Infrared stimulated luminescence dating of 19th century fluvial deposits from the upper Rhine River

Abstract: Knowledge of the age of fluvial deposits is an important aspect in the understanding of riv-er dynamics, which is pre-requisite for sustainable river management and restoration back to more natural conditions and processes. Presented here is a case study on using feldspar Infrared Stimulated Luminescence (IRSL) to date low-energy fluvial sediments that formed after correction of the Upper Rhine River in the first half of the 19th century. A rigorous testing programme is carried out to charac-terise the IRSL properties of the samples, including thermal transfer, dose recovery and fading. All samples reveal complex distributions of equivalent dose, implying the presence of differential bleach-ing in the samples. It is shown that multi-grain aliquots overestimate the known-age by up-to 200 years, i.e. apparent IRSL ages are twice as old as the true age of the sediment. The use of single grains results in ages that are in excellent agreement with the expected age, therefore the age overestimation in multi-grain aliquot measurements is likely explained by signal averaging effects. While the appli-cation of single grains appears mandatory for dating young low-energy fluvial deposits, the small ab-solute offset associated with the multi-grain approach might be acceptable when dating sediments of such type that are older than a few 1000 years

Angaben zum Objekt

• Standort: Deutsche Nationalbibliothek Frankfurt am Main
• Umfang: Online-Ressource
• Sprache: Englisch
• Anmerkungen: Geochronometria. - 43, 1 (2016) , 131-142, ISSN: 1897-1695

Beteiligte, Orts- und Zeitangaben

• Ereignis: Veröffentlichung
• (wo): Freiburg
• (wer): Universität
• (wann): 2019
• Urheber: Preusser, Frank ; May, Jan-Hendrik ; Eschbach, David ; Trauerstein, Mareike ; Schmitt, Laurent
• Beteiligte Personen und Organisationen: Albert-Ludwigs-Universität Freiburg. Professur für Sedimentologie

Weitere Informationen

• DOI: 10.1515/geochr-2015-0045
• URN: urn:nbn:de:bsz:25-freidok-1367907
• Rechteinformation: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Letzte Aktualisierung: 25.03.2025, 13:43 MEZ