Geomagnetic excursions: Knowns and unknowns

Geophysical Research Letters

Volumn 35, Issue 17, 2008, Pages

  Roberts, Andrew P ^a  

^a UNIVERSITY OF SOUTHAMPTON   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

ATMOSPHERICS; EARTH SCIENCES; GEOCHRONOLOGY; MAGNETIC FIELDS; SEDIMENTATION;

AGE CONTROLS; EARTH'S MAGNETIC FIELDS; GEOMAGNETIC EXCURSIONS; GLOBAL DISTRIBUTIONS; HIGH RESOLUTIONS; HYPOTHESIS TESTING; RESEARCH AREAS; SEDIMENTATION RATES; SOLID EARTHS; SOUTHERN HEMISPHERES;

GEOMAGNETISM;

GEOCHRONOLOGY; GEODYNAMICS; GEOMAGNETIC FIELD; HYPOTHESIS TESTING; SEDIMENTATION RATE; SOUTHERN HEMISPHERE;

EID: 57049119071     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/2008GL034719     Document Type: Article

References (38)

1. Busse, F. H., and R. D. Simitev (2008), Toroidal flux oscillations as possible causes of geomagnetic excursions and reversals, Phys. Earth Planet. Inter., 168, 237-243, doi:10.1016/j.pepi.2008.06.007.
2. Cassata, W. S., B. S. Singer, and J. Cassidy (2008), Laschamp and Mono Lake geomagnetic excursions recorded in New Zealand, Earth Planet. Sci. Lett., 268, 76-88.
3. Channell, J. E. T. (1999), Geomagnetic paleointensity and directional secular variation at Ocean Drilling Program (ODP) Site 984 (Bjorn Drift) since 500 ka: Comparisons with ODP Site 983 (Gardar Drift), J. Geophys. Res., 104, 22,937-22,951.
4. Channell, J. E. T. (2006), Late Brunhes polarity excursious (Mono Lake, Laschamp, Iceland Basin and Pringle Falls) recorded at ODP Site 919 (Irminger Basin), Earth Planet. Sci. Lett., 244, 378-393.
5. Channell, J. E. T., and B. Lehman (1997), The last two geomagnetic polarity reversals recorded in high-deposition-rate sediment drifts, Nature, 389, 712-715.
6. Clement, B. M. (2004), Dependence of the duration of geomagnetic polarity reversals on site latitude, Nature, 428, 637-640.
7. Grützner, J., et al. (2002), Astronomical age models for Pleistocene drift sediments from the western North Atlantic (ODP sites 1055-1063), Mar. Geol., 189, 5-23.
8. Gubbins, D. (1999), The distinction between geomagnetic excursions and reversals, Geophys. J. Int., 137, F1-F3.
9. Guillou, H., B. S. Singer, C. Laj, C. Kissel, S. Scaillet, and B. R. Jicha (2004), On the age of the Laschamp geomagnetic excursion, Earth Planet. Sci. Lett., 227, 331-343.
10. Guyodo, Y., and J.-P. Valet (1999), Global changes in intensity of the Earth's magnetic field during the past 800 kyr, Nature, 399, 249-252.
11. 39Ar dating and tephrochronology: The Jamaica, Blake or a new polarity episode?, J. Geophys, Res., 99, 24,091-24,103.
12. Horng, C. S., A. P. Roberts, and W. T. Liang (2003), A 2.14-Myr astronomically tuned record of relative geomagnetic paleointensity from the western Philippine Sea, J. Geophys. Res., 108(B1), 2059, doi:10.1029/2001JB001698.
13. Kent, D. V., and D. A. Schneider (1995), Correlation of paleointensity variation records in the Brunhes/Matuyama polarity transition interval, Earth Planet. Sci. Lett., 129, 135-144.
14. Knudsen, M. F., C. MacNiocaill, and G. M. Henderson (2006), High-resolution data of the Iceland Basin geomagnetic excursion from ODP sites 1063 and 983: Existence of intense flux patches during the excursion?, Earth Planet. Sci. Lett., 251, 18-32.
15. xs, Geophys. Res. Lett., 34, L22302, doi:10.1029/2007GL031090.
16. Laj, C., and J. E. T. Channell (2007), Geomagnetic excursions, in Treatise on Geophysics, vol. 5, Geomagnetism, edited by M. Kono, pp. 373-416, Elsevier, Amsterdam.
17. Laj, C., C. Kissel, A. Mazaud, J. E. T. Channell, and J. Beer (2000), North Atlantic palaeointensity stack since 75 ka (NAPIS-75) and the duration of the Laschamp event, Philos. Trans. R. Soc. London, Ser. A, 358, 1009-1025.
18. Laj, C., C. Kissel, and A. P. Roberts (2006), Geomagnetic field behavior during the Iceland Basin and Laschamp geomagnetic excursions: A simple transitional field geometry?, Geochem. Geophys. Geosyst., 7, Q03004, doi:10.1029/2005GC001122.
19. Lund, S. P., T. Williams, G. D. Acton, B. Clement, and M. Okada (2001), Brunhes Chron magnetic field excursions recovered from Leg 172 sediments, Proc. Ocean Drill. Program Sci. Res. [CD-ROM], edited by L. D. Keigwin et al., 172, 1-18.
20. Lund, S. P., M. Schwartz, L. Keigwin, and T. Johnson (2005), Deep-sea sediment records of the Laschamp geomagnetic field excursion (∼41,000 calendar years before present), J. Geophys. Res., 110, B04101, doi:10.1029/2003JB002943.
21. Mankinen, E. A., M. Prévot, C. S. Grommé, and R. S. Coe (1985), The Steens Mountain (Oregon) geomagnetic polarity transition: 1. Directional history, duration of episodes and rock magnetism, J. Geophys. Res., 90, 10,393-10,416.
22. Merrill, R. T., and P. L. McFadden (1994), Geomagnetic field stability: Reversal events and excursions, Earth Planet. Sci. Lett., 121, 57-69.
23. Merrill, R. T., and P. L. McFadden (2005), The use of magnetic field excursions in stratigraphy, Quat. Res., 63, 232-237.
24. Mochizuki, N., H. Tsunakawa, H. Shibuya, J. Cassidy, and I. E. M. Smith (2006), Palaeointensities of the Auckland geomagnetic excursions by the LTD-DHT Shaw method, Phys. Earth Planet. Inter., 154, 168-179.
25. Nowaczyk, N. R., and M. Antonow (1997), High-resolution magnetostratigraphy of four sediment cores from the Greenland Sea - I. Identification of the Mono Lake excursion, Laschamp, and Biwa I/Jamaica geomagnetic polarity events, Geophys. J. Int., 131, 310-324.
26. Oda, H., K. Nakamura, K. Ikehara, T. Nakano, M. Nishimura, and O. Khlystov (2002), Paleomagnetic record from Academician Ridge, Lake Baikal: A reversal excursion at the base of marine oxygen isotope stage 6, Earth Planet. Sci. Lett., 202, 117-132.
27. Plenier, G., J.-P. Valet, G. Guérin, J.-C. Lefèvre, M. LeGoff, and B. Carter-Stiglitz (2007), Origin and age of the directions recorded during the Laschamp event in the Chaîne des Puys (France), Earth Planet. Sci. Lett., 259, 414-431.
28. Roberts, A. P., and M. Winklhofer (2004), Why are geomagnetic excursions not always recorded in sediments? Constraints from post-depositional remanent magnetization lock-in modelling, Earth Planet. Sci. Lett., 227, 345-359.
29. Roberts, A. P., B. Lehman, R. J. Weeks, K. L. Verosub, and C. Laj (1997), Relative paleointensity of the geomagnetic field over the last 200,000 years from ODP sites 883 and 884, North Pacific Ocean, Earth Planet. Sci. Lett., 152, 11-23.
30. Roberts, A. P., A. Bakrania, F. Florindo, C. J. Rowan, C. R. Fielding, and R. D. Powell (2007), High-resolution evidence for dynamic transitional geomagnetic field behaviour from a Miocene reversal, McMurdo Sound, Ross Sea, Antarctica, Earth Planets Space, 59, 815-824.
31. 39Ar timescale of reversals and events, J. Geophys. Res. 104, 679-693.
32. 39Ar dating links Albuquerque volcanoes to the Pringle Falls excursion and the geomagnetic instability time scale, Earth Planet. Sci. Lett., 267, 584-595.
33. Singer, B. S., K. A. Hoffman, E. Schnepp, and H. Guillou (2008b), Multiple Brunhes Chron excursions recorded in the West Eifel (Germany) volcanics: Support for long-held mantle control over the non-axial dipole field, Phys. Earth Planet. Inter., doi:10.1016/ j.pepi.2008.05.001, in press.
34. Thompson, R., and B. Berglund (1976), Late Weichselian geomagnetic 'reversal' as a possible example of the reinforcement syndrome, Nature, 259, 490-491.
35. Thouveny, N., and K. M. Creer (1992), On the brevity of the Laschamp excursion, Bull. Soc. Geol. Fr., 163, 771-780.
36. Vandamme, D. (1994), A new method to determine paleosecular variation, Phys. Earth Planet. Inter., 85, 131-142.
37. Wagner, G., J. Beer, C. Laj, C. Kissel, J. Masarik, R. Muscheler, and H.-A. Synal (2000), Chlorine-36 evidence for the Mono Lake event in the summit GRIP ice core, Earth Planet. Sci. Lett., 181, 1-6.
38. Wicht, J. (2002), Inner-core conductivity in numerical dynamo simulations, Phys. Earth Planet. Inter., 132, 281-302.