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www.solid-earth-discuss.net/3/105/2011/
doi:10.5194/sed-3-105-2011
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3-D thermo-mechanical laboratory modelling of plate-tectonics
1Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany
2School of Geosciences, Monash University, Melbourne, VIC 3800, Australia
Abstract. We present an experimental apparatus for 3-D thermo-mechanical analogue modelling of plate-tectonics processes such as oceanic and continental subductions, arc-continent or continental collisions. The model lithosphere, made of temperature-sensitive elasto-plastic with softening analogue materials, is submitted to a constant temperature gradient producing a strength reduction with depth in each layer. The surface temperature is imposed using infrared emitters, which allows maintaining an unobstructed view of the model surface and the use of a high resolution optical strain monitoring technique (Particle Imaging Velocimetry). Subduction experiments illustrate how the stress conditions on the interplate zone can be estimated using a force sensor attached to the back of the upper plate and changed because of the density and strength of the subducting lithosphere or the lubrication of the plate boundary. The first experimental results reveal the potential of the experimental set-up to investigate the three-dimensional solid-mechanics interactions of lithospheric plates in multiple natural situations.
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Notice on Discussion StatusCitation: Boutelier, D. and Oncken, O.: 3-D thermo-mechanical laboratory modelling of plate-tectonics, Solid Earth Discuss., 3, 105-147, doi:10.5194/sed-3-105-2011, 2011. Bibtex EndNote Reference Manager XML
