Testing an approach to OSL dating of Late Devensian glaciofluvial sediments of the British Isles
Abstract In the British and Irish Isles, the understanding of expansion and retreat of the last ice sheet in Marine Isotope Stage (MIS) 2 has been hindered by a lack of chronological control for the timing of its maximum extent and subsequent retreat stages. In this research, a suite of lithofacies...
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crwiley:10.1002/jqs.1253 2024-06-02T08:08:19+00:00 Testing an approach to OSL dating of Late Devensian glaciofluvial sediments of the British Isles Thrasher, I. M. Mauz, B. Chiverrell, R. C. Lang, A. Thomas, G. S. P. University of Liverpool Quaternary Research Association 2009 http://dx.doi.org/10.1002/jqs.1253 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1253 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1253 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 24, issue 7, page 785-801 ISSN 0267-8179 1099-1417 journal-article 2009 crwiley https://doi.org/10.1002/jqs.1253 2024-05-03T12:03:41Z Abstract In the British and Irish Isles, the understanding of expansion and retreat of the last ice sheet in Marine Isotope Stage (MIS) 2 has been hindered by a lack of chronological control for the timing of its maximum extent and subsequent retreat stages. In this research, a suite of lithofacies from a former distal ice marginal sandur at Orrisdale, Isle of Man, were identified and selected for optically stimulated luminescence dating. Different‐size fractions of quartz grains were extracted from selected lithofacies types with the aim of identifying which depositional environments and grain size fractions are best suited for optical dating. Tests have been undertaken to identify the luminescence properties of this quartz, including preheat dose recovery and constant‐wave optically stimulated luminescence (OSL) decay curve fitting. Equivalent dose distributions for all samples were wide and positively skewed, indicative of heterogeneous bleaching. A comprehensive statistically based decision‐making protocol has been defined in order to find the appropriate statistical model for burial dose estimation. Ages in the range of 17–14 ka have been obtained which agree with the expected geologically constrained chronology. The Orrisdale Formation is contemporaneous with Heinrich Event 1 and the Killard Point Stadial identified in eastern Ireland ca. 16.4 ka. The suggested approach for OSL dating of glaciofluvial sediments has the potential for much wider application to high latitude or temperate areas where there is an abundance of such sediments and where improved chronological control is much needed. Copyright © 2009 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice Sheet Wiley Online Library Journal of Quaternary Science 24 7 785 801 |
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English |
description |
Abstract In the British and Irish Isles, the understanding of expansion and retreat of the last ice sheet in Marine Isotope Stage (MIS) 2 has been hindered by a lack of chronological control for the timing of its maximum extent and subsequent retreat stages. In this research, a suite of lithofacies from a former distal ice marginal sandur at Orrisdale, Isle of Man, were identified and selected for optically stimulated luminescence dating. Different‐size fractions of quartz grains were extracted from selected lithofacies types with the aim of identifying which depositional environments and grain size fractions are best suited for optical dating. Tests have been undertaken to identify the luminescence properties of this quartz, including preheat dose recovery and constant‐wave optically stimulated luminescence (OSL) decay curve fitting. Equivalent dose distributions for all samples were wide and positively skewed, indicative of heterogeneous bleaching. A comprehensive statistically based decision‐making protocol has been defined in order to find the appropriate statistical model for burial dose estimation. Ages in the range of 17–14 ka have been obtained which agree with the expected geologically constrained chronology. The Orrisdale Formation is contemporaneous with Heinrich Event 1 and the Killard Point Stadial identified in eastern Ireland ca. 16.4 ka. The suggested approach for OSL dating of glaciofluvial sediments has the potential for much wider application to high latitude or temperate areas where there is an abundance of such sediments and where improved chronological control is much needed. Copyright © 2009 John Wiley & Sons, Ltd. |
author2 |
University of Liverpool Quaternary Research Association |
format |
Article in Journal/Newspaper |
author |
Thrasher, I. M. Mauz, B. Chiverrell, R. C. Lang, A. Thomas, G. S. P. |
spellingShingle |
Thrasher, I. M. Mauz, B. Chiverrell, R. C. Lang, A. Thomas, G. S. P. Testing an approach to OSL dating of Late Devensian glaciofluvial sediments of the British Isles |
author_facet |
Thrasher, I. M. Mauz, B. Chiverrell, R. C. Lang, A. Thomas, G. S. P. |
author_sort |
Thrasher, I. M. |
title |
Testing an approach to OSL dating of Late Devensian glaciofluvial sediments of the British Isles |
title_short |
Testing an approach to OSL dating of Late Devensian glaciofluvial sediments of the British Isles |
title_full |
Testing an approach to OSL dating of Late Devensian glaciofluvial sediments of the British Isles |
title_fullStr |
Testing an approach to OSL dating of Late Devensian glaciofluvial sediments of the British Isles |
title_full_unstemmed |
Testing an approach to OSL dating of Late Devensian glaciofluvial sediments of the British Isles |
title_sort |
testing an approach to osl dating of late devensian glaciofluvial sediments of the british isles |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1002/jqs.1253 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1253 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1253 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Journal of Quaternary Science volume 24, issue 7, page 785-801 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.1253 |
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Journal of Quaternary Science |
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24 |
container_issue |
7 |
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785 |
op_container_end_page |
801 |
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1800753535974899712 |