10.5880/fidgeo.2021.023 eng dataset GFZ German Research Centre for Geosciences datapub@gfz-potsdam.de http://www.gfz-potsdam.de Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences pointOfContact 2023-11-09 urn:ogc:def:crs:EPSG:4326 Experimental data on scaled analogue experiments modelling GPS velocity field variations and kinematic partitioning in the Southern Andes (34°S to 42°S) 2023-11-09 revision 2021-04-20 creation doi:10.5880/fidgeo.2021.023 Eisermann, Jan Oliver Universität Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany author Göllner, Paul Leon Universität Hamburg, Hamburg, Germany author Riller, Ulrich Universität Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany author Analogue modelling laboratory (University Hamburg, Germany) Universität Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany originator GFZ Data Services publisher The southern Andes are regarded as a typical subduction orogen formed by oblique plate convergence. Despite decades of studies, there is considerable uncertainty as to how deformation is kinematically partitioned in the upper plate. Using scaled analogue experiments modelling, we test the concept of dextral transpression for this orogen. We advocate that the GPS velocity field portrays interseismic deformation related to deformation of strong crust north, and weak crust south, of 37°S. Contrary to the popular hypotheses that the Liquiñe-Ofqui Fault Zone, a prominent intra-arc deformation zone, takes up most of the plate boundary-parallel dextral strike-slip, we find that dextral transpression affects the entire model orogen through tectonic segmentation of crust. Moreover, prominent, regularly spaced sinistral oblique-slip thrust faults, interpreted as antithetic Riedel shears, developed spontaneously in all of our experiments and call into question the general believe that their NW-striking natural equivalents formed from pre-Andean discontinuities. Our experiments prompt us to reconsider the apparently well-established geodynamic concept that strain and margin-parallel displacement is localized on a few margin-parallel faults in the southern Andes. Riller, Ulrich Universität Hamburg, Hamburg, Germany Researcher ulrich.riller@uni-hamburg.de http://https://www.geo.uni-hamburg.de/geologie/personen/riller-ulrich.html informtion pointOfContact GPS velocity field kinematic partitioning Strain partitioning Southern Andes Transpression oblique plate convergence analogue experiment modeling Liquiñe-Ofqui Fault Zone interseismic deformation Multibox EPOS European Plate Observing System multi-scale laboratories analogue models of geologic processes analog modelling results Digital Image Correlation (DIC) / Particle Image Velocimetry (PIV) > StrainMaster (La Vision GmbH) EPOS WP16 Analogue Software publication EARTH SCIENCE > SOLID EARTH > GEODETICS EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > STRAIN EARTH SCIENCE SERVICES > MODELS > GEOLOGIC/TECTONIC/PALEOCLIMATE MODELS NASA/GCMD Earth Science Keywords publication fault > oblique slip fault fault > strike-slip fault normal fault EPOS WP16 Analogue Geologic Structure publication geologic process tectonic process > orogenic process EPOS WP16 Analogue Process/Hazard publication Glass/Plexiglas box > Glass/Plexiglas box (meter scale) Sandbox > Sandbox (meter scale) Shear box Squeeze box EPOS WP16 Analogue Apparatus publication Microspheres > Glassy Sand > Corundum Sand Sand > Quartz Sand Silicon/Silly putty/PDMS EPOS WP16 Analogue Material publication Surface image EPOS WP16 Analogue Measured Property publication tectonic and structural features EPOS WP16 Analogue Geologic Feature publication tectonic setting > back arc setting tectonic setting > plate margin setting > active continental margin setting tectonic setting > plate margin setting > volcanic arc setting EPOS WP16 Analogue Main Setting publication Time lapse camera EPOS WP16 Analogue Monitoring publication CC BY 4.0 CC BY 4.0 10.1038/s43247-021-00241-4 DOI IsSupplementTo eng geoscientificInformation study area represented by the model -74.4747 -68.4103 -42.1428 -34.2115 http://doi.org/10.5880/fidgeo.2021.023 WWW:LINK-1.0-http--link Data Access - DOI Data Access - DOI information