Relative geomagnetic paleointensity of the Brunhes Chron and the Matuyama–Brunhes precursor as recorded in sediment core from Wilkes Land Basin (Antarctica)
Paleomagnetic and rock magnetic investigation was performed on the 35-m long MD03-2595 CADO (Coring Adélie Diatom Oozes) piston core recovered on the continental rise of the Wilkes Land Basin (East Antarctica). Analysis of the characteristic remanent magnetization (ChRM) inclination record indicates...
Published in: | Physics of the Earth and Planetary Interiors |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier B.V.
2009
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Online Access: | http://hdl.handle.net/2122/5555 https://doi.org/10.1016/j.pepi.2009.12.002 |
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ftingv:oai:www.earth-prints.org:2122/5555 2023-05-15T14:01:36+02:00 Relative geomagnetic paleointensity of the Brunhes Chron and the Matuyama–Brunhes precursor as recorded in sediment core from Wilkes Land Basin (Antarctica) Macrì, P. Sagnotti, L. Dinarès-Turell, J. Caburlotto, A. Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Dinarès-Turell, J.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Caburlotto, A.; Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, 34010 Sgonico, Trieste, Italy Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, 34010 Sgonico, Trieste, Italy 2009-12 http://hdl.handle.net/2122/5555 https://doi.org/10.1016/j.pepi.2009.12.002 en eng Elsevier B.V. Physics of the Earth and Planetary Interiors http://hdl.handle.net/2122/5555 doi:10.1016/j.pepi.2009.12.002 restricted Paleomagnetism Relative paleointensity Brunhes Chron Matuyama–Brunhes precursor Antarctica 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism 04. Solid Earth::04.05. Geomagnetism::04.05.07. Rock magnetism article 2009 ftingv https://doi.org/10.1016/j.pepi.2009.12.002 2022-07-29T06:05:28Z Paleomagnetic and rock magnetic investigation was performed on the 35-m long MD03-2595 CADO (Coring Adélie Diatom Oozes) piston core recovered on the continental rise of the Wilkes Land Basin (East Antarctica). Analysis of the characteristic remanent magnetization (ChRM) inclination record indicates a normal magnetic polarity for the uppermost 34m of the sequence and a distinctive abrupt polarity change at the bottom of the core. This polarity change, which spans a 27 cm thick stratigraphic interval, represents a detailed record of the Matuyama–Brunhes (M–B) transition and it is preceded by a sharp oscillation in paleomagnetic directions that may correlate to the M–B precursor event. Paleomagnetic measurements enable reconstruction of geomagnetic relative paleointensity (RPI) variations, and a high-resolution age model was established by correlating the CADO RPI curve to the available global reference RPI stack, indicating that the studied sequence reaches back to ca. 800 ka with an average sedimentation rate of 4.4 cm/ka. Orbital periodicities (100 ka and 41 ka) were found in the ChRM inclination record, and a significant coherence of ChRM inclination and RPI record around 100 ka suggests that long-term geomagnetic secular variation in inclination is controlled by changes in the relative strength of the geocentric axial dipole and persistent non-dipole components. Moreover, even if the relatively homogeneous rock magnetic parameters and lithofacies throughout the recovered sequence indicates a substantial stability of the East Antarctic Ice Sheet during the middle and late Pleistocene, influence of the 100 ka and 41 ka orbital periodicities has been detected in some rock magnetic parameters, indicating subtle variations in the concentration and grain-size of the magnetic minerals linked to orbital forcing of the global climate. In press 2.2. Laboratorio di paleomagnetismo JCR Journal reserved Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Wilkes Land Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Antarctic East Antarctica East Antarctic Ice Sheet Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Physics of the Earth and Planetary Interiors 179 1-2 72 86 |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
topic |
Paleomagnetism Relative paleointensity Brunhes Chron Matuyama–Brunhes precursor Antarctica 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism 04. Solid Earth::04.05. Geomagnetism::04.05.07. Rock magnetism |
spellingShingle |
Paleomagnetism Relative paleointensity Brunhes Chron Matuyama–Brunhes precursor Antarctica 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism 04. Solid Earth::04.05. Geomagnetism::04.05.07. Rock magnetism Macrì, P. Sagnotti, L. Dinarès-Turell, J. Caburlotto, A. Relative geomagnetic paleointensity of the Brunhes Chron and the Matuyama–Brunhes precursor as recorded in sediment core from Wilkes Land Basin (Antarctica) |
topic_facet |
Paleomagnetism Relative paleointensity Brunhes Chron Matuyama–Brunhes precursor Antarctica 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism 04. Solid Earth::04.05. Geomagnetism::04.05.07. Rock magnetism |
description |
Paleomagnetic and rock magnetic investigation was performed on the 35-m long MD03-2595 CADO (Coring Adélie Diatom Oozes) piston core recovered on the continental rise of the Wilkes Land Basin (East Antarctica). Analysis of the characteristic remanent magnetization (ChRM) inclination record indicates a normal magnetic polarity for the uppermost 34m of the sequence and a distinctive abrupt polarity change at the bottom of the core. This polarity change, which spans a 27 cm thick stratigraphic interval, represents a detailed record of the Matuyama–Brunhes (M–B) transition and it is preceded by a sharp oscillation in paleomagnetic directions that may correlate to the M–B precursor event. Paleomagnetic measurements enable reconstruction of geomagnetic relative paleointensity (RPI) variations, and a high-resolution age model was established by correlating the CADO RPI curve to the available global reference RPI stack, indicating that the studied sequence reaches back to ca. 800 ka with an average sedimentation rate of 4.4 cm/ka. Orbital periodicities (100 ka and 41 ka) were found in the ChRM inclination record, and a significant coherence of ChRM inclination and RPI record around 100 ka suggests that long-term geomagnetic secular variation in inclination is controlled by changes in the relative strength of the geocentric axial dipole and persistent non-dipole components. Moreover, even if the relatively homogeneous rock magnetic parameters and lithofacies throughout the recovered sequence indicates a substantial stability of the East Antarctic Ice Sheet during the middle and late Pleistocene, influence of the 100 ka and 41 ka orbital periodicities has been detected in some rock magnetic parameters, indicating subtle variations in the concentration and grain-size of the magnetic minerals linked to orbital forcing of the global climate. In press 2.2. Laboratorio di paleomagnetismo JCR Journal reserved |
author2 |
Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Dinarès-Turell, J.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Caburlotto, A.; Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, 34010 Sgonico, Trieste, Italy Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, 34010 Sgonico, Trieste, Italy |
format |
Article in Journal/Newspaper |
author |
Macrì, P. Sagnotti, L. Dinarès-Turell, J. Caburlotto, A. |
author_facet |
Macrì, P. Sagnotti, L. Dinarès-Turell, J. Caburlotto, A. |
author_sort |
Macrì, P. |
title |
Relative geomagnetic paleointensity of the Brunhes Chron and the Matuyama–Brunhes precursor as recorded in sediment core from Wilkes Land Basin (Antarctica) |
title_short |
Relative geomagnetic paleointensity of the Brunhes Chron and the Matuyama–Brunhes precursor as recorded in sediment core from Wilkes Land Basin (Antarctica) |
title_full |
Relative geomagnetic paleointensity of the Brunhes Chron and the Matuyama–Brunhes precursor as recorded in sediment core from Wilkes Land Basin (Antarctica) |
title_fullStr |
Relative geomagnetic paleointensity of the Brunhes Chron and the Matuyama–Brunhes precursor as recorded in sediment core from Wilkes Land Basin (Antarctica) |
title_full_unstemmed |
Relative geomagnetic paleointensity of the Brunhes Chron and the Matuyama–Brunhes precursor as recorded in sediment core from Wilkes Land Basin (Antarctica) |
title_sort |
relative geomagnetic paleointensity of the brunhes chron and the matuyama–brunhes precursor as recorded in sediment core from wilkes land basin (antarctica) |
publisher |
Elsevier B.V. |
publishDate |
2009 |
url |
http://hdl.handle.net/2122/5555 https://doi.org/10.1016/j.pepi.2009.12.002 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Antarctic East Antarctica East Antarctic Ice Sheet Wilkes Land |
geographic_facet |
Antarctic East Antarctica East Antarctic Ice Sheet Wilkes Land |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Wilkes Land |
op_relation |
Physics of the Earth and Planetary Interiors http://hdl.handle.net/2122/5555 doi:10.1016/j.pepi.2009.12.002 |
op_rights |
restricted |
op_doi |
https://doi.org/10.1016/j.pepi.2009.12.002 |
container_title |
Physics of the Earth and Planetary Interiors |
container_volume |
179 |
container_issue |
1-2 |
container_start_page |
72 |
op_container_end_page |
86 |
_version_ |
1766271543123378176 |