Evidence for multiple paleomagnetic intensity lows between 30 and 50 ka BP from a western Equatorial Pacific sedimentary sequence
A paleomagnetic study was carried out on the radiocarbon dated MD97-2134 core located in the western Equatorial Pacific (Southern Papua New Guinea margin). Rock magnetic investigations revealed changes of the magnetic mineralogy along the hemi-pelagic sedimentary sequence but the reconstruction of p...
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ftinsu:oai:HAL:hal-00869241v1 2023-12-17T10:46:42+01:00 Evidence for multiple paleomagnetic intensity lows between 30 and 50 ka BP from a western Equatorial Pacific sedimentary sequence Blanchet, Cl Thouveny, Nicolas de Garidel-Thoron, Thibault Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2006 https://hal.science/hal-00869241 https://doi.org/10.1016/j.quascirev.2005.09.001 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2005.09.001 hal-00869241 https://hal.science/hal-00869241 doi:10.1016/j.quascirev.2005.09.001 ISSN: 0277-3791 Quaternary Science Reviews https://hal.science/hal-00869241 Quaternary Science Reviews, 2006, 25 (9-10), pp.1039-1052. ⟨10.1016/j.quascirev.2005.09.001⟩ MONO LAKE EXCURSION GEOMAGNETIC MOMENT VARIATIONS NORTH-ATLANTIC PALEOINTENSITY STACK LASCHAMP EXCURSION PORTUGUESE MARGIN POLARITY EVENT SUMMER LAKE AGE RECORD Geography Physical Geosciences Multidisciplinary Physical Geography Geology 0277-3791 [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2006 ftinsu https://doi.org/10.1016/j.quascirev.2005.09.001 2023-11-22T17:23:05Z A paleomagnetic study was carried out on the radiocarbon dated MD97-2134 core located in the western Equatorial Pacific (Southern Papua New Guinea margin). Rock magnetic investigations revealed changes of the magnetic mineralogy along the hemi-pelagic sedimentary sequence but the reconstruction of past direction and relative paleointensity variations of the geomagnetic field remained feasible. Four successive paleointensity drops are recorded between 30 and 50 ka BP. The largest one is associated with an abrupt swing of declination and inclination interpreted as a smoothed signature of the Laschamp excursion (similar to 41 ka BP). The Succession of four events of weak intensity between 30 and 50 ka BP introduces a complex behaviour of the geomagnetic field in the time interval spanning over the Laschamp and the Mono Lake excursions. (c) 2005 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper North Atlantic Institut national des sciences de l'Univers: HAL-INSU Pacific Quaternary Science Reviews 25 9-10 1039 1052 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
MONO LAKE EXCURSION GEOMAGNETIC MOMENT VARIATIONS NORTH-ATLANTIC PALEOINTENSITY STACK LASCHAMP EXCURSION PORTUGUESE MARGIN POLARITY EVENT SUMMER LAKE AGE RECORD Geography Physical Geosciences Multidisciplinary Physical Geography Geology 0277-3791 [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
MONO LAKE EXCURSION GEOMAGNETIC MOMENT VARIATIONS NORTH-ATLANTIC PALEOINTENSITY STACK LASCHAMP EXCURSION PORTUGUESE MARGIN POLARITY EVENT SUMMER LAKE AGE RECORD Geography Physical Geosciences Multidisciplinary Physical Geography Geology 0277-3791 [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes Blanchet, Cl Thouveny, Nicolas de Garidel-Thoron, Thibault Evidence for multiple paleomagnetic intensity lows between 30 and 50 ka BP from a western Equatorial Pacific sedimentary sequence |
topic_facet |
MONO LAKE EXCURSION GEOMAGNETIC MOMENT VARIATIONS NORTH-ATLANTIC PALEOINTENSITY STACK LASCHAMP EXCURSION PORTUGUESE MARGIN POLARITY EVENT SUMMER LAKE AGE RECORD Geography Physical Geosciences Multidisciplinary Physical Geography Geology 0277-3791 [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
description |
A paleomagnetic study was carried out on the radiocarbon dated MD97-2134 core located in the western Equatorial Pacific (Southern Papua New Guinea margin). Rock magnetic investigations revealed changes of the magnetic mineralogy along the hemi-pelagic sedimentary sequence but the reconstruction of past direction and relative paleointensity variations of the geomagnetic field remained feasible. Four successive paleointensity drops are recorded between 30 and 50 ka BP. The largest one is associated with an abrupt swing of declination and inclination interpreted as a smoothed signature of the Laschamp excursion (similar to 41 ka BP). The Succession of four events of weak intensity between 30 and 50 ka BP introduces a complex behaviour of the geomagnetic field in the time interval spanning over the Laschamp and the Mono Lake excursions. (c) 2005 Elsevier Ltd. All rights reserved. |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Blanchet, Cl Thouveny, Nicolas de Garidel-Thoron, Thibault |
author_facet |
Blanchet, Cl Thouveny, Nicolas de Garidel-Thoron, Thibault |
author_sort |
Blanchet, Cl |
title |
Evidence for multiple paleomagnetic intensity lows between 30 and 50 ka BP from a western Equatorial Pacific sedimentary sequence |
title_short |
Evidence for multiple paleomagnetic intensity lows between 30 and 50 ka BP from a western Equatorial Pacific sedimentary sequence |
title_full |
Evidence for multiple paleomagnetic intensity lows between 30 and 50 ka BP from a western Equatorial Pacific sedimentary sequence |
title_fullStr |
Evidence for multiple paleomagnetic intensity lows between 30 and 50 ka BP from a western Equatorial Pacific sedimentary sequence |
title_full_unstemmed |
Evidence for multiple paleomagnetic intensity lows between 30 and 50 ka BP from a western Equatorial Pacific sedimentary sequence |
title_sort |
evidence for multiple paleomagnetic intensity lows between 30 and 50 ka bp from a western equatorial pacific sedimentary sequence |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00869241 https://doi.org/10.1016/j.quascirev.2005.09.001 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0277-3791 Quaternary Science Reviews https://hal.science/hal-00869241 Quaternary Science Reviews, 2006, 25 (9-10), pp.1039-1052. ⟨10.1016/j.quascirev.2005.09.001⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2005.09.001 hal-00869241 https://hal.science/hal-00869241 doi:10.1016/j.quascirev.2005.09.001 |
op_doi |
https://doi.org/10.1016/j.quascirev.2005.09.001 |
container_title |
Quaternary Science Reviews |
container_volume |
25 |
container_issue |
9-10 |
container_start_page |
1039 |
op_container_end_page |
1052 |
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1785570282117791744 |