Palaeointensity results from Ethiopian basalts: Implications for the Oligocene geomagnetic field strength

Geophysical Journal International

Volumn 138, Issue 2, 1999, Pages 590-596

  Riisager, Janna ^a   Perrin, Mireille ^a   Rochette, Pierre ^b  

^a UNIV MONTPELLIER   (France)

^b AIX MARSEILLE UNIVERSITY   (France)

Author keywords

Ethiopia; Oligocene; Palaeointensity; Thellier method

Indexed keywords

BASALT; GEOMAGNETIC FIELD; MAGNETIC INTENSITY; OLIGOCENE; PALEOMAGNETISM;

ETHIOPIA;

EID: 0032738413     PISSN: 0956540X     EISSN: None     Source Type: Journal    
DOI: 10.1046/j.1365-246X.1999.00875.x     Document Type: Article

References (28)

1. Borisova, G.P., 1986. Estimation of the paleointensity of the geomagnetic field by a complex of thermal methods, Izv. Acad. Sci. USSR Earth Phys. (Engl. trans.), 22, 840-845.
2. Camps, P. & Prévot, M., 1996. A statistical model of the fluctuations in the geomagnetic field from paleosecular variation to reversal, Science, 273, 776-779.
3. Coe, R.S., Grommé, C.S. & Mankinen, E.A., 1978. Geomagnetic paleointensities from radiocarbon-dated lava flows on Hawaii and the question of the Pacific nondipole low, J. geophys. Res., 83, 1740-1756.
4. Courtillot, V. & Besse, J., 1987. Magnetic field reversals, polar wander, and core-mantle coupling, Science, 237, 1140-1147.
5. Gallet, Y. & Courtillot, V., 1995. Geomagnetic reversal behaviour since 100 Ma, Phys. Earth planet. Inter., 92, 235-244.
6. Hofmann, C., Courtillot, V., Féraud, G., Rochette, P., Yirgu, G., Ketefo, E. & Pik, R., 1997. Timing of the Ethiopian flood basalts event and implications for plume birth and global change, Nature, 389, 838-841.
7. Hulot, G. & Le Mouël, J.L., 1994. A statistical approach to the Earth's main magnetic field, Phys. Earth planet. Inter., 82, 167-183.
8. Juárez, M.T., Tauxe, L., Gee, J.S. & Pick, T., 1998. The intensity of the Earth's magnetic field over the past 160 million years, Nature, 394, 878-881.
9. Koenigsberger, J.G., 1938. Natural residual magnetism of eruptive rocks, Terr. Magn. Atmos. Elect., 43, 299-320.
10. Kono, M. & Ueno, N., 1977. Paleointensity determination by a modified Thellier method, Phys. Earth planet. Inter., 13, 305-314.
11. Livermore, R.A., Vine, F.J. & Smith, A.G., 1984. Plate motions and the geomagnetic field II. Jurassic to Tertiary, Geophys. J. R. astr. Soc., 79, 939-961.
12. McFadden, P.L. & Merrill, R.T., 1995a. History of Earth's magnetic field and possible connections to core-mantle boundary processes, J. geophys. Res., 100, 307-316.
13. McFadden, P.L. & Merrill, R.T., 1995b. Fundamental transitions in the geodynamo as suggested by paleomagnetic data, Phys. Earth planet. Inter., 91, 253-260.
14. Mohr, P. & Zanettin, B., 1988. The Ethiopian flood basalt province, in Continental Flood Basalts, pp. 63-110, ed. McDougall, J.D., Kluwer Academic, Dordrecht.
15. Nagata, T., Arai, Y. & Momose, K., 1963. Secular variation of the geomagnetic total force during the last 5000 years, J. geophys. Res., 68, 5277-5282.
16. Perrin, M., 1998. Paleointensity determination, magnetic domain structure and selection criteria, J. geophys. Res., 103, 30 591-30 600.
17. Perrin, M. & Shcherbakov, V., 1997. Paleointensity of the Earth's magnetic field for the past 4000 My. Evidence for a dipole structure during the Mesozoic Low, J. Geomag. Geoelectr., 49, 601-614.
18. Perrin, M., Schnepp, E. & Shcherbakov, V., 1998. Paleointensity database updated, EOS Note, 79, 198.
19. Pik, R., Deniel, C., Coulon, C., Yirgu, G., Hofmann, C. & Ayalew, D., 1998. The northwestern Ethiopian plateau flood basalts. Classification and spatial distribution of magma types, J. Volc. Geotherm. Res., 81, 91-111.
20. Prévot, M., Derder, M.E.M., McWilliams, M. & Tompson, M.J., 1990. Intensity of the Earth's magnetic field: evidence for a Mesozoic dipole low, Earth planet. Sci. Lett., 97, 129-139.
21. Rochette, P. et al., 1998. Magnetostratigraphy and timing of the Oligocene Ethiopian traps, Earth planet. Sci. Lett., 164, 497-510.
22. Schneider, D.A. & Kent, D.V., 1990. The time-averaged paleomagnetic field, Rev. Geophys., 28, 71-96.
23. Smith, P.J., 1967. The intensity of the Tertiary geomagnetic field, Geophys. J. R. astr. Soc., 12, 239-258.
24. Solodovnikov, G.M., 1997. Paleointensity of the Earth's magnetic field in Oligocene and Miocene, in Abstracts Paleomagnetism and Rock Magnetism Conference, pp. 74-76, Moscow.
25. Thellier, E. & Thellier, O., 1959. Sur l'intensité du champ magnétique terrestre dans le passé historique et géologique, Ann. Géophys., 15, 285-376.
26. Torcq, F., 1997. Evolution et destruction de la Pangéa du Carbonifère au Jurassique dérivé des pôles magnétiques et étude de la dipolarité du champ, PhD thesis, Univ. Paris 7.
27. Urrutia Fucugauchi, J., 1980. Paleointensity determination and K-Ar dating of the Tertiary north-east Jalisco volcanics (Mexico), Geophys. J. R. astr. Soc., 63, 601-618.
28. Wilson, R.L., 1961. Palaeomagnetism in Northern Ireland, Part I. The thermal demagnetization of natural magnetic moments in rocks, Geophys. J. R. astr. Soc., 5, 45-58.