| Type |
Article |
| Date |
2003-08 |
| Language |
English |
| Author(s) |
Carcaillet Jt1, Thouveny N1, Bourles Dl1 |
| Affiliation(s) |
1 : CEREGE, Europole Mediterraneen Arbois, F-13545 Aix En Provence 04, France. |
| Source |
Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2003-08 , Vol. 30 , N. 15 , P. 5.1-5.4 |
| DOI |
10.1029/2003GL017550 |
| WOS© Times Cited |
43 |
| Keyword(s) |
geomagnetic excursions and reversals, paleointensity, geomagnetic moment, authigenic (10)Be/(9)Be, cosmogenic isotope production, marine sedimentary archives |
| Abstract |
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 (10)Be/(9)Be 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. |
| Full Text |
| File |
Pages |
Size |
Access |
| Publisher's official version |
4 |
351 KB |
Open access |
|
