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

Bayon, G.; German, C.R.; Boella, R.M.; Milton, J.A.; Taylor, R.N.; 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. 10.1016/S0009-2541(01)00416-8

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Abstract/Summary

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.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/S0009-2541(01)00416-8
ISSN: 0009-2541
Additional Keywords: PALAEOCEANOGRAPHY, FERROMANGANESE OXIDES, STRONTIUM ISOTOPES, NEODYMIUM ISOTOPES, GEOCHEMISTRY
Date made live: 10 Jun 2004 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/106044

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