A High‐Resolution Geomagnetic Relative Paleointensity Record From the Arctic Ocean Deep‐Water Gateway Deposits During the Last 60 kyr
We present a paleomagnetic and rock magnetic data set from two long sediment cores collected from Bellsund and Isfjorden contourite drifts located on the eastern side of the Fram Strait (western Spitsbergen margin). The data set gave the opportunity to define the behavior of the past geomagnetic fie...
Published in: | Geochemistry, Geophysics, Geosystems |
---|---|
Main Authors: | , , , , , , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2019
|
Subjects: | |
Online Access: | http://hdl.handle.net/11568/991971 https://doi.org/10.1029/2018GC007955 |
id |
ftunivpisairis:oai:arpi.unipi.it:11568/991971 |
---|---|
record_format |
openpolar |
spelling |
ftunivpisairis:oai:arpi.unipi.it:11568/991971 2024-04-14T08:08:18+00:00 A High‐Resolution Geomagnetic Relative Paleointensity Record From the Arctic Ocean Deep‐Water Gateway Deposits During the Last 60 kyr Caricchi C. Lucchi R. G. Sagnotti L. Macrì P. Di Roberto A. Del Carlo P. Husum K. Laberg JS. Morigi C. Caricchi, C. Lucchi, R. G. Sagnotti, L. Macrì, P. Di Roberto, A. Del Carlo, P. Husum, K. Laberg, Js. Morigi, C. 2019 ELETTRONICO http://hdl.handle.net/11568/991971 https://doi.org/10.1029/2018GC007955 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000471599700011 volume:20 issue:5 firstpage:1 lastpage:23 numberofpages:23 journal:GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS http://hdl.handle.net/11568/991971 doi:10.1029/2018GC007955 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85066909773 paleomagnetism paleosecular variation Fram Strait cryptotephra meltwater pulses Heinrich events info:eu-repo/semantics/article 2019 ftunivpisairis https://doi.org/10.1029/2018GC007955 2024-03-21T19:11:28Z We present a paleomagnetic and rock magnetic data set from two long sediment cores collected from Bellsund and Isfjorden contourite drifts located on the eastern side of the Fram Strait (western Spitsbergen margin). The data set gave the opportunity to define the behavior of the past geomagnetic field at high latitude and to constrain the palaeoclimatic events that occurred in a time framework spanning marine isotope stage 3 to the Holocene. A high‐resolution age model was reconstructed by coupling 26 radiocarbon ages and high‐resolution relative paleointensity and paleosecular variation of the geomagnetic field records for the last 60 kyr. We show the variation of the geomagnetic field at high latitudes, pointing out variability during periods of regular paleosecular variation (normal polarity) as well as during the most recent geomagnetic excursions, and we provide a high‐resolution record of the Laschamps excursion. Cross‐cores correlation allowed us to outline major, climate‐related, sedimentary changes in the analyzed stratigraphic sequence that includes the meltwater events MWP‐1a and MWP‐19ky, and the Heinrich‐like events H1, H2, H4, and H6. This contribution confirms that rock magnetic and paleomagnetic analysis can be successfully used as a correlation and dating tool for sedimentary successions at high latitudes, where accelerator mass spectrometry dates and oxygen isotope analyses are often difficult to obtain for the scarcity of calcareous microfossils and the uncertainties related to data calibration may be significant, as well as the complexity of water mass characteristics and dynamics through climate changes. Article in Journal/Newspaper Arctic Arctic Ocean Bellsund Fram Strait Isfjord* Isfjorden Spitsbergen ARPI - Archivio della Ricerca dell'Università di Pisa Arctic Arctic Ocean Bellsund ENVELOPE(14.226,14.226,77.662,77.662) Geochemistry, Geophysics, Geosystems |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
paleomagnetism paleosecular variation Fram Strait cryptotephra meltwater pulses Heinrich events |
spellingShingle |
paleomagnetism paleosecular variation Fram Strait cryptotephra meltwater pulses Heinrich events Caricchi C. Lucchi R. G. Sagnotti L. Macrì P. Di Roberto A. Del Carlo P. Husum K. Laberg JS. Morigi C. A High‐Resolution Geomagnetic Relative Paleointensity Record From the Arctic Ocean Deep‐Water Gateway Deposits During the Last 60 kyr |
topic_facet |
paleomagnetism paleosecular variation Fram Strait cryptotephra meltwater pulses Heinrich events |
description |
We present a paleomagnetic and rock magnetic data set from two long sediment cores collected from Bellsund and Isfjorden contourite drifts located on the eastern side of the Fram Strait (western Spitsbergen margin). The data set gave the opportunity to define the behavior of the past geomagnetic field at high latitude and to constrain the palaeoclimatic events that occurred in a time framework spanning marine isotope stage 3 to the Holocene. A high‐resolution age model was reconstructed by coupling 26 radiocarbon ages and high‐resolution relative paleointensity and paleosecular variation of the geomagnetic field records for the last 60 kyr. We show the variation of the geomagnetic field at high latitudes, pointing out variability during periods of regular paleosecular variation (normal polarity) as well as during the most recent geomagnetic excursions, and we provide a high‐resolution record of the Laschamps excursion. Cross‐cores correlation allowed us to outline major, climate‐related, sedimentary changes in the analyzed stratigraphic sequence that includes the meltwater events MWP‐1a and MWP‐19ky, and the Heinrich‐like events H1, H2, H4, and H6. This contribution confirms that rock magnetic and paleomagnetic analysis can be successfully used as a correlation and dating tool for sedimentary successions at high latitudes, where accelerator mass spectrometry dates and oxygen isotope analyses are often difficult to obtain for the scarcity of calcareous microfossils and the uncertainties related to data calibration may be significant, as well as the complexity of water mass characteristics and dynamics through climate changes. |
author2 |
Caricchi, C. Lucchi, R. G. Sagnotti, L. Macrì, P. Di Roberto, A. Del Carlo, P. Husum, K. Laberg, Js. Morigi, C. |
format |
Article in Journal/Newspaper |
author |
Caricchi C. Lucchi R. G. Sagnotti L. Macrì P. Di Roberto A. Del Carlo P. Husum K. Laberg JS. Morigi C. |
author_facet |
Caricchi C. Lucchi R. G. Sagnotti L. Macrì P. Di Roberto A. Del Carlo P. Husum K. Laberg JS. Morigi C. |
author_sort |
Caricchi C. |
title |
A High‐Resolution Geomagnetic Relative Paleointensity Record From the Arctic Ocean Deep‐Water Gateway Deposits During the Last 60 kyr |
title_short |
A High‐Resolution Geomagnetic Relative Paleointensity Record From the Arctic Ocean Deep‐Water Gateway Deposits During the Last 60 kyr |
title_full |
A High‐Resolution Geomagnetic Relative Paleointensity Record From the Arctic Ocean Deep‐Water Gateway Deposits During the Last 60 kyr |
title_fullStr |
A High‐Resolution Geomagnetic Relative Paleointensity Record From the Arctic Ocean Deep‐Water Gateway Deposits During the Last 60 kyr |
title_full_unstemmed |
A High‐Resolution Geomagnetic Relative Paleointensity Record From the Arctic Ocean Deep‐Water Gateway Deposits During the Last 60 kyr |
title_sort |
high‐resolution geomagnetic relative paleointensity record from the arctic ocean deep‐water gateway deposits during the last 60 kyr |
publishDate |
2019 |
url |
http://hdl.handle.net/11568/991971 https://doi.org/10.1029/2018GC007955 |
long_lat |
ENVELOPE(14.226,14.226,77.662,77.662) |
geographic |
Arctic Arctic Ocean Bellsund |
geographic_facet |
Arctic Arctic Ocean Bellsund |
genre |
Arctic Arctic Ocean Bellsund Fram Strait Isfjord* Isfjorden Spitsbergen |
genre_facet |
Arctic Arctic Ocean Bellsund Fram Strait Isfjord* Isfjorden Spitsbergen |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000471599700011 volume:20 issue:5 firstpage:1 lastpage:23 numberofpages:23 journal:GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS http://hdl.handle.net/11568/991971 doi:10.1029/2018GC007955 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85066909773 |
op_doi |
https://doi.org/10.1029/2018GC007955 |
container_title |
Geochemistry, Geophysics, Geosystems |
_version_ |
1796305742076051456 |