Extreme depositional events on the NW-Barents Sea continental margin
Lucchi, Renata G. . et. al.-- 87° Congresso della Società Geologica Italiana e 90° Congresso della Società Italiana di Mineralogia e Petrologia, The Future of the Italian Geosciences - The Italian Geosciences of the Future, 10-12 September 2014, Milan, Italy.-- 1 page The post Last Glacial Maximum d...
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ftcsic:oai:digital.csic.es:10261/127599 2024-02-11T10:02:26+01:00 Extreme depositional events on the NW-Barents Sea continental margin Lucchi, Renata G. Urgeles, Roger Rebesco, Michele 2014-09-10 http://hdl.handle.net/10261/127599 https://doi.org/10.3301/ROL.2014.140 unknown Società Geologica Italiana https://doi.org/10.3301/ROL.2014.140 Sí issn: 2035-8008 Rendiconti Online della Società Geologica Italiana 31(Supl.1): 71 (2014) 87° Congresso della Società Geologica Italiana e 90° Congresso della Società Italiana di Mineralogia e Petrologia. Abstract Book: 71 (2014) http://hdl.handle.net/10261/127599 doi:10.3301/ROL.2014.140 none Barents Sea Plumites MWP-1a comunicación de congreso http://purl.org/coar/resource_type/c_5794 2014 ftcsic https://doi.org/10.3301/ROL.2014.140 2024-01-16T10:13:07Z Lucchi, Renata G. . et. al.-- 87° Congresso della Società Geologica Italiana e 90° Congresso della Società Italiana di Mineralogia e Petrologia, The Future of the Italian Geosciences - The Italian Geosciences of the Future, 10-12 September 2014, Milan, Italy.-- 1 page The post Last Glacial Maximum depositional history of the Storfjorden and Kveithola trough-mouth fans in the North-western 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 Sediment facies analysis allowed the distinction of a number of depositional processes whose onset appears closely related to ice stream’s dynamics, oceanographic patterns, and sea-level changes in response to climate change. Highly consolidated glacigenic diamicton, deposited during glacial maxima on the upper slope, indicating ice streams grounded at the shelf edge. Massive release of IRD was associated to increased calving rates with possible outer ice streams lift off and collapse at the inception of deglaciation. 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 deposited in the later stages of deglaciation by contour currents under climatic/environmental conditions favourable to bioproductivity. The extreme sedimentation rate of 3.4 cm a−1 calculated for the plumites from the upper-slope area indicates a massive, nearly instantaneous (less than 150 years), terrigenous input corresponding to an outstanding meltwater event. We indicate these interlaminated sediments to represent the high-latitude marine record of Meltwater Pulse 1a (MWP-1a) Peer Reviewed Conference Object Barents Sea International Polar Year IPY Digital.CSIC (Spanish National Research Council) Barents Sea Rendiconti Online della Società Geologica Italiana 31 |
institution |
Open Polar |
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Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Barents Sea Plumites MWP-1a |
spellingShingle |
Barents Sea Plumites MWP-1a Lucchi, Renata G. Urgeles, Roger Rebesco, Michele Extreme depositional events on the NW-Barents Sea continental margin |
topic_facet |
Barents Sea Plumites MWP-1a |
description |
Lucchi, Renata G. . et. al.-- 87° Congresso della Società Geologica Italiana e 90° Congresso della Società Italiana di Mineralogia e Petrologia, The Future of the Italian Geosciences - The Italian Geosciences of the Future, 10-12 September 2014, Milan, Italy.-- 1 page The post Last Glacial Maximum depositional history of the Storfjorden and Kveithola trough-mouth fans in the North-western 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 Sediment facies analysis allowed the distinction of a number of depositional processes whose onset appears closely related to ice stream’s dynamics, oceanographic patterns, and sea-level changes in response to climate change. Highly consolidated glacigenic diamicton, deposited during glacial maxima on the upper slope, indicating ice streams grounded at the shelf edge. Massive release of IRD was associated to increased calving rates with possible outer ice streams lift off and collapse at the inception of deglaciation. 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 deposited in the later stages of deglaciation by contour currents under climatic/environmental conditions favourable to bioproductivity. The extreme sedimentation rate of 3.4 cm a−1 calculated for the plumites from the upper-slope area indicates a massive, nearly instantaneous (less than 150 years), terrigenous input corresponding to an outstanding meltwater event. We indicate these interlaminated sediments to represent the high-latitude marine record of Meltwater Pulse 1a (MWP-1a) Peer Reviewed |
format |
Conference Object |
author |
Lucchi, Renata G. Urgeles, Roger Rebesco, Michele |
author_facet |
Lucchi, Renata G. Urgeles, Roger Rebesco, Michele |
author_sort |
Lucchi, Renata G. |
title |
Extreme depositional events on the NW-Barents Sea continental margin |
title_short |
Extreme depositional events on the NW-Barents Sea continental margin |
title_full |
Extreme depositional events on the NW-Barents Sea continental margin |
title_fullStr |
Extreme depositional events on the NW-Barents Sea continental margin |
title_full_unstemmed |
Extreme depositional events on the NW-Barents Sea continental margin |
title_sort |
extreme depositional events on the nw-barents sea continental margin |
publisher |
Società Geologica Italiana |
publishDate |
2014 |
url |
http://hdl.handle.net/10261/127599 https://doi.org/10.3301/ROL.2014.140 |
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/10.3301/ROL.2014.140 Sí issn: 2035-8008 Rendiconti Online della Società Geologica Italiana 31(Supl.1): 71 (2014) 87° Congresso della Società Geologica Italiana e 90° Congresso della Società Italiana di Mineralogia e Petrologia. Abstract Book: 71 (2014) http://hdl.handle.net/10261/127599 doi:10.3301/ROL.2014.140 |
op_rights |
none |
op_doi |
https://doi.org/10.3301/ROL.2014.140 |
container_title |
Rendiconti Online della Società Geologica Italiana |
container_volume |
31 |
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1790598383217410048 |