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Revisiting the loess/palaeosol sequence in Paks, Hungary: A post-IR IRSL based chronology for the ‘Young Loess Series’

Authors
  • Thiel, Christine
  • Horváth, Erzsébet
  • Frechen, Manfred
Publication Date
Jan 01, 2014
Source
Online Research Database In Technology
License
Unknown
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Abstract

<p>In Hungary, many loess/palaeosol sequences have been found to be discontinuous. In order to allow for correlations with other Quaternary records, reliable chronologies are needed.We therefore apply post-IR infrared (IR) stimulated luminescence (post-IR IRSL; pIRIR<sub><strong>290</strong></sub>) dating to the uppermost 20 m of the loess sequence at Paks. The pIRIR<sub>290</sub> ages are compared with blue quartz OSL ages to test for potential age overestimation due to poor signal re-setting, and the observed good agreement is taken to imply that the more difficult to bleach pIRIR<sub>290</sub> signal was reset prior to deposition. Our pIRIR<sub>290</sub> based chronology reveals that most of the Late Pleistocene loess was deposited during marine isotope stage (MIS) 3 and during the Last Glacial Maximum (LGM). This is in disagreement with formerly published ages. The discrepancy can most likely be explained by anomalous fading (resulting in an age underestimate); this conclusion is supported by our uncorrected ‘standard’ IRSL ages. We further confirm that the Basaharc Double soil complex can be correlated with MIS 7; the underlying loess and soils cannot be dated accurately because the pIRIR<sub>290</sub> signal approaches saturation. © 2013 Elsevier Ltd and INQUA. All rights reserved.</p>

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