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Rare earth element geochemistry of upper Ordovician cherts from the Southern Uplands of Scotland

Owen, A.W., Armstrong, H.A., and Floyd, J.D. (1999) Rare earth element geochemistry of upper Ordovician cherts from the Southern Uplands of Scotland. Journal of the Geological Society, 156 (1). pp. 191-204. ISSN 0016-7649

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Abstract

Caradoc and Ashgill radiolarian cherts and siliceous mudstones from the Southern Uplands preserve primary rare earth element (REE) signatures which are comparable to those of more recent deposits from continental margin settings. This is incompatible with the widely held view of these rocks as open ocean deposits incorporated in an accretionary prism and reinforces the model of deposition on an extensional continental margin. The REE signatures can be used as fingerprints to differentiate between some of the fault-bounded formations within the area. They indicate the provenance of the mud grade siliciclastic material in these distal hemipelagites and are comparable with published REE data on greywackes in the same successions. This detailed analysis of the REE patterns in Lower Palaeozoic cherts demonstrates the usefulness of this approach in ancient orogens.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Owen, Dr Alan
Authors: Owen, A.W., Armstrong, H.A., and Floyd, J.D.
Subjects:Q Science > QE Geology
College/School:College of Science and Engineering > School of Geographical and Earth Sciences
Journal Name:Journal of the Geological Society
Publisher:Geological Society of London
ISSN:0016-7649
Copyright Holders:Copyright © 1999 The Geological Society of London
First Published:First published in Journal of the Geological Society 156(1) 191 - 204
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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