On the reliability of paleomagnetic observations on volcanic rocks as a record of the past geomagnetic field
Por:
Urrutia-Fucugauchi J.
Publicada:
1 ene 1994
Resumen:
Results of a detailed study of a 200 years old volcanic field in the Southern Basin of Mexico are reported. The study was undertaken in order to assess the reliability of the paleomagnetic record as derived from fresh well preserved and exposed flows of the Xitle Pedregal de San Angel field. Effects of magnetic versus solar compass orientation, anisotropy of magnetic susceptibility (AMS), vertical variation of magnetic mineralogy and properties, between flow unit changes and secular variation are investigated. The overall mean direction is close to the dipolar direction and the mean paleointensity is about 57.13 ± 7.23 mT, which is higher than the present day value. -from Author
Filiaciones:
Urrutia-Fucugauchi J.:
Laboratorio de Paleomagnetismo, Univ Nacional Autonoma de Mexico, del Coyoacan, DF, Mexico, Mexico