HR: 10:20h
AN: V22A-01    [Abstracts]
TI: History of the magmatic feeding system of the Campi Flegrei caldera (Italy)
AU: * Civetta, L
EM: civetta@ov.ingv.it
AF: Università Federico II di Napoli, Complesso Monte Sant'Angelo via Cinthia, naples, 80126, Italy
AU: * Civetta, L
EM: civetta@ov.ingv.it
AF: Istituto Nazaionale di Geofisica e Vulcanologia-Sezione Osservatorio Vesuviano, Via Diocleziano 328, Naples, 80124, Italy
AU: Arienzo, I
AF: Istituto Nazaionale di Geofisica e Vulcanologia-Sezione Osservatorio Vesuviano, Via Diocleziano 328, Naples, 80124, Italy
AU: D'Antonio, M
AF: Università Federico II di Napoli, Complesso Monte Sant'Angelo via Cinthia, naples, 80126, Italy
AU: Di Renzo, V
AF: Istituto Nazaionale di Geofisica e Vulcanologia-Sezione Osservatorio Vesuviano, Via Diocleziano 328, Naples, 80124, Italy
AU: Di Vito, M A
AF: Istituto Nazaionale di Geofisica e Vulcanologia-Sezione Osservatorio Vesuviano, Via Diocleziano 328, Naples, 80124, Italy
AU: Orsi, G
AF: Istituto Nazaionale di Geofisica e Vulcanologia-Sezione Osservatorio Vesuviano, Via Diocleziano 328, Naples, 80124, Italy
AB: The definition of the magmatic feeding system of active volcanoes in terms of architecture, composition, crystallization time-scale, relationships between composition of the erupted magmas and structural position of the vents, and magma processes, is of paramount importance for volcanic hazards evaluation. Investigations aimed at defining the Campi Flegeri magmatic system, include detailed mineralogical, geochemical and isotopic analyses (Sr, Nd, Pb, Th,U). The magmatic feeding system of the Campi Flegrei caldera is characterized by deep and shallow magma reservoirs. In the deep reservoirs (20-10 km depth) mantle- derived magmas differentiated and were contaminated by continental crust. In the shallow reservoirs isotopically distinct magmas, further differentiated, contaminated, and mixed and mingled before eruptions. These processes generated isotopically distinct components, variably interacting with the different structural elements of the Campi Flegrei caldera through time. The relationships between the structural position of the eruption vents, during the last 15 ka of activity, and the isotopic composition of the magmas erupted at the Campi Flegrei caldera allow us to reconstruct the architecture of the magmatic feeding system and to infer the chemical and isotopic composition of the magma feeding a future eruption, according to vent position.
DE: 3618 Magma chamber processes (1036)
DE: 3621 Mantle processes (1038)
DE: 3643 Layered magma chambers
DE: 8440 Calderas
DE: 8488 Volcanic hazards and risks
SC: Volcanology, Geochemistry, and Petrology [V]
MN: 2007 Joint Assembly