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Use of element-mineral correlations to investigate fractionation of rare earth elements in fine-grained sediments

Published online by Cambridge University Press:  05 July 2018

J. T. Temple  and
J. N. Walsh
J. T. Temple
Affiliation:
Department of Geology, Birkbeck College, Malet Street, London WC1E 7HX, UK
J. N. Walsh
Affiliation:
Department of Geology, RHB New College, Egham Hill, Egham, Surrey TW20 0EX, UK
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Abstract

Relative concentrations of elements in the minerals of fine-grained sediments can be inferred from element-mineral correlation coefficients. The technique is applied to the distribution of REE in Middle Ordovician shales from South Wales analysed by ICPAES, Leco C/S125 and XRD. Phosphate and chlorite show mid-REE enrichment; muscovite + biotite shows mid-REE depletion. The complementarity of the chlorite and muscovite + biotite patterns may be due to fractionation during diagenetic recrystallisation. Partial correlation analysis is used to infer the presence of zircon.

Keywords

REEfractionationfine-grained sedimentselement-mineral correlations
Type
Petrology and Geochemistry
Information
Mineralogical Magazine , Volume 58 , Issue 393 , December 1994 , pp. 533 - 541
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1994

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