanographic tool for reconstructing the source and flow direction of water masses. A new method using planktonic foraminifera which have not been chemically cleaned has proven to be a promising means of avoiding contamination of the deep ocean palaeoceanographic signal by detrital material. However, the exact mechanism by which the Nd isotope signal from bottom waters becomes associated with planktonic foraminifera, the spatial distribution of rare earth element (REE) concentrations within the shell, and the possible mobility of REE ions during changing redox conditions, have not been fully investigated. Here we present REE concentration and Nd isotope data from mixed species of planktonic foraminifera taken from plankton tows, sediment traps and a sediment core from the NW Atlantic. We used multiple geochemical techniques to evaluate how, where and when REEs become associated with planktonic foraminifera as they settle through the water column, reside at the surface and are buried in the sediment.

Item Type: Article
Uncontrolled Keywords: 2012AREP; IA64;
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title: Geochimica et Cosmochimica Acta
Volume: 94
Page Range: pp. 57-71
Identification Number: 10.1016/j.gca.2012.07.009
Depositing User: Sarah Humbert
Date Deposited: 24 Aug 2012 15:38
Last Modified: 23 Jul 2013 10:04
URI: http://eprints.esc.cam.ac.uk/id/eprint/2585

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