Imperial College London
Portrait Picture

ProfessorTinavan de Flierdt

Faculty of Engineering, Department of Earth Science & Engineering

Head of the Department of Earth Science and Engineering
 
 
 
//

Contact

 

+44 (0)20 7594 1290tina.vandeflierdt

 
 
//

Location

 

G.30Royal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Struve:2017:10.1016/j.chemgeo.2017.01.022,
author = {Struve, T and van, de Flierdt T and Burke, A and Robinson, LF and Hammond, SJ and Crocket, KC and Bradtmiller, LI and Auro, ME and Mohamedi, KJ and White, NJ},
doi = {10.1016/j.chemgeo.2017.01.022},
journal = {Chemical Geology},
pages = {146--168},
title = {Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - Modern calibration and evaluation of palaeo-applications},
url = {http://dx.doi.org/10.1016/j.chemgeo.2017.01.022},
volume = {453},
year = {2017}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Cold-water corals (CWCs) are unique archives of mid-depth ocean chemistry and have been used successfully to reconstruct the neodymium (Nd) isotopic composition of seawater from a number of species. High and variable Nd concentrations in fossil corals however pose the question as to how Nd is incorporated into their skeletons.We here present new results on modern specimens of Desmophyllum dianthus, Balanophyllia malouinensis, and Flabellum curvatum, collected from the Drake Passage, and Madrepora oculata, collected from the North Atlantic. All modern individuals were either collected alive or uranium-series dated to be < 500 years old for comparison with local surface sediments and seawater profiles. Modern coral Nd isotopic compositions generally agree with ambient seawater values, which in turn are consistent with previously published seawater analyses, supporting small vertical and lateral Nd isotope gradients in modern Drake Passage waters. Two Balanophyllia malouinensis specimens collected live however deviate by up to 0.6 epsilon units from ambient seawater. We therefore recommend that this species should be treated with caution for the reconstruction of past seawater Nd isotopic compositions.Seventy fossil Drake Passage CWCs were furthermore analysed for their Nd concentrations, revealing a large range from 7.3 to 964.5 ng/g. Samples of the species D. dianthus and Caryophyllia spp. show minor covariation of Nd with 232Th content, utilised to monitor contaminant phases in cleaned coral aragonite. Strong covariations between Nd and Th concentrations are however observed in the species B. malouinensis and G. antarctica. In order to better constrain the source and nature of Nd in the cleaned aragonitic skeletons, a subset of sixteen corals was investigated for its rare earth element (REE) content, as well as major and trace element geochemistry. Our new data provide supporting evidence that the applied cleaning protocol efficiently removes contaminant lithogen
AU  - Struve,T
AU  - van,de Flierdt T
AU  - Burke,A
AU  - Robinson,LF
AU  - Hammond,SJ
AU  - Crocket,KC
AU  - Bradtmiller,LI
AU  - Auro,ME
AU  - Mohamedi,KJ
AU  - White,NJ
DO  - 10.1016/j.chemgeo.2017.01.022
EP  - 168
PY  - 2017///
SN  - 1872-6836
SP  - 146
TI  - Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - Modern calibration and evaluation of palaeo-applications
T2  - Chemical Geology
UR  - http://dx.doi.org/10.1016/j.chemgeo.2017.01.022
UR  - http://hdl.handle.net/10044/1/44234
VL  - 453
ER  -
Download