Luminescence Dating of Glaciofluvial Deposits Linked to the Penultimate
Quaternary International 357 (2015) 110e124 Contents lists available at ScienceDirect Quaternary International journal homepage: www.elsevier.com/locate/quaint Luminescence dating of glaciofluvial deposits linked to the penultimate glaciation in the Eastern Alps * Lukas Bickel a, , Christopher Lüthgens a, Johanna Lomax b, Markus Fiebig a a Institute of Applied Geology, Department of Civil Engineering and Natural Hazards, University of Natural Resources and Life Sciences, Peter Jordan-Straße 70, 1190 Vienna, Austria b Department of Geography, Justus-Liebig-University Giessen, Senckenbergstraße 1, 35390 Giessen, Germany article info abstract Article history: During the penultimate glaciation vast areas of the Alps were glaciated, with piedmont glaciers pro- Available online 6 November 2014 truding into the foreland. In the easternmost part of the northward draining valleys of the Alps, the glaciers did not reach the foreland, but formed valley glaciers confined by the mountainous terrain. This Keywords: also applies to the Ybbs valley, where samples for luminescence dating out of glaciofluvial gravel ac- Penultimate glaciation cumulations were taken at three locations along the present day river course. In a highly dynamic Deglaciation depositional environment, such as a glacier-fed river system, incomplete resetting of the luminescence Luminescence dating signal is possible, in particular when transport distances are short. In such cases, quartz usually is the Eastern Alps Glaciofluvial deposits preferred mineral over feldspar, especially if dose rates are low and may theoretically allow obtaining quartz ages beyond 150 ka. Because previous research has shown, and as corroborated within this study, quartz from the research area exhibits analytical problems in the high age range. Therefore luminescence properties of coarse grain (100e200 mm) quartz and in addition K-rich feldspar were investigated with the aim to reconstruct the chronology of the glacial processes within the Ybbs catchment area.
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