Universität zu Köln

Gromig, Raphael ORCID: 0000-0001-9217-4259, Wagner, Bernd ORCID: 0000-0002-1369-7893, Wennrich, Volker ORCID: 0000-0003-3617-1963, Fedorov, Grigory ORCID: 0000-0003-2269-4501, Savelieva, Larisa, Lebas, Elodie ORCID: 0000-0003-1617-143X, Krastel, Sebastian, Brill, Dominik ORCID: 0000-0001-8637-4641, Andreev, Andrei ORCID: 0000-0002-8745-9636, Subetto, Dmitry ORCID: 0000-0002-3585-8598 and Melles, Martin (2019). Deglaciation history of Lake Ladoga (northwestern Russia) based on varved sediments. Boreas, 48 (2). S. 330 - 349. HOBOKEN: WILEY. ISSN 1502-3885

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Abstract

Lake Ladoga in northwestern Russia is Europe's largest lake. The postglacial history of the Ladoga basin is for the first time documented continuously with high temporal resolution in the upper 13.3m of a sediment core (Co1309) from the northwestern part of the lake. We applied a multiproxy approach including radiographic imaging, (bio-)geochemical and granulometric analyses. Age control was established combining radiocarbon dating with varve chronology, the latter anchored to a correlated radiocarbon age from a lake close by. The age-depth model reveals the onset of glacial varve sedimentation at 13910 +/- 140cal. a BP, when Lake Ladoga was part of the Baltic Ice Lake. Linear extrapolation of published retreat rates of the Scandinavian Ice Sheet provides a formation age of the Luga moraine close to Lake Ladoga's southern shore of 14.5-15.9cal. ka BP, older than previously assumed. Varve sedimentation covers the BOlling/AllerOd interstadial, the Younger Dryas stadial and the Early Holocene. Varve-thickness variations, conjoined with grain-size and geochemical variations, inform about the relative position of the Scandinavian Ice Sheet and the climate during the deglaciation phase. The upper limit of the varved succession marks the change from glaciolacustrine to normal lacustrine sedimentation and post-dates the drainage of the Baltic Ice Lake as well as the formation of the Salpausselka II moraine north of Lake Ladoga, by c.250years. The Holocene sediment record is divided into three periods in the following order: (i) a lower transition zone between the Holocene boundary and c.9.5cal. ka BP, characterized by mostly massive sediments with low organic content, (ii) a phase with increased organic content from c.9.5 to 4.5cal. ka BP corresponding to the Holocene Thermal Maximum, and (iii) a phase with relatively stable sedimentation in a lacustrine environment from c.4.5cal. ka BP until present.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Gromig, Raphael UNSPECIFIED orcid.org/0000-0001-9217-4259 UNSPECIFIED Wagner, Bernd UNSPECIFIED orcid.org/0000-0002-1369-7893 UNSPECIFIED Wennrich, Volker UNSPECIFIED orcid.org/0000-0003-3617-1963 UNSPECIFIED Fedorov, Grigory UNSPECIFIED orcid.org/0000-0003-2269-4501 UNSPECIFIED Savelieva, Larisa UNSPECIFIED UNSPECIFIED UNSPECIFIED Lebas, Elodie UNSPECIFIED orcid.org/0000-0003-1617-143X UNSPECIFIED Krastel, Sebastian UNSPECIFIED UNSPECIFIED UNSPECIFIED Brill, Dominik UNSPECIFIED orcid.org/0000-0001-8637-4641 UNSPECIFIED Andreev, Andrei UNSPECIFIED orcid.org/0000-0002-8745-9636 UNSPECIFIED Subetto, Dmitry UNSPECIFIED orcid.org/0000-0002-3585-8598 UNSPECIFIED Melles, Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-152129
DOI:	10.1111/bor.12379
Journal or Publication Title:	Boreas
Volume:	48
Number:	2
Page Range:	S. 330 - 349
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 SCANDINAVIAN ICE-SHEET; LAST GLACIAL MAXIMUM; TEMPERATURE RECONSTRUCTION; SOUTHEASTERN SECTOR; HOLOCENE CLIMATE; OXYGEN-ISOTOPE; BALTIC SEA; AGE; RECORDS; SINGLE Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15212