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PERFORMANCE OF DIFFERENT LUMINESCENCE APPROACHES FOR THE DATING OF KNOWN-AGE GLACIOFLUVIAL DEPOSITS FROM NORTHERN SWITZERLAND
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
Number of Authors: 3
2014 (English)In: Geochronometria, ISSN 1733-8387, E-ISSN 1897-1695, Vol. 41, no 1, 65-80 p.Article in journal (Refereed) Published
Abstract [en]

Luminescence properties of two samples taken from sand lenses in proglacial outwash deposits of a piedmont glacier that reached the Swiss midlands during the Last Glacial Maximum are investigated in detail. Deconvolution of CW-OSL decay curves shows that the fast component dominates the OSL signal of quartz. The chemistry of single feldspar grains, in particular the K content in different grains, is determined using wavelength dispersive spectrometry (electron microprobe), revealing an average 12.9 wt.% K of the grains contributing to the IRSL signal. D-e distributions are investigated in order to gain insights into partial bleaching, and agreement is found for quartz OSL and feldspar IR50 and pIRIR(225) ages for small aliquots and single grains when applying the Minimum Age Model. These ages are also consistent with independent age control. For one sample, ages determined using the Central Age Model result in highly overestimated ages for both feldspar and quartz.

Place, publisher, year, edition, pages
2014. Vol. 41, no 1, 65-80 p.
Keyword [en]
partial bleaching, single grains, dose distributions, quartz, K-feldspar, potassium content
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-106450DOI: 10.2478/s13386-013-0139-0ISI: 000338330000007OAI: oai:DiVA.org:su-106450DiVA: diva2:736170
Note

AuthorCount:3;

Available from: 2014-08-05 Created: 2014-08-04 Last updated: 2017-12-05Bibliographically approved

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