Tephra layers are excellent time markers in paleoenvironmental archives. These can be used for correlation between different archives and give stratigraphic control independent of the applied dating techniques. Terrestrial archives such as loess-paleosol sequences are often dated by luminescence or radiocarbon dating, depending on the material available. While radiocarbon dating is only applicable for younger timescales, luminescence ages overcome this problem to a certain extent. However, they are accompanied by wider errors that are often too imprecise for some geochronological and paleoenvironmental questions. It is thus often useful to apply different dating techniques to cross-validate their results. Since tephra layers can sometimes be dated directly and very precisely (e.g. by 40Ar/39Ar dating), they can be used as a reference to validate the results of other chronological methods such as luminescence dating.
Here, we present the Stalać and the Urluia loess-paleosol sequences and their geochronological investigations. The Stalać section in southern Serbia contains the “L2-Tephra” and a cryptotephra related to the Campanian Ignimbrite/Y-5 tephra (cf. Bösken et al., 2017; Obreht et al., 2016). The L2-Tephra is preserved in several loess-paleosol sequences in southeastern Europe (cf. Laag et al., INTAV conference abstract). Its labelling is related to its deposition within the L2 loess package, usually correlated to marine isotope stage 6 (e.g. Marković et al., 2015). Furthermore, also the Urluia section contains the Campanian Ignimbrite/Y-5 tephra (Obreht et al., 2017) that is widely distributed in southeastern Europe (e.g. Fitzsimmons et al., 2013) and dated to 39.85 ± 0.14 ka (Giaccio et al., 2017). This contribution identifies challenges in dating tephra layers by luminescence dating techniques and highlights its possibilities and prospects.
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Bösken et al. intav 2018_169.pdf Accessed 33 times | Last updated 13.12.2018
Bösken, J., Klasen, N., Obreht, I., Hambach, U., Veres, D., Zeeden, C., Markovic, S., Burow, C., Brill, D., Pötter, S., Lehmkuhl, F. (2018): Chances and challenges in dating tephra marker horizons by luminescence dating techniques. INQUA–INTAV International Field Conference and Workshop, Crossing New Frontiers - Tephra Hunt in Transylvania 24.-29.06.2018
|Authors||Bösken, Janina and Klasen, Nicole and Obreht, Igor and Hambach, Ulrich and Veres, Daniel and Zeeden, Christian and Markovic, Slobodan B. and Burow, Christoph and Brill, Dominik and Pötter, Stephan and Lehmkuhl, Frank|
|Title||Chances and challenges in dating tephra marker horizons by luminescence dating techniques|
|Organization||INQUA–INTAV International Field Conference and Workshop, Crossing New Frontiers - Tephra Hunt in Transylvania 24.-29.06.2018|