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| Detailed Reference Information |
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Carlut, J., Valet, J.P., Quidelleur, X., Courtillot, V., Kidane, T., Gallet, Y. and Gillot, P.Y. (1999). Paleointensity across the reunion event in Ethiopia. Earth and Planetary Science Letters 170(1-2): 17-34. doi: 10.1016/S0012-821X(99)00094-1. |
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Paleointensity experiments have been conducted on a volcanic series of 33 flows which recorded the geomagnetic Reunion event. Successive determinations of absolute paleointensity from 20 Bows indicate that the Reunion event would actually be characterized by two successive periods of low field intensity, with a total duration not in excess of 30 kyr. The first period has a mean paleointensity of 12 mu T and shows significant deviations from initial reverse polarity but no signs of fully normal polarity. It is followed by field recovery, then a decrease prior to the second directional episode. The second period has a mean paleointensity of 17 mu T and is associated with full normal directions, and thus likely a dominantly dipolar configuration. These results are compatible with a simple 'earthlike' magnetic field model with a large decrease in dipole field strength which yields local emergence of relatively stronger non-dipole components. Field characteristics from this configuration would be different at different locations and could explain the variability of the paleomagnetic records collected around the world. We propose that the absence of field recovery following the event is responsible for not leading to a durable polarity interval. (C) 1999 Elsevier Science B.V. All rights reserved. |
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Abstract |
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Table 1A |
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Table 1B |
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Absolute Paleointensity Method |
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Keywords
paleomagnetism, magnetic intensity, ethiopia, reversals, thermal demagnetization, polarity time-scale, earths magnetic-field, geomagnetic-field, lava flows, afar, propagation, intensity, reversals, sediments, accuracy |
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Publisher
Elsevier Science
P.O. Box 211
1000 AE Amsterdam
The Netherlands
(+31) 20 485 3757
(+31) 20 485 3432
nlinfo-f@elsevier.com |
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