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An improved method for extracting marine sediment fractions and its application to Sr and Nd isotopic analysis

An improved method for extracting marine sediment fractions and its application to Sr and Nd isotopic analysis
An improved method for extracting marine sediment fractions and its application to Sr and Nd isotopic analysis
The radiogenic isotopic composition of both detrital and Fe–Mn fractions in marine sediments can be used in paleoceanography to infer changes of bottom-water circulation. We have examined various chemical techniques for the analysis of Sr and Nd isotope ratios in these fractions and present a robust method that can be used to separate both the Fe–Mn oxides and the detrital fraction from a marine sediment sample for isotopic analysis. Our sequential leaching procedure involves the use of 10% acetic acid, followed by 1 M hydroxylamine hydrochloride in 25% acetic acid to remove the carbonate component and the Fe–Mn oxide fraction, respectively. The applicability of our chemical procedure is illustrated with examples from a marine sediment core raised from the northern Cape Basin, southeast Atlantic Ocean.
PALAEOCEANOGRAPHY, FERROMANGANESE OXIDES, STRONTIUM ISOTOPES, NEODYMIUM ISOTOPES, GEOCHEMISTRY
0009-2541
179-199
Bayon, G.
ebd811fb-f5b9-4b3b-87b7-72b6c80cdfcf
German, C.R.
cd0eedd5-1377-4182-9c8a-b06aef8c1069
Boella, R.M.
8cc9b9cb-bb4d-4954-8542-4dd034afaf6e
Milton, J.A.
9e183221-d0d4-4ddb-aeba-0fdde9d31230
Taylor, R.N.
094be7fd-ef61-4acd-a795-7daba2bc6183
Nesbitt, R.W.
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Bayon, G.
ebd811fb-f5b9-4b3b-87b7-72b6c80cdfcf
German, C.R.
cd0eedd5-1377-4182-9c8a-b06aef8c1069
Boella, R.M.
8cc9b9cb-bb4d-4954-8542-4dd034afaf6e
Milton, J.A.
9e183221-d0d4-4ddb-aeba-0fdde9d31230
Taylor, R.N.
094be7fd-ef61-4acd-a795-7daba2bc6183
Nesbitt, R.W.
6a124ad1-4e6d-4407-b92f-592f7fd682e4

Bayon, G., German, C.R., Boella, R.M., Milton, J.A., Taylor, R.N. and Nesbitt, R.W. (2002) An improved method for extracting marine sediment fractions and its application to Sr and Nd isotopic analysis. Chemical Geology, 187 (3-4), 179-199. (doi:10.1016/S0009-2541(01)00416-8).

Record type: Article

Abstract

The radiogenic isotopic composition of both detrital and Fe–Mn fractions in marine sediments can be used in paleoceanography to infer changes of bottom-water circulation. We have examined various chemical techniques for the analysis of Sr and Nd isotope ratios in these fractions and present a robust method that can be used to separate both the Fe–Mn oxides and the detrital fraction from a marine sediment sample for isotopic analysis. Our sequential leaching procedure involves the use of 10% acetic acid, followed by 1 M hydroxylamine hydrochloride in 25% acetic acid to remove the carbonate component and the Fe–Mn oxide fraction, respectively. The applicability of our chemical procedure is illustrated with examples from a marine sediment core raised from the northern Cape Basin, southeast Atlantic Ocean.

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More information

Published date: 2002
Keywords: PALAEOCEANOGRAPHY, FERROMANGANESE OXIDES, STRONTIUM ISOTOPES, NEODYMIUM ISOTOPES, GEOCHEMISTRY

Identifiers

Local EPrints ID: 6044
URI: http://eprints.soton.ac.uk/id/eprint/6044
ISSN: 0009-2541
PURE UUID: 005b05ab-22cb-4730-9399-6ad01ffe8ec9

Catalogue record

Date deposited: 10 Jun 2004
Last modified: 14 Sep 2021 17:56

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