Postglacial sedimentary processes on the Storfjorden and Kveithola trough mouth fans: Significance of extreme glacimarine sedimentation
Lucchi, Renata G. . et al.-- 18 pages, 9 figures, 2 tables The depositional history of the Storfjorden and Kveithola trough-mouth fans (TMFs) in the northwestern Barents Sea has been investigated within two coordinated Spanish and Italian projects in the framework of the International Polar Year (IP...
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Online Access: | http://hdl.handle.net/10261/89917 https://doi.org/10.1016/j.gloplacha.2013.10.008 |
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ftcsic:oai:digital.csic.es:10261/89917 2024-02-11T10:02:27+01:00 Postglacial sedimentary processes on the Storfjorden and Kveithola trough mouth fans: Significance of extreme glacimarine sedimentation Lucchi, Renata G. Urgeles, Roger 2013-12 http://hdl.handle.net/10261/89917 https://doi.org/10.1016/j.gloplacha.2013.10.008 en eng Elsevier https://doi.org/10.1016/j.gloplacha.2013.10.008 doi:10.1016/j.gloplacha.2013.10.008 issn: 0921-8181 Global and Planetary Change 111: 309-326 (2013) http://hdl.handle.net/10261/89917 open LGM Sedimentary processes Meltwater plumes Gullies MWP-1a Barents Sea artÃculo http://purl.org/coar/resource_type/c_6501 2013 ftcsic https://doi.org/10.1016/j.gloplacha.2013.10.008 2024-01-16T09:55:36Z Lucchi, Renata G. . et al.-- 18 pages, 9 figures, 2 tables The depositional history of the Storfjorden and Kveithola trough-mouth fans (TMFs) in the northwestern Barents Sea has been investigated within two coordinated Spanish and Italian projects in the framework of the International Polar Year (IPY) Activity 367, NICE STREAMS. The investigation has been conducted using a multidisciplinary approach to the study of sediment cores positioned on high-resolution multibeam bathymetry and TOPAS/CHIRP sub-bottom profiles.Core correlation and the age model were based on 27 AMS 14C samples, rock magnetic parameters, lithofacies sequences, and the presence of marker beds including two oxidized layers marking the post Last Glacial Maximum (LGM) inception of deglaciation (OX-2) and the Younger Dryas cold climatic event (OX-1).Sediment facies analysis allowed the distinction of a number of depositional processes whose onset appears closely related to ice stream dynamics and oceanographic patterns in response to climate change. The glacigenic diamicton with low water content, high density, and high shear strength, deposited during glacial maxima, indicates ice streams grounded at the shelf edge. Massive release of IRD occurred at the inception of deglaciation in response to increased calving rates with possible outer ice streams lift off and collapse. The presence of a several-meter-thick sequence of interlaminated sediments deposited by subglacial outbursts of turbid meltwater (plumites) indicates rapid ice streams' melting and retreat. Crudely-layered and heavily-bioturbated sediments were deposited by contour currents under climatic/environmental conditions favorable to bioproductivity.The extreme sedimentation rate of 3.4cma-1 calculated for the plumites from the upper-slope area indicates a massive, nearly instantaneous (less than 150years), terrigenous input corresponding to an outstanding meltwater event. We propose these interlaminated sediments to represent the high-latitude marine record of MeltWater Pulse 1a ... Article in Journal/Newspaper Barents Sea International Polar Year IPY Digital.CSIC (Spanish National Research Council) Barents Sea Global and Planetary Change 111 309 326 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
LGM Sedimentary processes Meltwater plumes Gullies MWP-1a Barents Sea |
spellingShingle |
LGM Sedimentary processes Meltwater plumes Gullies MWP-1a Barents Sea Lucchi, Renata G. Urgeles, Roger Postglacial sedimentary processes on the Storfjorden and Kveithola trough mouth fans: Significance of extreme glacimarine sedimentation |
topic_facet |
LGM Sedimentary processes Meltwater plumes Gullies MWP-1a Barents Sea |
description |
Lucchi, Renata G. . et al.-- 18 pages, 9 figures, 2 tables The depositional history of the Storfjorden and Kveithola trough-mouth fans (TMFs) in the northwestern Barents Sea has been investigated within two coordinated Spanish and Italian projects in the framework of the International Polar Year (IPY) Activity 367, NICE STREAMS. The investigation has been conducted using a multidisciplinary approach to the study of sediment cores positioned on high-resolution multibeam bathymetry and TOPAS/CHIRP sub-bottom profiles.Core correlation and the age model were based on 27 AMS 14C samples, rock magnetic parameters, lithofacies sequences, and the presence of marker beds including two oxidized layers marking the post Last Glacial Maximum (LGM) inception of deglaciation (OX-2) and the Younger Dryas cold climatic event (OX-1).Sediment facies analysis allowed the distinction of a number of depositional processes whose onset appears closely related to ice stream dynamics and oceanographic patterns in response to climate change. The glacigenic diamicton with low water content, high density, and high shear strength, deposited during glacial maxima, indicates ice streams grounded at the shelf edge. Massive release of IRD occurred at the inception of deglaciation in response to increased calving rates with possible outer ice streams lift off and collapse. The presence of a several-meter-thick sequence of interlaminated sediments deposited by subglacial outbursts of turbid meltwater (plumites) indicates rapid ice streams' melting and retreat. Crudely-layered and heavily-bioturbated sediments were deposited by contour currents under climatic/environmental conditions favorable to bioproductivity.The extreme sedimentation rate of 3.4cma-1 calculated for the plumites from the upper-slope area indicates a massive, nearly instantaneous (less than 150years), terrigenous input corresponding to an outstanding meltwater event. We propose these interlaminated sediments to represent the high-latitude marine record of MeltWater Pulse 1a ... |
format |
Article in Journal/Newspaper |
author |
Lucchi, Renata G. Urgeles, Roger |
author_facet |
Lucchi, Renata G. Urgeles, Roger |
author_sort |
Lucchi, Renata G. |
title |
Postglacial sedimentary processes on the Storfjorden and Kveithola trough mouth fans: Significance of extreme glacimarine sedimentation |
title_short |
Postglacial sedimentary processes on the Storfjorden and Kveithola trough mouth fans: Significance of extreme glacimarine sedimentation |
title_full |
Postglacial sedimentary processes on the Storfjorden and Kveithola trough mouth fans: Significance of extreme glacimarine sedimentation |
title_fullStr |
Postglacial sedimentary processes on the Storfjorden and Kveithola trough mouth fans: Significance of extreme glacimarine sedimentation |
title_full_unstemmed |
Postglacial sedimentary processes on the Storfjorden and Kveithola trough mouth fans: Significance of extreme glacimarine sedimentation |
title_sort |
postglacial sedimentary processes on the storfjorden and kveithola trough mouth fans: significance of extreme glacimarine sedimentation |
publisher |
Elsevier |
publishDate |
2013 |
url |
http://hdl.handle.net/10261/89917 https://doi.org/10.1016/j.gloplacha.2013.10.008 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea International Polar Year IPY |
genre_facet |
Barents Sea International Polar Year IPY |
op_relation |
https://doi.org/10.1016/j.gloplacha.2013.10.008 doi:10.1016/j.gloplacha.2013.10.008 issn: 0921-8181 Global and Planetary Change 111: 309-326 (2013) http://hdl.handle.net/10261/89917 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.gloplacha.2013.10.008 |
container_title |
Global and Planetary Change |
container_volume |
111 |
container_start_page |
309 |
op_container_end_page |
326 |
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1790598394952024064 |