Paleomagnetic and beryllium isotope record of West Equatorial Pacific sediments
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| Auteurs principaux: | , , |
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2003
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| _version_ | 1867170457989414912 |
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| author | Carcaillet, Julien Thouveny, Nicolas Bourlès, Didier L |
| author_facet | Carcaillet, Julien Thouveny, Nicolas Bourlès, Didier L |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The reliability of paleomagnetic records as proxies of the geomagnetic field intensity is still a matter of controversy since volcanic materials hardly provide continuous records, and marine sediments are suspected to carry a remanence biased by post-depositional realignments and/or by overprints. Such long standing debate emphasizes the need for the development of methods independent from paleomagnetism to decipher geomagnetic intensity variations. High resolution measurements of authigenic 10Be/9Be along with a detailed sedimentary record of directional and relative paleointensity variations evidence, over the 0.6-1.3 Ma time interval, frequent and recurrent excursions or short events in the late Matuyama and the early Brunhes epochs, among which two Brunhes-Matuyama reversal precursors and an intra-Jaramillo excursion. The results of this study confirm the idea of a highly unstable geomagnetic field as suggested by paleomagnetic evidences. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_740068 |
| institution | PANGAEA |
| language | en |
| publishDate | 2003 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Paleomagnetic and beryllium isotope record of West Equatorial Pacific sediments Carcaillet, Julien Thouveny, Nicolas Bourlès, Didier L CALYPSO; Calypso Corer; IMAGES; IMAGES I; IMAGES III - IPHIS; International Marine Global Change Study; Marion Dufresne (1995); MD101__Campaign; MD106; MD952040; MD95-2040; MD972140; MD97-2140; Porto Seamount The reliability of paleomagnetic records as proxies of the geomagnetic field intensity is still a matter of controversy since volcanic materials hardly provide continuous records, and marine sediments are suspected to carry a remanence biased by post-depositional realignments and/or by overprints. Such long standing debate emphasizes the need for the development of methods independent from paleomagnetism to decipher geomagnetic intensity variations. High resolution measurements of authigenic 10Be/9Be along with a detailed sedimentary record of directional and relative paleointensity variations evidence, over the 0.6-1.3 Ma time interval, frequent and recurrent excursions or short events in the late Matuyama and the early Brunhes epochs, among which two Brunhes-Matuyama reversal precursors and an intra-Jaramillo excursion. The results of this study confirm the idea of a highly unstable geomagnetic field as suggested by paleomagnetic evidences. |
| title | Paleomagnetic and beryllium isotope record of West Equatorial Pacific sediments |
| topic | CALYPSO; Calypso Corer; IMAGES; IMAGES I; IMAGES III - IPHIS; International Marine Global Change Study; Marion Dufresne (1995); MD101__Campaign; MD106; MD952040; MD95-2040; MD972140; MD97-2140; Porto Seamount |
| url | https://doi.org/10.1594/PANGAEA.740068 |