Understanding processes of sediment bleaching in glacial settings using a portable OSL reader

King, G. E., Sanderson, D. C.W. , Robinson, R. A.J. and Finch, A. A. (2014) Understanding processes of sediment bleaching in glacial settings using a portable OSL reader. Boreas, 43(4), pp. 955-972. (doi: 10.1111/bor.12078)

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Analysis of a high-resolution suite of modern glacial sediments from Jostedalen, southern Norway, using a portable optically stimulated luminescence (OSL) reader, provides insights into the processes of sediment bleaching in glacial environments at the catchment scale. High-magnitude, low-frequency processes result in the least effective sediment bleaching, whereas low-magnitude, high-frequency events provide greater bleaching opportunities. Changes in sediment bleaching can also be identified at the scale of individual bar features: tails of braid-bars and side-attached bar deposits have the lowest portable reader signal intensities, as well as the smallest conventional OSL residual doses. In addition to improving our understanding of the processes of sediment bleaching, portable reader investigations can also facilitate more rapid and comprehensive modern analogue investigations, which are commonly used to confirm that the OSL signals of modern glacial sediments are well bleached.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Sanderson, Professor David
Authors: King, G. E., Sanderson, D. C.W., Robinson, R. A.J., and Finch, A. A.
College/School:College of Science and Engineering > Scottish Universities Environmental Research Centre
Journal Name:Boreas
Publisher:John Wiley & Sons Ltd.
ISSN (Online):1502-3885
Copyright Holders:Copyright © 2014 The Authors
First Published:First published in Boreas 43(4):955-972
Publisher Policy:Reproduced under a Creative Commons License

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