HR: 0800h
AN: GP11D-0878    [Abstracts]
TI: Paleomagnetic Evidence on a Volcanological Mystery - The 1631 Eruption of Mount Vesuvius, Italy
AU: * Conte, G
EM: gennaro@geofisica.unam.mx
AF: Instituto de Geofisica, UNAM, Ciudad Universitaria s/n, Mexico, 04510 Mexico
AU: Urrutia-Fucugauchi, J
EM: juf@geofisica.unam.mx
AF: Instituto de Geofisica, UNAM, Ciudad Universitaria s/n, Mexico, 04510 Mexico
AU: Gogichaishvili, A
EM: avto@geofisica.unam.mx
AF: Instituto de Geofisica, UNAM, Ciudad Universitaria s/n, Mexico, 04510 Mexico
AU: Incoronato, A
EM: gennaro@geofisica.unam.mx
AF: Dipartimento di Scienze della Terra, Universite di Napoli, Largo S. Marcellino nø 10, 80138, Napoli, 80138 Italy
AB: Was or was not effusive activity part of the 1631 eruption of Mount Vesuvius? We report on a detailed rock magnetic, paleomagnetic and absolute paleointensity study of lava flows from Mount Vesuvius and on its evidence concerning the enigmatic 1631 eruptive episode. Characteristic magnetization directions determined from detailed stepwise alternating field and thermal demagnetization give four new well-defined flow unit mean directions with a95 ranging from 0.7ø to 2.4ø. Paleodirections for eight lava flows from twenty-two flows studied appear related to the 1631 eruption, as indicated by their correlation to the early seventeen century segment of the Italian paleosecular variation reference curve. This provides new evidence supporting that the 1631 episode was an explosive-effusive eruption.
DE: 1500 GEOMAGNETISM AND PALEOMAGNETISM
DE: 1522 Paleomagnetic secular variation
DE: 1527 Paleomagnetism applied to geologic processes
DE: 1540 Rock and mineral magnetism
DE: 1560 Time variations--secular and long term
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2004 AGU Fall Meeting