<abstract xmlns="http://www.w3.org/1999/xhtml"> Luminescence dating was applied on coarse-grained monomineralic potassium-rich feld-spar and polymineralic fine-grained minerals of five samples derived from fluvial deposits of the Riv-er Weser in northwestern Germany. We used a pulsed infrared stimulated luminescence (IRSL) single aliquot regenerative (SAR) dose protocol with an IR stimulation at 50°C for 400 s (50 μs on-time and 200 μs off-time). In order to obtain a stable luminescence signal, only off-time IRSL signal was rec-orded. Performance tests gave solid results. Anomalous fading was intended to be reduced by using the pulsed IRSL signal measured at 50°C (IR50), but fading correction was in most cases necessary due to moderate fading rates. Fading uncorrected and corrected pulsed IR50 ages revealed two major fluvial aggradation phases during the Late Pleistocene, namely during marine isotope stage (MIS) 5d (100 ± 5 ka) and from late MIS 5b to MIS 4 (77 ± 6 ka to 68 ± 5 ka). The obtained luminescence ages are consistent with previous 230Th/U dating results from underlying interglacial deposits of the same pit, which are correlated with MIS 7c to early MIS 6. </abstract>

Luminescence dating was applied on coarse-grained monomineralic potassium-rich feld-spar and polymineralic fine-grained minerals of five samples derived from fluvial deposits of the Riv-er Weser in northwestern Germany. We used a pulsed infrared stimulated luminescence (IRSL) single aliquot regenerative (SAR) dose protocol with an IR stimulation at 50°C for 400 s (50 μs on-time and 200 μs off-time). In order to obtain a stable luminescence signal, only off-time IRSL signal was rec-orded. Performance tests gave solid results. Anomalous fading was intended to be reduced by using the pulsed IRSL signal measured at 50°C (IR50), but fading correction was in most cases necessary due to moderate fading rates. Fading uncorrected and corrected pulsed IR50 ages revealed two major fluvial aggradation phases during the Late Pleistocene, namely during marine isotope stage (MIS) 5d (100 ± 5 ka) and from late MIS 5b to MIS 4 (77 ± 6 ka to 68 ± 5 ka). The obtained luminescence ages are consistent with previous 230Th/U dating results from underlying interglacial deposits of the same pit, which are correlated with MIS 7c to early MIS 6.

Luminescence Dating of Fluvial Deposits from the Weser Valley, Germany

Institut für Geologie, Leibniz Universität Hannover, Callinstraße 30, D-30167 Hannover, Germany / Leibniz Institute for Applied Geophysics (LIAG), Stilleweg 2, D-30655 Hannover, Germany

Leibniz Institute for Applied Geophysics (LIAG), Stilleweg 2, D-30655 Hannover, Germany

Geochronometria

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Luminescence Dating of Fluvial Deposits from the Weser Valley, Germany"}

Luminescence dating was applied on coarse-grained monomineralic potassium-rich feld-spar and polymineralic fine-grained minerals of five samples derived from...

Luminescence Dating of Fluvial Deposits from the Weser Valley, Germany

Publié en ligne: 11 juil. 2015

Pages: -

Reçu: 25 oct. 2014

Accepté: 25 mai 2015

DOI: https://doi.org/10.1515/geochr-2015-0015

Mots clés
pulsed infrared stimulated luminescence, fluvial deposits, independent age control, Late Pleistocene, Weser valley, northern Germany

© 2015

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Luminescence Dating of Fluvial Deposits from the Weser Valley, Germany

Publié en ligne: 11 juil. 2015

Pages: -

Reçu: 25 oct. 2014

Accepté: 25 mai 2015

DOI: https://doi.org/10.1515/geochr-2015-0015

Mots cléspulsed infrared stimulated luminescence, fluvial deposits, independent age control, Late Pleistocene, Weser valley, northern Germany

© 2015

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
pulsed infrared stimulated luminescence, fluvial deposits, independent age control, Late Pleistocene, Weser valley, northern Germany