Universität zu Köln

Lebas, Elodie ORCID: 0000-0003-1617-143X, Krastel, Sebastian, Wagner, Bernd ORCID: 0000-0002-1369-7893, Gromig, Raphael ORCID: 0000-0001-9217-4259, Fedorov, Grigory ORCID: 0000-0003-2269-4501, Baumer, Marlene, Kostromina, Natalia ORCID: 0000-0003-2681-0565 and Haflidason, Haflidi (2019). Seismic stratigraphical record of Lake Levinson-Lessing, Taymyr Peninsula: evidence for ice-sheet dynamics and lake-level fluctuations since the Early Weichselian. Boreas, 48 (2). S. 470 - 488. HOBOKEN: WILEY. ISSN 1502-3885

Full text not available from this repository.

Abstract

A multi-channel, high-resolution seismic reflection survey using a Micro-GI airgun was carried out in the framework of the Russian-German project PLOT (Paleolimnological Transect) on Lake Levinson-Lessing, Taymyr Peninsula, in 2016. In total, similar to 70km of seismic reflection profiles revealed in unprecedented detail the glacial and postglacial sedimentary infill of the lake basin. Five main seismic units have been recognized and interpreted as glacial (Unit V), subglacial and proglacial (Unit IV), marine (Unit III), fluvial-lacustrine (Unit II) and lacustrine (Unit I) sediments. Of particular significance are imbricated, south-orientated structures present in the southernmost part of the lake basin within Unit V and a large topographic ridge recognized in front of those structures. We interpret these structures as push moraines and an end moraine, respectively, left by the glacier after its retreat. The depositional pattern of the units above the moraines documents past lake-level fluctuations. We interpret Unit IV, Unit III and Unit I as highstand deposits, and Unit II as lowstand deposits. Gas-charged sediments dominate the northern part of the lake basin, whilst they occur only sporadically and in limited spatial extent in the central and southern parts of the lake. In the latter areas, the seismic and echo-sounder data suggest recent tectonic activity. Our study contributes to the reconstruction of environmental conditions in the Taymyr Peninsula directly following the Early Weichselian deglaciation and shows that deep tectonic lake basins affected by several glaciations can preserve important palaeoenvironmental records, which contributes significantly to our understanding of palaeoenvironmental changes in the Taymyr Peninsula and the central Russian Arctic.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Lebas, Elodie UNSPECIFIED orcid.org/0000-0003-1617-143X UNSPECIFIED Krastel, Sebastian UNSPECIFIED UNSPECIFIED UNSPECIFIED Wagner, Bernd UNSPECIFIED orcid.org/0000-0002-1369-7893 UNSPECIFIED Gromig, Raphael UNSPECIFIED orcid.org/0000-0001-9217-4259 UNSPECIFIED Fedorov, Grigory UNSPECIFIED orcid.org/0000-0003-2269-4501 UNSPECIFIED Baumer, Marlene UNSPECIFIED UNSPECIFIED UNSPECIFIED Kostromina, Natalia UNSPECIFIED orcid.org/0000-0003-2681-0565 UNSPECIFIED Haflidason, Haflidi UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-152179
DOI:	10.1111/bor.12381
Journal or Publication Title:	Boreas
Volume:	48
Number:	2
Page Range:	S. 470 - 488
Date:	2019
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1502-3885
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Geosciences > Institute of Geology and Mineralog
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EAST-AFRICA; CLIMATE; EVOLUTION; HISTORY; SEDIMENTARY Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15217