Unfortunately this page does not have a mobile or narrow screen view. Please switch to a desktop computer or increase the size of your browser. For tablets try flipping the screen.
Data Publication
Experimental data of analogue models addressing the influence of oblique convergence and inheritance on sliver tectonics
Suárez, Rodrigo Javier | Guillaume, Benjamin | Martinod, Joseph | Ghiglione, Matías | Sue, Christian | Kermarrec, Jean-Jacques
GFZ Data Services
(2022)
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.
Keywords
Originally assigned keywords
Corresponding MSL vocabulary keywords
MSL enriched keywords
MSL original sub domains
MSL enriched sub domains i
Source publisher
GFZ Data Services
DOI
10.5880/fidgeo.2022.013
Authors
Suárez, Rodrigo Javier
Instituto de Estudios Andinos (Universidad de Buenos Aires - CONICET), Buenos Aires, Argentina.
Guillaume, Benjamin
0000-0002-4260-3155
Université de Rennes, CNRS, Géosciences Rennes, Géosciences Rennes, Rennes, France
Martinod, Joseph
0000-0003-0891-5232
ISTerre, Université de Savoie Mont-Blanc, Le Bourget du Lac cedex, France
Ghiglione, Matías
Instituto de Estudios Andinos (Universidad de Buenos Aires - CONICET), Buenos Aires, Argentina.
Sue, Christian
0000-0002-2472-5001
Chrono-environnement, CNRS-UMR6249, Université de Franche-Comté, Besançon cedex, France
Kermarrec, Jean-Jacques
Université de Rennes, CNRS, Géosciences Rennes, Géosciences Rennes, Rennes, France
References
to be updated when DOI available
IsSupplementTo
Contact
Suárez, Rodrigo Javier
rsuarez@gl.fcen.ubar.ar
Instituto de Estudios Andinos (Universidad de Buenos Aires - CONICET), Buenos Aires, Argentina.
Guillaume, Benjamin
benjamin.guillaume@univ-rennes1.fr
University of Rennes, CNRS, Géosciences Rennes, UMR 6118, Rennes, France
Citiation
Suárez, R. J., Guillaume, B., Martinod, J., Ghiglione, M., Sue, C., & Kermarrec, J.-J. (2022). Experimental data of analogue models addressing the influence of oblique convergence and inheritance on sliver tectonics [Data set]. GFZ Data Services. https://doi.org/10.5880/FIDGEO.2022.013