Seven thousand year duration for a geomagnetic excursion constrained by 230Thxs

Geophysical Research Letters

Volumn 34, Issue 22, 2007, Pages

  Knudsen, Mads Faurschou ^a   Henderson, Gideon M ^a   Niocaill, Conall Mac ^a   West, A Joshua ^a  

^a UNIVERSITY OF OXFORD   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

GEOMAGNETISM; OCEAN STRUCTURES; SEDIMENTS; THORIUM;

GEODYNAMO; GEOMAGNETIC EXCURSION; MARINE SEDIMENTS; PALEOMAGNETIC RECORDS;

GEOCHRONOLOGY;

GEODYNAMO; GEOMAGNETIC FIELD; GEOMAGNETISM; MAGNETIC REVERSAL; MARINE SEDIMENT; PALEOMAGNETISM; SEAFLOOR;

ATLANTIC OCEAN; ICELAND BASIN;

EID: 38049034380     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/2007GL031090     Document Type: Article

References (24)

1. Bacon, M. P., and R. F. Anderson (1982), Distribution of thorium isotopes between dissolved and particulate forms in the deep ocean, J. Geophys. Res., 87, 2045-2056.
2. Bickert, T., W. B. Curry, and G. Wefer (1997), Late Pliocene to Holocene (2.6-0 Ma) Western Equatorial Atlantic deep-water circulation: Inferences from benthic stable isotopes, Proc. Ocean Drill Program Sci. Results, 154, 239-254.
3. Channell, J. E. T. (2006), Late Brunhes polarity excursions (Mono Lake, Laschamp, Iceland Basin and Pringle Falls) recorded at ODP Site 919 (Irminger Basin), Earth Planet. Sci. Lett., 244, 378-393.
4. Channell, J. E. T., and H. F. Kleiven (2000), Geomagnetic palaeointensities and astrochronological ages for the Matuyama-Brunhes boundary and the boundaries of the Jaramillo Subchron: Paleomagnetic and oxygen isotope records from ODP Site 983, Philos. Trans. R. Soc. London, Ser. A, 358, 1027-1047.
5. 18O at ODP Site 983 (Gardar Drift, North Atlantic) since 350 ka, Earth Planet. Sci. Lett., 153, 103-118.
6. Clement, B. M. (2004), Dependence of the duration of geomagnetic polarity reversals on site latitude, Nature, 428, 637-640.
7. 230Th normalization: An essential tool for interpreting sedimentary fluxes during the late Quaternary, Paleoceanography, 19, PA1018, doi:10.1029/2003PA000939.
8. 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.
9. Gubbins, D. (1999), The distinction between geomagnetic excursions and reversals, Geophys. J.. Int., 137, F1-F3.
10. Henderson, G. M. and R. F. Anderson (2003), The U-series toolbox for paleocaenography, in Uranium-Series Geochemistry, Rev. Mineral. Geochem., vol. 52, pp. 493-531, Min. Soc. of Am., Washington, D. C.
11. Hollerbach, R., and C. A. Jones (1993), Influence of the Earth's inner core on geomagnetic fluctuations and reversals, Nature, 365, 541-543.
12. Knudsen, M. F., C. Mac Niocaill, 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.
13. 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.
14. 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.
15. Leonhardt, R., and K. Fabian (2007), Paleomagnetic reconstruction of the global geomagnetic field evolution during the Matuyama/Brunhes transition: Iterative Bayesian inversion and independent verification, Earth Planet. Sci. Lett., 253, 172-195.
16. Martinson, D. G., N. G. Pisias, J. D. Hays, J. Imbrie, T. C. Moore Jr., and N. J. Shackleton (1987), Age dating and the orbital theory of the ice ages: Development of a high-resolution 0 to 300,000-year chronostratigraphy, Quat. Res., 27, 1-29.
17. 14C, Quat. Sci. Rev., 24, 1849-1860.
18. 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.
19. 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.
20. Roberts, A. P., and M. Winklhofer (2004), Why are geomagnetic excursions not always recorded in sediments? Constraints from post-depositional remanent magnetisation lock-in modelling, Earth Planet. Sci. Lett., 227, 345-359.
21. 39vAr incremental heating analyses of lavas, Earth Planet. Sci. Lett., 139, 47-61.
22. Singer, B., K. A. Hoffman, R. S. Coe, L. L. Brown, B. R. Jicha, M. S. Pringle, and A. Chauvin (2005), Structural and temporal requirements for geomagnetic field reversal deduced from lava flows, Nature, 434, 633-636.
23. Verosub, K. L. (1977), Geomagnetic excursions and their paleomagnetic record, Rev. Geophys., 15, 145-155.
24. 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.