Results and challenges from luminescence dating of Romanian loess

Alida Timar-Gabor1, Stefan Vasiliniuc1, D.A.G. Vandenberghe2, D. Constantin1, Cristian G. Panaiotu3, Daniel Veres
1 Faculty of Environmental Science and Engineering, Babes-Bolyai University, Cluj Napoca, Romania
2 Laboratory of Mineralogy and Petrology (Luminescence Research Group), Department of Geology and Soil Science, Ghent University, Belgium
3 Faculty of Physics, University of Bucharest, Romania

P 2.17 in Löss und terrestrische Archive

We present an overview of our five years research in establishing a reliable chronological framework of some of the most important loess-palaeosol sequences in SE Romania. Optically stimulated luminescence (OSL) ages obtained for three representative sites (Mircea Voda, Mostistea, Costinesti) using polymineral fine grains and different grain-size fractions of quartz are discussed from chronological and methodological perspectives. The potential of luminescence as a dating tool is demonstrated through an excellent agreement obtained between fine quartz OSL and feldspars (polymineral fine grains - post-IR IRSL) ages obtained at Mircea Voda as well as the excellent results obtained using different grain sizes of quartz at Caciulatesti site (SW Romania), where independent age control is available through the existence of a tephra layer assigned to Campanian Ignimbrite Y5 eruption. However, while our studies support a revision of the formerly established chronology, intriguing evidence is presented showing that dating different grain-size fractions of quartz can lead to discrepant depositional ages.

Letzte Änderung 09.08.2012