Description: This dataset includes video sequences depicting the evolution in map view and lateral view of 7 analogue experiments studying mantle-scale subduction systems. The experiments are performed under a natural gravity field and are designed to understand the role of convergence obliquity on upper plate deformation and partitioning, with a particular emphasis on the role played by lithospheric inherited structures on the development of sliver tectonics. All experiments were performed at the Laboratory of Tectonic modelling of the University of Rennes 1 (France). The experimental set-up corresponds to a lithosphere and sub-lithospheric upper mantle system. The lithospheric plates are simulated with PDMS silicone (Polydimethylsiloxane Silicone) with different viscosities and densities, and the upper mantle with glucose syrup. In particular, for the overriding plate, we simulate the presence of a weaker volcanic arc that can eventually be decoupled from the forearc by a pre-existing discontinuity. The materials are placed into a Plexiglas tank, where the impermeable bottom of the tank represents the 660 km discontinuity. The subduction is initiated by manually forcing the slab into the mantle and it then evolves under the combined effects of internal buoyancy forces (slab pull) and external boundary forces. The subducting plate is pushed toward the trench at a constant velocity of 1.5 cm/min while the overriding plate is maintained fixed during the duration of the experiments. The evolution of the experiments is monitored by DSLR cameras (24 Mpx) taking pictures every 30 seconds at the top and on one side of the experiments. Pictures are then assembled into video-sequences. The scale bar, with black & white rectangles corresponds to 10 cm. The set of experiments consists of one reference model (MODEL-01) with orthogonal convergence, and six models with oblique convergence (Table 1). Among these models, three do not embed a pre-existing lithospheric discontinuity in the overriding plate (MODEL-02, MODEL-03, and MODEL-04) while the three other (MODEL-05, MODEL-06, and MODEL-07) have such a discontinuity. For the models with oblique convergence, we vary the angle between the convergence direction and the trench from 80° (MODEL-02 and MODEL-05) to 60° (MODEL-03 and MODEL-06) and 50° (MODEL-04 and MODEL-07). For details on the experimental set-up, and interpretation of the results, please refer to Suárez et al. (submitted to Tectonophysics) to which these data are supplementary material.
Global identifier:
Doi(
"10.5880/fidgeo.2022.013",
)
Origins: /Wissenschaft/Helmholtz-Gemeinschaft/GFZ
Tags: Amsel ? Kombinationswirkung ? Graben ? Sportinfrastruktur ? Karte ? Modellierung ? Daten ? Modellversuch ? Viskosität ? Lithosphäre ? Time lapse camera ? EPOS ? Fold and thrust belt ? Golden syrup ? Inherited anisotropies ? Interplate friction ? Liquiñe-Ofqui fault system ? Lithospheric strain ? Matlab (Mathworks) ? Nazca plate ? PIVLab software ? Patagonian Andes ? SLR camera ? SSPX software ? Shear force ? Silicon/Silly putty/PDMS ? Slab dip variations ? Slab roll-back ? Sliver tectonics ? Strain partitioning ? Strain tensor ? Strike-slip ? Subduction box ? Subduction dynamics ? Cenozoic times ? Analogue models ? Trac-Trac software ? Traiguén basin ? Trench retreat ? Trench-oblique convergence ? Trench-parallel motion ? Vorticity number ? analogue modelling results ? analogue models of geologic processes ? deformation > ductile flow ? earth interior setting > mantle setting ? fault ? fault > strike-slip fault ? multi-scale laboratories ? property data of analogue modelling materials ? software tools ? tectonic process > subduction ? tectonic setting > plate margin setting > subduction zone setting ? Chile triple junction ? Density ? Digital Image Correlation (DIC) / Particle Image Velocimetry (PIV) ? Digital Image Correlation (DIC) / Particle Image Velocimetry (PIV) > Matlab code ? Digital Image Correlation (DIC) / Particle Image Velocimetry (PIV) > PIVlab ? EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > CRUSTAL MOTION ? EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > FAULT MOVEMENT ? EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > LITHOSPHERIC PLATE MOTION ? EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > PLATE BOUNDARIES ? EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > STRAIN ? Subduction experiments ?
License: cc-by/4.0
Language: Englisch/English
Issued: 2022-01-01
Time ranges: 2022-01-01 - 2022-01-01
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