Physics
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pepi...77..297v&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 77, Issue 3-4, p. 297-313.
Physics
4
Scientific paper
The detailed paleomagnetic records of the upper and lower Nunivak polarity transitions have been determined from Pliocene marine marls in southern Sicily. Magnetites are the most important carrier of the remanence in both records. The transitions are recorded in two components; a low temperature and a high temperature component. The two components do not represent the geomagnetic field because the changes in these components take place at lithological boundaries. In addition, the directional changes do not completely match directional changes of the same transitions recorded in Calabria, some 250 km away. The character of the virtual geomagnetic poles paths is probably caused by smoothing of the stable directions before and after the transitions. The directional changes as well as the smoothing mechanism can be explained by the diagenetic magnetite formation model (Van Hoof et al., 1992) in which shortly after burial, the remanence carried by newly formed secondary magnetites is superposed on the initial remanence carried by primary magnetite.
Langereis Cor G.
van Hoof A. M. A.
van Os Bertil J. H.
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