HAL: hal-00325527, version 1

DOI: 10.1111/j.1365-3121.2008.00815.x

IRD Horizon id: fdi:010042704

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Terra Nova 20 (2008) 267-273

Laboratory experiments of slab break-off and slab dip reversal: insight into the Alpine Oligocene reorganization

Vincent Regard 1, 2, Claudio Faccenna 3, Olivier Bellier 2, Joseph Martinod 1

(2008)

We present laboratory experiments to study the consequence of the rupture of a subducting slab on the deep geometry of the subduction zone. In our experiments, slab break-off occurs after the entrance of buoyant material at trench causing a slowing down of the subduction, and producing an increase of the shortening rate and a transient episode of subduction dip reversal. We discuss the potential application of these processes to the recent collisional evolution of the Alps proposing that the rupture of the slab produced a re-organisation of the belt with a transition from one sided to a doubly vergent orogen.

1:	Laboratoire des Mécanismes et Transfert en Géologie (LMTG)
	CNRS : UMR5563 – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III – Institut de recherche pour le développement [IRD] : UMR154
2:	Centre européen de recherche et d'enseignement de géosciences de l'environnement (CEREGE)
	CNRS : UMR6635 – Institut de recherche pour le développement [IRD] – INSU – Université de Provence - Aix-Marseille I – Université Paul Cézanne - Aix-Marseille III
3:	Dipartimiento di Scienze Geologiche
	Universita di Roma "Tre"

Subject

:

Sciences of the Universe/Earth Sciences

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From: Vincent Regard <>

Submitted on: Thursday, 4 December 2008 12:48:57

Updated on: Thursday, 4 December 2008 17:37:40