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Conference Poster Year : 2017

Subduction initiation without a prescribed weak zone: What’s gonna happen?

Philippe Yamato
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  • PersonId : 838583

Abstract

Subduction initiation is one of the main unclear aspect of plate tectonics. When studying subduction processes, subduction initiation is therefore generally avoided as it constitutes a problem in itself. The easiest way to avoid this problem in numerical models is to start the simulations with either a pre-existing subduction zone or a pre-existing weak suture zone. In the Wilson cycle, as subduction initiation is often supposed to correspond to the first stage when an oceanic lithosphere formed during extension turn in compression, we here present 2D thermo-mechanical models of continental rifting followed by compression. While some of the models evolve toward subduction(s), they often do not occur at the expected location. This poster aims to discuss the results obtained in such models and the consequences of prescribing initial weak suture zones in the numerical models.

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Tectonics
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Dates and versions

insu-01510178 , version 1 (19-04-2017)

Identifiers

  • HAL Id : insu-01510178 , version 1

Cite

Philippe Yamato, Thibault Duretz. Subduction initiation without a prescribed weak zone: What’s gonna happen?. European Geosciences Union General Assembly 2017, Apr 2017, Vienne, Austria. Geophysical Research Abstracts, 19, pp.EGU2017-11608, 2017. ⟨insu-01510178⟩
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