Earth flows: Magma movements in a deforming crust
Thema 1 of the EarthFlow project will be presented by Olivier Galland (PGP, UiO), Atle Jensen (Department of Mathematics, UiO) and Martin Dabrowski (PGP, UiO).
The flow of magma in the Earth’s crust involves flowing viscous magma that interplays with host rock of visco-elasto-plastic rheology through the moving magma/host interface (Fig.2) [Lister and Kerr, 1991; Rubin, 1993]. The complexity of such systems controls the formation of magma conduits of contrasting shapes (dykes, sills, cone sheets, laccoliths, plutons, etc) [Philpotts, 1990; Petford, 1996; Miller and Paterson, 1999], each of them corresponding to a distinct physical regime of the magma/host rock system [Galland et al., 2014]. The processes controlling these systems are neither governed by the viscous flow of the magma nor the deforming host rock alone [Rubin, 1993], but by the mechanical interplay that occurs through the moving interface between them. The aim of the proposed project is to design a novel mechanical model of magma flow through the Earth’s crust that accounts for:
1. The dynamics of the flowing melt
2. The complex rheology of the deforming host rock
3. The overall the moving magma/host rock interface