3-D Laboratory and Numerical Models of Mantle Flow in Subduction Zones

HR: 0800h
AN: T21B-0527 [Abstracts]
TI: 3-D Laboratory and Numerical Models of Mantle Flow in Subduction Zones
AU: * Funiciello, F
EM: ffunicie@uniroma3.it
AF: Dip.Scienze Geologiche Univ. "Roma TRE", L.go S.Leonardo Murialdo 1, Roma, 00146 Italy
AU: Piromallo, C
EM: piromallo@ingv.it
AF: Istututo Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, Roma, 00143 Italy
AU: Moroni, M
EM: monica.moroni@uniroma1.it
AF: Dipartimento di Idraulica, Trasporti e Strade, Univ. Roma "La Sapienza", Via Eudossiana, 20, Roma, 00184 Italy
AU: Becker, T
EM: twb@usc.edu
AF: Department of Earth Sciences, University of Southern California, 3651 Trousdale Pkwy, Los Angeles, CA 90089-0740 United States
AU: Faccenna, C
EM: faccenna@uniroma3.it
AF: Dip.Scienze Geologiche Univ. "Roma TRE", L.go S.Leonardo Murialdo 1, Roma, 00146 Italy
AU: Bui, H
EM: haianbui@caramail.com
AF: Universit‚ Pierre et Marie Curie (Paris 6), T 26-0, E1, case 129, 4 place Jussieu, Paris, 75252 France
AU: Cenedese, A
EM: ffunicie@uniroma3.it
AF: Dipartimento di Idraulica, Trasporti e Strade, Univ. Roma "La Sapienza", Via Eudossiana, 20, Roma, 00184 Italy
AB: Analogue and numerical studies are powerful tools to gain insight on the subduction process. Here we investigate some results from both approaches in order to characterize the induced flow triggered in the mantle by slab motion. The fluid velocity field in our 3-D laboratory experiments is reconstructed and analyzed through the PTV (Particle Tracking Velocimetry) image analysis technique, which provides a set of velocity vectors centred with particle centroid positions. Numerical investigation is approached by means of the finite element code Citcom (e.g. Moresi & Solomatov, 1995, Zhong et al., 1998; obtained from geoframework.org), solving the equations for conservation of mass, momentum and energy for an incompressible viscous spherical shell.
DE: 8120 Dynamics of lithosphere and mantle--general
DE: 8121 Dynamics, convection currents and mantle plumes
SC: Tectonophysics [T]
MN: 2004 AGU Fall Meeting