OSLdating and luminescence characteristics of aeolian deposits and their source material in Dalarna, central Sweden

Helena Alexanderson; Martin Bernhardson

doi:10.1111/bor.12197

journal article Jul 30, 2016

OSLdating and luminescence characteristics of aeolian deposits and their source material in Dalarna, central Sweden

Helena Alexanderson Martin Bernhardson

Boreas Vol. 45 No. 4 pp. 876-893 · Wiley

View at Publisher Save 10.1111/bor.12197

Abstract

Aeolian dunes, coversands, glacifluvial deltas and paraglacial mass‐movement deposits in Bonäsheden and Skattungheden in Dalarna, central Sweden were dated by optically stimulated luminescence (OSL) on quartz. TheOSLages confirm that the majority of the dunes started forming directly after deglaciation, as suggested by previous investigators. Dune formation seems to have lasted at least 1500 years, untilc. 9 ka. Four younger episodes of sand drift resulting in coversand deposition were dated byOSLand/or radiocarbon to 4100±200 a, 1569–1412 cal. aBP, 970±60 a and 150±10 a. The youngest one is related to changes in land use, while the older ones may be due to regional climatic changes. The dated quartz had excellent luminescence characteristics; the luminescence was bright and dominated by the fast signal component, which made it possible to successfully analyse even untreated material, so‐called range‐finder dating. These characteristics are most likely inherited from one of the source rocks of the Quaternary deposits – the Mesoproterozoic Dala sandstone, which we show to also have very good luminescence properties.

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References

Details

Published: Jul 30, 2016
Vol/Issue: 45(4)
Pages: 876-893
License: View

Authors

H

Helena Alexanderson

Department of Geology Lund University Sölvegatan 12 SE‐223 62 Lund Sweden

M

Martin Bernhardson

Department of Geology Lund University Sölvegatan 12 SE‐223 62 Lund Sweden

Funding

Sveriges Geologiska Undersökning Award: 61‐1555/2012

Cite This Article

Helena Alexanderson, Martin Bernhardson (2016). OSLdating and luminescence characteristics of aeolian deposits and their source material in Dalarna, central Sweden. Boreas, 45(4), 876-893. https://doi.org/10.1111/bor.12197

OSLdating and luminescence characteristics of aeolian deposits and their source material in Dalarna, central Sweden

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