A chronology of environmental changes in the Lake Vättern basin from deglaciation to its final isolation
During and after deglaciation, Lake Vättern developed from a proglacial lake situated at the westernmost rim of the Baltic Ice Lake (BIL), into a brackish water body connecting the North Sea and the Baltic Sea, and finally into an isolated freshwater lake. Here we present geochemical and mineralogic...
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John Wiley & Sons Inc.
2018
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Online Access: | https://lup.lub.lu.se/record/54387fe4-bb45-452f-8f89-2aaa3ea6723c https://doi.org/10.1111/bor.12288 |
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ftulundlup:oai:lup.lub.lu.se:54387fe4-bb45-452f-8f89-2aaa3ea6723c 2023-05-15T16:41:16+02:00 A chronology of environmental changes in the Lake Vättern basin from deglaciation to its final isolation Swärd, Henrik O'Regan, Matt Björck, Svante Greenwood, Sarah L. Kylander, Malin E. Mörth, Carl-Magnus Pearce, Christof Jakobsson, Martin 2018-04 https://lup.lub.lu.se/record/54387fe4-bb45-452f-8f89-2aaa3ea6723c https://doi.org/10.1111/bor.12288 eng eng John Wiley & Sons Inc. https://lup.lub.lu.se/record/54387fe4-bb45-452f-8f89-2aaa3ea6723c http://dx.doi.org/10.1111/bor.12288 scopus:85031670114 Boreas; 47(2), pp 609-624 (2018) ISSN: 0300-9483 Geology contributiontojournal/article info:eu-repo/semantics/article text 2018 ftulundlup https://doi.org/10.1111/bor.12288 2023-02-01T23:36:20Z During and after deglaciation, Lake Vättern developed from a proglacial lake situated at the westernmost rim of the Baltic Ice Lake (BIL), into a brackish water body connecting the North Sea and the Baltic Sea, and finally into an isolated freshwater lake. Here we present geochemical and mineralogical data from a 70-m composite sediment core recovered in southern Lake Vättern. Together with a radiocarbon age model of this core, we are able to delineate the character and timing of the different lake stages. In addition to a common mineralogical background signature seen throughout the sediment core, the proglacial sediments bear a calcite imprint representing ice-sheet transported material from the limestone bedrock that borders the lake basin in the northeast. The proglacial fresh to brackish water transition is dated to 11 480±290 cal. a BP and is in close agreement with other regional chronologies. The brackish period lasted c. 300 years and was followed by a c. 1600 year freshwater period before the Vättern basin became isolated from the Initial Littorina Sea. Decreasing detrital input, increasing δ13C values and the appearance of diatoms in the upper 15 m of the sediment succession are interpreted as an overall increase in biological productivity. This mode of sedimentation continues until the present and is interpreted to mark the final isolation of the lake at 9530±50 cal. a BP. Consequently, the isolation of Lake Vättern was not an outcome of the Ancylus Lake regression, but rather because of ongoing continental uplift in the early Littorina period. Article in Journal/Newspaper Ice Sheet Lund University Publications (LUP) Southern Lake ENVELOPE(-94.333,-94.333,62.217,62.217) Boreas 47 2 609 624 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology |
spellingShingle |
Geology Swärd, Henrik O'Regan, Matt Björck, Svante Greenwood, Sarah L. Kylander, Malin E. Mörth, Carl-Magnus Pearce, Christof Jakobsson, Martin A chronology of environmental changes in the Lake Vättern basin from deglaciation to its final isolation |
topic_facet |
Geology |
description |
During and after deglaciation, Lake Vättern developed from a proglacial lake situated at the westernmost rim of the Baltic Ice Lake (BIL), into a brackish water body connecting the North Sea and the Baltic Sea, and finally into an isolated freshwater lake. Here we present geochemical and mineralogical data from a 70-m composite sediment core recovered in southern Lake Vättern. Together with a radiocarbon age model of this core, we are able to delineate the character and timing of the different lake stages. In addition to a common mineralogical background signature seen throughout the sediment core, the proglacial sediments bear a calcite imprint representing ice-sheet transported material from the limestone bedrock that borders the lake basin in the northeast. The proglacial fresh to brackish water transition is dated to 11 480±290 cal. a BP and is in close agreement with other regional chronologies. The brackish period lasted c. 300 years and was followed by a c. 1600 year freshwater period before the Vättern basin became isolated from the Initial Littorina Sea. Decreasing detrital input, increasing δ13C values and the appearance of diatoms in the upper 15 m of the sediment succession are interpreted as an overall increase in biological productivity. This mode of sedimentation continues until the present and is interpreted to mark the final isolation of the lake at 9530±50 cal. a BP. Consequently, the isolation of Lake Vättern was not an outcome of the Ancylus Lake regression, but rather because of ongoing continental uplift in the early Littorina period. |
format |
Article in Journal/Newspaper |
author |
Swärd, Henrik O'Regan, Matt Björck, Svante Greenwood, Sarah L. Kylander, Malin E. Mörth, Carl-Magnus Pearce, Christof Jakobsson, Martin |
author_facet |
Swärd, Henrik O'Regan, Matt Björck, Svante Greenwood, Sarah L. Kylander, Malin E. Mörth, Carl-Magnus Pearce, Christof Jakobsson, Martin |
author_sort |
Swärd, Henrik |
title |
A chronology of environmental changes in the Lake Vättern basin from deglaciation to its final isolation |
title_short |
A chronology of environmental changes in the Lake Vättern basin from deglaciation to its final isolation |
title_full |
A chronology of environmental changes in the Lake Vättern basin from deglaciation to its final isolation |
title_fullStr |
A chronology of environmental changes in the Lake Vättern basin from deglaciation to its final isolation |
title_full_unstemmed |
A chronology of environmental changes in the Lake Vättern basin from deglaciation to its final isolation |
title_sort |
chronology of environmental changes in the lake vättern basin from deglaciation to its final isolation |
publisher |
John Wiley & Sons Inc. |
publishDate |
2018 |
url |
https://lup.lub.lu.se/record/54387fe4-bb45-452f-8f89-2aaa3ea6723c https://doi.org/10.1111/bor.12288 |
long_lat |
ENVELOPE(-94.333,-94.333,62.217,62.217) |
geographic |
Southern Lake |
geographic_facet |
Southern Lake |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Boreas; 47(2), pp 609-624 (2018) ISSN: 0300-9483 |
op_relation |
https://lup.lub.lu.se/record/54387fe4-bb45-452f-8f89-2aaa3ea6723c http://dx.doi.org/10.1111/bor.12288 scopus:85031670114 |
op_doi |
https://doi.org/10.1111/bor.12288 |
container_title |
Boreas |
container_volume |
47 |
container_issue |
2 |
container_start_page |
609 |
op_container_end_page |
624 |
_version_ |
1766031694250377216 |