The influence of high-latitude flux lobes on the Holocene paleomagnetic record of IODP Site U1305 and the northern North Atlantic
International audience Paleomagnetic analysis and radiocarbon dating of an expanded Holocene deep‐sea sediment sequence recovered by Integrated Ocean Drilling Program (IODP) Expedition 303 from Labrador Sea Site U1305 (Lat.: 57°28.5 N, Long.: 48°31.8 W, water depth 3459 m) provides insights into mec...
Published in: | Geochemistry, Geophysics, Geosystems |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Subjects: | |
Online Access: | https://hal.science/hal-03118203 https://hal.science/hal-03118203/document https://hal.science/hal-03118203/file/ggge.20272.pdf https://doi.org/10.1002/ggge.20272 |
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ftuniversailles:oai:HAL:hal-03118203v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
paleomagnetism North Atlantic paleointensity [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
paleomagnetism North Atlantic paleointensity [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Stoner, Joseph Channell, James Mazaud, Alain Strano, Sarah Xuan, Chuang The influence of high-latitude flux lobes on the Holocene paleomagnetic record of IODP Site U1305 and the northern North Atlantic |
topic_facet |
paleomagnetism North Atlantic paleointensity [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience Paleomagnetic analysis and radiocarbon dating of an expanded Holocene deep‐sea sediment sequence recovered by Integrated Ocean Drilling Program (IODP) Expedition 303 from Labrador Sea Site U1305 (Lat.: 57°28.5 N, Long.: 48°31.8 W, water depth 3459 m) provides insights into mechanisms that drive both paleomagnetic secular variation (PSV) and magnetization acquisition in deep‐sea sediments. Seventeen radiocarbon dates on planktonic foraminifera define postglacial (ca. 8 ka) sedimentation rates as ranging from 35 to > 90 cm/kyr. Alternating field (AF) demagnetization of u‐channel samples show that these homogeneous sediments preserve a strong, stable, and consistently well‐defined component magnetization. Normalized remanence records pass reliability criteria for relative paleointensity (RPI) estimates. Assuming that the age of magnetization is most accurately defined by well dated PSV records with the highest sedimentation rates, allows us to estimate and correct for temporal offsets at Site U1305 interpreted to result from postdepositional remanence acquisition at a depth of ∼20 cm. Comparisons indicate that the northern North Atlantic PSV and RPI records are more consistent with European than North American records, and the evolution of virtual geomagnetic poles (VGP) are temporally and longitudinally similar to global reconstructions, though with much larger latitudinal variation. The largest deviations from a geocentric axial dipole (GAD) are observed during times of the highest intensities, in contrast to the usual assumption. These observations are consistent with the idea that PSV in the North Atlantic and elsewhere during the Holocene results from temporal oscillations of high‐latitude flux concentrations at a few recurrent locations. |
author2 |
Oregon State University (OSU) University of Florida Gainesville (UF) Climat et Magnétisme (CLIMAG) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) College of Earth, Ocean and Atmospheric Sciences Corvallis (CEOAS) |
format |
Article in Journal/Newspaper |
author |
Stoner, Joseph Channell, James Mazaud, Alain Strano, Sarah Xuan, Chuang |
author_facet |
Stoner, Joseph Channell, James Mazaud, Alain Strano, Sarah Xuan, Chuang |
author_sort |
Stoner, Joseph |
title |
The influence of high-latitude flux lobes on the Holocene paleomagnetic record of IODP Site U1305 and the northern North Atlantic |
title_short |
The influence of high-latitude flux lobes on the Holocene paleomagnetic record of IODP Site U1305 and the northern North Atlantic |
title_full |
The influence of high-latitude flux lobes on the Holocene paleomagnetic record of IODP Site U1305 and the northern North Atlantic |
title_fullStr |
The influence of high-latitude flux lobes on the Holocene paleomagnetic record of IODP Site U1305 and the northern North Atlantic |
title_full_unstemmed |
The influence of high-latitude flux lobes on the Holocene paleomagnetic record of IODP Site U1305 and the northern North Atlantic |
title_sort |
influence of high-latitude flux lobes on the holocene paleomagnetic record of iodp site u1305 and the northern north atlantic |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-03118203 https://hal.science/hal-03118203/document https://hal.science/hal-03118203/file/ggge.20272.pdf https://doi.org/10.1002/ggge.20272 |
genre |
Labrador Sea North Atlantic Planktonic foraminifera |
genre_facet |
Labrador Sea North Atlantic Planktonic foraminifera |
op_source |
ISSN: 1525-2027 EISSN: 1525-2027 Geochemistry, Geophysics, Geosystems https://hal.science/hal-03118203 Geochemistry, Geophysics, Geosystems, 2013, 14 (10), pp.4623-4646. ⟨10.1002/ggge.20272⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ggge.20272 hal-03118203 https://hal.science/hal-03118203 https://hal.science/hal-03118203/document https://hal.science/hal-03118203/file/ggge.20272.pdf doi:10.1002/ggge.20272 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/ggge.20272 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
14 |
container_issue |
10 |
container_start_page |
4623 |
op_container_end_page |
4646 |
_version_ |
1797586505079717888 |
spelling |
ftuniversailles:oai:HAL:hal-03118203v1 2024-04-28T08:27:40+00:00 The influence of high-latitude flux lobes on the Holocene paleomagnetic record of IODP Site U1305 and the northern North Atlantic Stoner, Joseph Channell, James Mazaud, Alain Strano, Sarah Xuan, Chuang Oregon State University (OSU) University of Florida Gainesville (UF) Climat et Magnétisme (CLIMAG) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) College of Earth, Ocean and Atmospheric Sciences Corvallis (CEOAS) 2013 https://hal.science/hal-03118203 https://hal.science/hal-03118203/document https://hal.science/hal-03118203/file/ggge.20272.pdf https://doi.org/10.1002/ggge.20272 en eng HAL CCSD AGU and the Geochemical Society info:eu-repo/semantics/altIdentifier/doi/10.1002/ggge.20272 hal-03118203 https://hal.science/hal-03118203 https://hal.science/hal-03118203/document https://hal.science/hal-03118203/file/ggge.20272.pdf doi:10.1002/ggge.20272 info:eu-repo/semantics/OpenAccess ISSN: 1525-2027 EISSN: 1525-2027 Geochemistry, Geophysics, Geosystems https://hal.science/hal-03118203 Geochemistry, Geophysics, Geosystems, 2013, 14 (10), pp.4623-4646. ⟨10.1002/ggge.20272⟩ paleomagnetism North Atlantic paleointensity [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2013 ftuniversailles https://doi.org/10.1002/ggge.20272 2024-04-04T17:35:12Z International audience Paleomagnetic analysis and radiocarbon dating of an expanded Holocene deep‐sea sediment sequence recovered by Integrated Ocean Drilling Program (IODP) Expedition 303 from Labrador Sea Site U1305 (Lat.: 57°28.5 N, Long.: 48°31.8 W, water depth 3459 m) provides insights into mechanisms that drive both paleomagnetic secular variation (PSV) and magnetization acquisition in deep‐sea sediments. Seventeen radiocarbon dates on planktonic foraminifera define postglacial (ca. 8 ka) sedimentation rates as ranging from 35 to > 90 cm/kyr. Alternating field (AF) demagnetization of u‐channel samples show that these homogeneous sediments preserve a strong, stable, and consistently well‐defined component magnetization. Normalized remanence records pass reliability criteria for relative paleointensity (RPI) estimates. Assuming that the age of magnetization is most accurately defined by well dated PSV records with the highest sedimentation rates, allows us to estimate and correct for temporal offsets at Site U1305 interpreted to result from postdepositional remanence acquisition at a depth of ∼20 cm. Comparisons indicate that the northern North Atlantic PSV and RPI records are more consistent with European than North American records, and the evolution of virtual geomagnetic poles (VGP) are temporally and longitudinally similar to global reconstructions, though with much larger latitudinal variation. The largest deviations from a geocentric axial dipole (GAD) are observed during times of the highest intensities, in contrast to the usual assumption. These observations are consistent with the idea that PSV in the North Atlantic and elsewhere during the Holocene results from temporal oscillations of high‐latitude flux concentrations at a few recurrent locations. Article in Journal/Newspaper Labrador Sea North Atlantic Planktonic foraminifera Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Geochemistry, Geophysics, Geosystems 14 10 4623 4646 |