Further details on the applicability of Thellier paleointensity method: The effect of magnitude of laboratory field |
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| Authors: | Juan Morales Avto Goguitchaichvili Luis M Alva-Valdivia Jaime Urrutia-Fucugauchi |
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| Institution: | Laboratorio de Paleomagnetismo y Geofisica Nuclear, Instituto de Geofisica, UNAM, Ciudad Universitaria S/N, 04510 México DF, Mexico |
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| Abstract: | Twenty years after Tanaka and Kono's pioneering contribution (Tanaka and Kono, 1984), we give some new details on the effect of applied field strength during Thellier paleointensity experiments. Special attention is paid to the relation of magnitude of laboratory field and Coe's quality factors (Coe et al., 1978). Full thermoremanent magnetizations were imparted on natural samples containing low-Ti titanomagnetites of pseudo-single domain structure in a 40-μT magnetic field from 600?°C to room temperature. The samples were subjected to the routine Thellier procedure using a wide range of applied laboratory fields. Results indicate that values of laboratory fields may be accurately reproduced within 2% of standard error. The quality factors, however, decrease when the magnitude of ‘ancient’ field does not match to applied laboratory fields. To cite this article: J. Morales et al., C. R. Geoscience 338 (2006). |
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| Keywords: | Paleointensity Thellier method Rock magnetism Paléo-intensité Méthode de Thellier Magnétisme des roches |
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