Integrated sedimentology and micropaleontology for the study of the deglaciation post LGM in the south-western Svalbard slope (Arctic Ocean)
The north-western continental margin of the Barents Sea represents the only gateway for deep-water masses moving between the North Atlantic and the Arctic Oceans. On this respect, the western Svalbard margin, located on the eastern side of the Fram Strait, represents a key area to study the paleocea...
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ftunivpisairis:oai:arpi.unipi.it:11568/840758 2024-04-14T08:07:36+00:00 Integrated sedimentology and micropaleontology for the study of the deglaciation post LGM in the south-western Svalbard slope (Arctic Ocean) Carbonara, Katia Lucchi, Renata Giulia Melis, Romana Mezgec, Karin Musco, Maria Elena Varagona, Gabriella Villa, Giuliana MORIGI, CATERINA D. Calcaterra, S. Mazzoli, F.M. Petti, B. Carmina & A. Zuccari Carbonara, Katia Lucchi, Renata Giulia Melis, Romana Mezgec, Karin Morigi, Caterina Musco, Maria Elena Varagona, Gabriella Villa, Giuliana 2016 ELETTRONICO http://hdl.handle.net/11568/840758 eng eng country:ITA ispartofbook:Volume abstract dell'88° Congresso della Società Geologica Italiana 88° Congresso della Società Geologica Italiana volume:40/2016 issue:1 journal:RENDICONTI DELLA SOCIETÀ GEOLOGICA ITALIANA http://hdl.handle.net/11568/840758 10,3301/ROL.2016.79 info:eu-repo/semantics/conferenceObject 2016 ftunivpisairis 2024-03-21T18:54:23Z The north-western continental margin of the Barents Sea represents the only gateway for deep-water masses moving between the North Atlantic and the Arctic Oceans. On this respect, the western Svalbard margin, located on the eastern side of the Fram Strait, represents a key area to study the paleoceanographic variation of the West and East Spitsbergen currents. Integrated sedimentological and micropaleontological analyses on calcareous nannofossils, diatoms, planktonic and benthonic foraminifera and clay mineral assemblages have been performed on three sediment cores, collected during the EGLACOM and CORIBAR projects from the Storfjorden-Kveithola depositional system (NW Barents Sea), to reconstruct the deep-water paleoceanographic evolution after the Last Glacial Maximum. The lithological sequence and the magnetic susceptibility are consistent between the EGLACOM and CORIBAR cores. The recovered cores contain an expanded sedimentary sequence that includes continuous Holocene interglacial sediments. The microfossils are scarce in the lithological units that represent the deglaciation after LGM and became abundant in the Holocene sequences that record a clear upswing of the North Atlantic Current (NAC) strength. Nevertheless, the benthic assemblage is indicative of non-permanently ice-covered conditions since about 16 cal ka BP. The planktonic microfossil patterns of distribution are coherent with the trend of smectite content in the clay mineral assemblage that is mainly transported by the NAC, therefore high contents are associated to a vigorous current (Junttila et al., 2010). The nannofossil assemblages during the Holocene, are dominated by Emiliania huxleyi (< 4 μm), confirming the climatic amelioration. The diatom assemblages are dominated by Chaetoceros resting spores, related to stratified waters in association with ice melting at the beginning of Holocene. The presence of the diatom Coscinodiscus spp. and a more diversified planktonic foraminiferal assemblage, with Neogloboquadrina pachyderma (s), N. ... Conference Object Arctic Arctic Ocean Barents Sea Foraminifera* Fram Strait Magnetic susceptibility Neogloboquadrina pachyderma north atlantic current North Atlantic Storfjorden Svalbard Svalbard margin Spitsbergen ARPI - Archivio della Ricerca dell'Università di Pisa Arctic Arctic Ocean Barents Sea Junttila ENVELOPE(25.017,25.017,67.850,67.850) Svalbard |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
description |
The north-western continental margin of the Barents Sea represents the only gateway for deep-water masses moving between the North Atlantic and the Arctic Oceans. On this respect, the western Svalbard margin, located on the eastern side of the Fram Strait, represents a key area to study the paleoceanographic variation of the West and East Spitsbergen currents. Integrated sedimentological and micropaleontological analyses on calcareous nannofossils, diatoms, planktonic and benthonic foraminifera and clay mineral assemblages have been performed on three sediment cores, collected during the EGLACOM and CORIBAR projects from the Storfjorden-Kveithola depositional system (NW Barents Sea), to reconstruct the deep-water paleoceanographic evolution after the Last Glacial Maximum. The lithological sequence and the magnetic susceptibility are consistent between the EGLACOM and CORIBAR cores. The recovered cores contain an expanded sedimentary sequence that includes continuous Holocene interglacial sediments. The microfossils are scarce in the lithological units that represent the deglaciation after LGM and became abundant in the Holocene sequences that record a clear upswing of the North Atlantic Current (NAC) strength. Nevertheless, the benthic assemblage is indicative of non-permanently ice-covered conditions since about 16 cal ka BP. The planktonic microfossil patterns of distribution are coherent with the trend of smectite content in the clay mineral assemblage that is mainly transported by the NAC, therefore high contents are associated to a vigorous current (Junttila et al., 2010). The nannofossil assemblages during the Holocene, are dominated by Emiliania huxleyi (< 4 μm), confirming the climatic amelioration. The diatom assemblages are dominated by Chaetoceros resting spores, related to stratified waters in association with ice melting at the beginning of Holocene. The presence of the diatom Coscinodiscus spp. and a more diversified planktonic foraminiferal assemblage, with Neogloboquadrina pachyderma (s), N. ... |
author2 |
D. Calcaterra, S. Mazzoli, F.M. Petti, B. Carmina & A. Zuccari Carbonara, Katia Lucchi, Renata Giulia Melis, Romana Mezgec, Karin Morigi, Caterina Musco, Maria Elena Varagona, Gabriella Villa, Giuliana |
format |
Conference Object |
author |
Carbonara, Katia Lucchi, Renata Giulia Melis, Romana Mezgec, Karin Musco, Maria Elena Varagona, Gabriella Villa, Giuliana MORIGI, CATERINA |
spellingShingle |
Carbonara, Katia Lucchi, Renata Giulia Melis, Romana Mezgec, Karin Musco, Maria Elena Varagona, Gabriella Villa, Giuliana MORIGI, CATERINA Integrated sedimentology and micropaleontology for the study of the deglaciation post LGM in the south-western Svalbard slope (Arctic Ocean) |
author_facet |
Carbonara, Katia Lucchi, Renata Giulia Melis, Romana Mezgec, Karin Musco, Maria Elena Varagona, Gabriella Villa, Giuliana MORIGI, CATERINA |
author_sort |
Carbonara, Katia |
title |
Integrated sedimentology and micropaleontology for the study of the deglaciation post LGM in the south-western Svalbard slope (Arctic Ocean) |
title_short |
Integrated sedimentology and micropaleontology for the study of the deglaciation post LGM in the south-western Svalbard slope (Arctic Ocean) |
title_full |
Integrated sedimentology and micropaleontology for the study of the deglaciation post LGM in the south-western Svalbard slope (Arctic Ocean) |
title_fullStr |
Integrated sedimentology and micropaleontology for the study of the deglaciation post LGM in the south-western Svalbard slope (Arctic Ocean) |
title_full_unstemmed |
Integrated sedimentology and micropaleontology for the study of the deglaciation post LGM in the south-western Svalbard slope (Arctic Ocean) |
title_sort |
integrated sedimentology and micropaleontology for the study of the deglaciation post lgm in the south-western svalbard slope (arctic ocean) |
publisher |
country:ITA |
publishDate |
2016 |
url |
http://hdl.handle.net/11568/840758 |
long_lat |
ENVELOPE(25.017,25.017,67.850,67.850) |
geographic |
Arctic Arctic Ocean Barents Sea Junttila Svalbard |
geographic_facet |
Arctic Arctic Ocean Barents Sea Junttila Svalbard |
genre |
Arctic Arctic Ocean Barents Sea Foraminifera* Fram Strait Magnetic susceptibility Neogloboquadrina pachyderma north atlantic current North Atlantic Storfjorden Svalbard Svalbard margin Spitsbergen |
genre_facet |
Arctic Arctic Ocean Barents Sea Foraminifera* Fram Strait Magnetic susceptibility Neogloboquadrina pachyderma north atlantic current North Atlantic Storfjorden Svalbard Svalbard margin Spitsbergen |
op_relation |
ispartofbook:Volume abstract dell'88° Congresso della Società Geologica Italiana 88° Congresso della Società Geologica Italiana volume:40/2016 issue:1 journal:RENDICONTI DELLA SOCIETÀ GEOLOGICA ITALIANA http://hdl.handle.net/11568/840758 10,3301/ROL.2016.79 |
_version_ |
1796305011567755264 |