Universität zu Köln

Scheidt, Stephanie ORCID: 0000-0002-9370-2700, Berg, Sonja ORCID: 0000-0002-9629-6007, Hambach, Ulrich, Klasen, Nicole, Potter, Stephan, Stolz, Alexander, Veres, Daniel, Zeeden, Christian ORCID: 0000-0002-8617-0443, Brill, Dominik ORCID: 0000-0001-8637-4641, Bruckner, Helmut, Kusch, Stephanie ORCID: 0000-0002-2708-4975, Laag, Christian, Lehmkuhl, Frank, Melles, Martin ORCID: 0000-0003-0977-9463, Monnens, Florian, Oppermann, Lukas, Rethemeyer, Janet ORCID: 0000-0001-6698-4186 and Nett, Janina J. (2021). Chronological Assessment of the Balta Alba Kurgan Loess-Paleosol Section (Romania) - A Comparative Study on Different Dating Methods for a Robust and Precise Age Model. Front. Earth Sci., 8. LAUSANNE: FRONTIERS MEDIA SA. ISSN 2296-6463

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Abstract

Loess-paleosol sequences (LPSs) are important terrestrial archives of paleoenvironmental and paleoclimatic information. One of the main obstacles for the investigation and interpretation of these archives is the uncertainty of their age-depth relationship. In this study, four different dating techniques were applied to the Late Pleistocene to Holocene LPS Balta Alba Kurgan (Romania) in order to achieve a robust chronology. Luminescence dating includes analysis of different grain-size fractions of both quartz and potassium feldspar and the best results are obtained using fine-grained quartz blue-stimulated and polymineral post-infrared infrared-stimulated luminescence measurements. Radiocarbon (C-14) dating is based on the analysis of bulk organic carbon (OC) and compound-specific radiocarbon analysis (CSRA). Bulk OC and leaf wax-derived n-alkane C-14 ages provide reliable age constraints for the past c. 25-27 kyr. CSRA reveals post-depositional incorporation of roots and microbial OC into the LPS limiting the applicability of C-14 dating in older parts of the sequence. Magnetic stratigraphy data reveal good correlation of magnetic susceptibility and the relative paleointensity of the Earth's magnetic field with one another as well as reference records and regional data. In contrast, the application of paleomagnetic secular variation stratigraphy is limited by a lack of regional reference data. The identification of the Campanian Ignimbrite/Y-5 tephra layer in the outcrop provides an independent time marker against which results from the other dating methods have been tested. The most accurate age constraints from each method are used for two Bayesian age-depth modeling approaches. The systematic comparison of the individual results exemplifies the advantages and disadvantages of the respective methods. Taken as a whole, the two age-depth models agree very well, our study also demonstrates that the multi-method approach can improve the accuracy and precision of dating loess sequences.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Scheidt, Stephanie UNSPECIFIED orcid.org/0000-0002-9370-2700 UNSPECIFIED Berg, Sonja UNSPECIFIED orcid.org/0000-0002-9629-6007 UNSPECIFIED Hambach, Ulrich UNSPECIFIED UNSPECIFIED UNSPECIFIED Klasen, Nicole UNSPECIFIED UNSPECIFIED UNSPECIFIED Potter, Stephan UNSPECIFIED UNSPECIFIED UNSPECIFIED Stolz, Alexander UNSPECIFIED UNSPECIFIED UNSPECIFIED Veres, Daniel UNSPECIFIED UNSPECIFIED UNSPECIFIED Zeeden, Christian UNSPECIFIED orcid.org/0000-0002-8617-0443 UNSPECIFIED Brill, Dominik UNSPECIFIED orcid.org/0000-0001-8637-4641 UNSPECIFIED Bruckner, Helmut UNSPECIFIED UNSPECIFIED UNSPECIFIED Kusch, Stephanie UNSPECIFIED orcid.org/0000-0002-2708-4975 UNSPECIFIED Laag, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Lehmkuhl, Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED Melles, Martin UNSPECIFIED orcid.org/0000-0003-0977-9463 UNSPECIFIED Monnens, Florian UNSPECIFIED UNSPECIFIED UNSPECIFIED Oppermann, Lukas UNSPECIFIED UNSPECIFIED UNSPECIFIED Rethemeyer, Janet UNSPECIFIED orcid.org/0000-0001-6698-4186 UNSPECIFIED Nett, Janina J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-596250
DOI:	10.3389/feart.2020.598448
Journal or Publication Title:	Front. Earth Sci.
Volume:	8
Date:	2021
Publisher:	FRONTIERS MEDIA SA
Place of Publication:	LAUSANNE
ISSN:	2296-6463
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HIGH-RESOLUTION RECORD; LATE QUATERNARY LOESS; EUROPEAN LOESS; LOWER DANUBE; GEOCHEMICAL CHARACTERIZATION; MAGNETIC-SUSCEPTIBILITY; PLEISTOCENE LOESS; GLACIAL CYCLES; DEPTH MODELS; LUMINESCENCE Multiple languages Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/59625