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http://hdl.handle.net/2122/2405| Authors: | Piromallo, C.* Becker, T. W.* Funiciello, F.* Faccenna, C.* |
Title: | Three-dimensional instantaneous mantle flow induced by subduction | Journal: | Geophys. Res. Lett. | Series/Report no.: | /33 (2006) | Publisher: | Agu | Issue Date: | 2006 | DOI: | 10.1029/2005GL025390 | Keywords: | mantle flow subduction |
Subject Classification: | 04. Solid Earth::04.01. Earth Interior::04.01.03. Mantle and Core dynamics | Abstract: | We conduct three-dimensional subduction experiments by a finite element approach to study flow around slabs, which are prescribed based on a transient stage of upper mantle subduction from a laboratory model. Instantaneous velocity field solutions are examined, focusing on the toroidal vs. poloidal components as a function of boundary conditions, plate width, and viscosity contrast between slab and mantle. We show how the slab-to-mantle viscosity ratio determines the strength of toroidal flow, and find that the toroidal flow component peaks for slab/mantle viscosity ratios ~100 independent of slab width or geometry. |
| Appears in Collections: | Article published / in press |
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