A Holocene paleosecular variation record from the northwestern Barents Sea continental margin

A high‐resolution paleomagnetic and rock magnetic study has been carried out on sediment cores collected in glaciomarine silty‐clay sequences from the continental shelf and slope of the southern Storfjorden trough‐mouth fan, on the northwestern Barents Sea continental margin. The Storfjorden sedimen...

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Published in:Geochemistry, Geophysics, Geosystems
Main Authors: Sagnotti, L., Macrì, P., Lucchi, R., Rebesco, M., Camerlenghi, A.
Other Authors: Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Lucchi, R.; Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, Sgonico, Trieste I‐34010, Italy, Rebesco, M.; Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, Sgonico, Trieste I‐34010, Italy, Camerlenghi, A.; Istitució Catalana de Recerca i Estudis Avançats, E‐08028 Barcelona, Spain, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, Sgonico, Trieste I‐34010, Italy, Istitució Catalana de Recerca i Estudis Avançats, E‐08028 Barcelona, Spain
Format: Article in Journal/Newspaper
Language:English
Published: American Geophysical Union 2011
Subjects:
Barents Sea
Holocene
Storfjorden
geomagnetic paleosecular variation
relative paleointensity
04. Solid Earth::04.05. Geomagnetism::04.05.01. Dynamo theory
04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals
04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field
04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism
Arctic
Online Access:http://hdl.handle.net/2122/7176
https://doi.org/10.1029/2011GC003810
id ftingv:oai:www.earth-prints.org:2122/7176
record_format openpolar
institution Open Polar
collection Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
op_collection_id ftingv
language English
topic Barents Sea
Holocene
Storfjorden
geomagnetic paleosecular variation
relative paleointensity
04. Solid Earth::04.05. Geomagnetism::04.05.01. Dynamo theory
04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals
04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field
04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism
spellingShingle Barents Sea
Holocene
Storfjorden
geomagnetic paleosecular variation
relative paleointensity
04. Solid Earth::04.05. Geomagnetism::04.05.01. Dynamo theory
04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals
04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field
04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism
Sagnotti, L.
Macrì, P.
Lucchi, R.
Rebesco, M.
Camerlenghi, A.
A Holocene paleosecular variation record from the northwestern Barents Sea continental margin
topic_facet Barents Sea
Holocene
Storfjorden
geomagnetic paleosecular variation
relative paleointensity
04. Solid Earth::04.05. Geomagnetism::04.05.01. Dynamo theory
04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals
04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field
04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism
description A high‐resolution paleomagnetic and rock magnetic study has been carried out on sediment cores collected in glaciomarine silty‐clay sequences from the continental shelf and slope of the southern Storfjorden trough‐mouth fan, on the northwestern Barents Sea continental margin. The Storfjorden sedimentary system was investigated during the SVAIS and EGLACOM cruises, when 10 gravity cores, with a variable length from 1.03 m to 6.41 m, were retrieved. Accelerator mass spectrometry (AMS) 14C analyses on 24 samples indicate that the cores span a time interval that includes the Holocene, the last deglaciation phase and in some cores the last glacial maximum. The sediments carry a well‐defined characteristic remanent magnetization and have a valuable potential to reconstruct the paleosecular variation (PSV) of the geomagnetic field, including relative paleointensity (RPI) variations. The paleomagnetic data allow reconstruction of past dynamics and amplitude of the geomagnetic field variations at high northern latitudes (75°–76° N). At the same time, the rock magnetic and paleomagnetic data allow a high‐resolution correlation of the sedimentary sequences and a refinement of their preliminary age models. The Holocene PSV and RPI records appear particularly sound, since they are consistent between cores and they can be correlated to the closest regional stacking curves (UK PSV, FENNOSTACK and FENNORPIS) and global geomagnetic model for the last 7 ka (CALS7k.2). The computed amplitude of secular variation is lower than that outlined by some geomagnetic field models, suggesting that it has been almost independent from latitude during the Holocene. Published Q11Z33 2.2. Laboratorio di paleomagnetismo JCR Journal restricted
author2 Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
Lucchi, R.; Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, Sgonico, Trieste I‐34010, Italy
Rebesco, M.; Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, Sgonico, Trieste I‐34010, Italy
Camerlenghi, A.; Istitució Catalana de Recerca i Estudis Avançats, E‐08028 Barcelona, Spain
Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, Sgonico, Trieste I‐34010, Italy
Istitució Catalana de Recerca i Estudis Avançats, E‐08028 Barcelona, Spain
format Article in Journal/Newspaper
author Sagnotti, L.
Macrì, P.
Lucchi, R.
Rebesco, M.
Camerlenghi, A.
author_facet Sagnotti, L.
Macrì, P.
Lucchi, R.
Rebesco, M.
Camerlenghi, A.
author_sort Sagnotti, L.
title A Holocene paleosecular variation record from the northwestern Barents Sea continental margin
title_short A Holocene paleosecular variation record from the northwestern Barents Sea continental margin
title_full A Holocene paleosecular variation record from the northwestern Barents Sea continental margin
title_fullStr A Holocene paleosecular variation record from the northwestern Barents Sea continental margin
title_full_unstemmed A Holocene paleosecular variation record from the northwestern Barents Sea continental margin
title_sort holocene paleosecular variation record from the northwestern barents sea continental margin
publisher American Geophysical Union
publishDate 2011
url http://hdl.handle.net/2122/7176
https://doi.org/10.1029/2011GC003810
geographic Barents Sea
geographic_facet Barents Sea
genre Arctic
Barents Sea
genre_facet Arctic
Barents Sea
op_relation Geochemistry Geophysics Geosystems
11/12 (2011)
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spelling ftingv:oai:www.earth-prints.org:2122/7176 2023-05-15T14:28:17+02:00 A Holocene paleosecular variation record from the northwestern Barents Sea continental margin Sagnotti, L. Macrì, P. Lucchi, R. Rebesco, M. Camerlenghi, A. Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Lucchi, R.; Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, Sgonico, Trieste I‐34010, Italy Rebesco, M.; Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, Sgonico, Trieste I‐34010, Italy Camerlenghi, A.; Istitució Catalana de Recerca i Estudis Avançats, E‐08028 Barcelona, Spain Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, Sgonico, Trieste I‐34010, Italy Istitució Catalana de Recerca i Estudis Avançats, E‐08028 Barcelona, Spain 2011-11-01 http://hdl.handle.net/2122/7176 https://doi.org/10.1029/2011GC003810 en eng American Geophysical Union Geochemistry Geophysics Geosystems 11/12 (2011) Barletta, F., G. St‐Onge, J. E. 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Geomagnetism::04.05.06. Paleomagnetism article 2011 ftingv https://doi.org/10.1029/2011GC003810 https://doi.org/10.1139/E08-039 2022-07-29T06:06:00Z A high‐resolution paleomagnetic and rock magnetic study has been carried out on sediment cores collected in glaciomarine silty‐clay sequences from the continental shelf and slope of the southern Storfjorden trough‐mouth fan, on the northwestern Barents Sea continental margin. The Storfjorden sedimentary system was investigated during the SVAIS and EGLACOM cruises, when 10 gravity cores, with a variable length from 1.03 m to 6.41 m, were retrieved. Accelerator mass spectrometry (AMS) 14C analyses on 24 samples indicate that the cores span a time interval that includes the Holocene, the last deglaciation phase and in some cores the last glacial maximum. The sediments carry a well‐defined characteristic remanent magnetization and have a valuable potential to reconstruct the paleosecular variation (PSV) of the geomagnetic field, including relative paleointensity (RPI) variations. The paleomagnetic data allow reconstruction of past dynamics and amplitude of the geomagnetic field variations at high northern latitudes (75°–76° N). At the same time, the rock magnetic and paleomagnetic data allow a high‐resolution correlation of the sedimentary sequences and a refinement of their preliminary age models. The Holocene PSV and RPI records appear particularly sound, since they are consistent between cores and they can be correlated to the closest regional stacking curves (UK PSV, FENNOSTACK and FENNORPIS) and global geomagnetic model for the last 7 ka (CALS7k.2). The computed amplitude of secular variation is lower than that outlined by some geomagnetic field models, suggesting that it has been almost independent from latitude during the Holocene. Published Q11Z33 2.2. Laboratorio di paleomagnetismo JCR Journal restricted Article in Journal/Newspaper Arctic Barents Sea Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Barents Sea Geochemistry, Geophysics, Geosystems 12 11 n/a n/a

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