The effects of the viscous heating and the hydration of the mantle wedge on the continental crust recycling during the evolution of an ocean/continent subduction system are analysed by using a 2D finite element thermo-mechanical model. The dehydration of the oceanic slab, and the consequent hydration of the mantle wedge, is accomplished by lawsonite breakdown (Roda et al., 2010; Roda et al., 2011). The model shows the activation of convective cells in the mantle wedge that determine the recycling of subducted continental crust. Moreover, with respect to Marotta and Spalla (2007), in which the hydration of the mantle wedge was not taken into account, much more correspondences between P-T predictions and the natural P-T estimates of the Alpine Variscan metamorphism are obtained.

Numerical modelling of an ocean/continent subduction and comparison with Variscan orogeny real data / A.M. Marotta, A. Regorda, M.I. Spalla, M. Roda, G. Rebay. - In: GEOPHYSICAL RESEARCH ABSTRACTS. - ISSN 1029-7006. - 16:(2014 Apr 30), pp. 1-1. ((Intervento presentato al convegno EGU General Assemply tenutosi a Wien nel 2014.

Numerical modelling of an ocean/continent subduction and comparison with Variscan orogeny real data

A.M. Marotta;A. Regorda;M.I. Spalla;M. Roda;
2014

Abstract

The effects of the viscous heating and the hydration of the mantle wedge on the continental crust recycling during the evolution of an ocean/continent subduction system are analysed by using a 2D finite element thermo-mechanical model. The dehydration of the oceanic slab, and the consequent hydration of the mantle wedge, is accomplished by lawsonite breakdown (Roda et al., 2010; Roda et al., 2011). The model shows the activation of convective cells in the mantle wedge that determine the recycling of subducted continental crust. Moreover, with respect to Marotta and Spalla (2007), in which the hydration of the mantle wedge was not taken into account, much more correspondences between P-T predictions and the natural P-T estimates of the Alpine Variscan metamorphism are obtained.
Settore GEO/10 - Geofisica della Terra Solida
Settore GEO/03 - Geologia Strutturale
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/524223
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