Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/1325
Título: Paleomagnetic study of the Great Foum Zguid dyke (southern Morocco): A positive contact test related to metasomatic processes
Autor: Silva, P. F.
Henry, B.
Marques, F. O.
Madureira, P.
Miranda, J. M.
Palavras-chave: Magnetic-Properties
Atlantic
Data: 1-Nov-2006
Editora: Amer Geophysical Union
Citação: Silva P F, Henry B, Marques F O, Madureira P, Miranda J M.Paleomagnetic study of the Great Foum Zguid dyke (southern Morocco): A positive contact test related to metasomatic processes.Geophysical Research Letters. 2006; Volume: 33, Issue: 21, Article Number: L21301.
Relatório da Série N.º: 33;L21301
Resumo: When a paleomagnetic pole is sought for in an igneous body, the host rocks should be subjected to a contact test to assure that the determined paleopole has the age of the intrusion. If the contact test is positive, it precludes the possibility that the measured magnetization is a later effect. Therefore, we investigated the variations of the remanent magnetization along cross-sections of rocks hosting the Foum Zguid dyke (southern Morocco) and the dyke itself. A positive contact test was obtained, but it is mainly related with Chemical/Crystalline Remanent Magnetization due to metasomatic processes in the host-rocks during magma intrusion and cooling, and not only with Thermo-Remanent Magnetization as ordinarily assumed in standard studies. Paleomagnetic data obtained within the dyke then reflect the Earth magnetic field during emplacement of this well-dated (196.9 +/- 1.8 Ma) intrusion.
Peer review: yes
URI: http://hdl.handle.net/10400.21/1325
ISSN: 0094-8276
Aparece nas colecções:ISEL - Eng. Civil - Artigos



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