Universität zu Köln

Lenz, Matthias, Lebas, Elodie, Lenz, Marlene M., Fedorov, Grigory ORCID: 0000-0003-2269-4501, Gromig, Raphael ORCID: 0000-0001-9217-4259, Kolka, Vasili, Krastel, Sebastian ORCID: 0000-0002-5899-9748, Leicher, Niklas ORCID: 0000-0002-3367-5982, Melles, Martin ORCID: 0000-0003-0977-9463 and Wagner, Bernd . Highly variable sediment deposition in Lake Imandra, NW Russia, since the Late Pleistocene. J. Quat. Sci.. HOBOKEN: WILEY. ISSN 1099-1417

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Abstract

To understand the dynamics of sediment deposition and the potential influences of complex current systems in large lakes, Lake Imandra (Kola Peninsula) has been investigated. Seismic and echo-sounder data of the central part of Bolshaya Imandra reveal the sediment architecture in unprecedented detail. In addition, the sediment core data indicate highly variable depositional processes since the Late Pleistocene. The complex morphology of the lacustrine basin favoured accumulation of sediment in depressions, where they were preserved from erosion. Three main stratigraphic units (SU I-III) were identified above the acoustic basement. The oldest SU III is best preserved along a tectonic trench and interpreted as glacial deposits partly eroded by the Scandinavian Ice Sheet during Marine Isotope Stage (MIS) 2. The overlying SU II deposits are regarded as a till related to MIS 2 glaciation. The youngest SU I represents glaciofluvial, glaciolacustrine and lacustrine sediment deposited after ice retreat. As the north-south-trending main axis of Bolshaya Imandra runs parallel to the predominant wind direction, the basin is subject to strong wind-induced surficial currents and compensatory subsurface currents. These currents occur in water depth of 0-15 and deeper than 30 m, respectively, and their velocity prevents sediment accumulation.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Lenz, Matthias UNSPECIFIED UNSPECIFIED UNSPECIFIED Lebas, Elodie UNSPECIFIED UNSPECIFIED UNSPECIFIED Lenz, Marlene M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fedorov, Grigory UNSPECIFIED orcid.org/0000-0003-2269-4501 UNSPECIFIED Gromig, Raphael UNSPECIFIED orcid.org/0000-0001-9217-4259 UNSPECIFIED Kolka, Vasili UNSPECIFIED UNSPECIFIED UNSPECIFIED Krastel, Sebastian UNSPECIFIED orcid.org/0000-0002-5899-9748 UNSPECIFIED Leicher, Niklas UNSPECIFIED orcid.org/0000-0002-3367-5982 UNSPECIFIED Melles, Martin UNSPECIFIED orcid.org/0000-0003-0977-9463 UNSPECIFIED Wagner, Bernd UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-591722
DOI:	10.1002/jqs.3353
Journal or Publication Title:	J. Quat. Sci.
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1099-1417
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SCALE LACUSTRINE DRIFTS; TREE-LINE AREA; KOLA-PENINSULA; ICE-SHEET; HOLOCENE CLIMATE; LATE-QUATERNARY; SEISMIC STRATIGRAPHY; NORTHWESTERN RUSSIA; RECORD; DEGLACIATION Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/59172