10.5880/fidgeo.2018.072 Willingshofer, Ernst Ernst Willingshofer 0000-0002-9119-5557 Department of Tectonics, Faculty of Earth Sciences, Utrecht University, Utrecht, The Netherlands Sokoutis, Dimitrios Dimitrios Sokoutis 0000-0003-0523-9785 Department of Tectonics, Faculty of Earth Sciences, Utrecht University, Utrecht, The Netherlands Beekman, Fred Fred Beekman 0000-0002-8455-999X Department of Tectonics, Faculty of Earth Sciences, Utrecht University, Utrecht, The Netherlands Schönebeck, Jan-Michael Jan-Michael Schönebeck GFZ German Research Centre for Geosciences, Potsdam, Germany Warsitzka, Michael Michael Warsitzka 0000-0003-1774-5888 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany GFZ Data Services 2018 EPOS multi-scale laboratories analogue models of geologic processes property data of analogue modelling materials software tools Cohesion deformation > fracturing earth interior setting > crust setting > continental-crustal setting > upper continental crustal setting EARTH SCIENCE > SOLID EARTH > TECTONICS EARTH SCIENCE SERVICES > DATA ANALYSIS AND VISUALIZATION > CALIBRATION/VALIDATION fault Force sensor Friction coefficient Iron Powder Ring-shear tester Sand > Quartz Sand tectonic and structural features Willingshofer, Ernst Ernst Willingshofer 0000-0002-9119-5557 Department of Tectonics, Faculty of Earth Sciences, Utrecht University, Utrecht, The Netherlands Sokoutis, Dimitrios Dimitrios Sokoutis 0000-0003-0523-9785 Department of Tectonics, Faculty of Earth Sciences, Utrecht University, Utrecht, The Netherlands Beekman, Fred Fred Beekman 0000-0002-8455-999X Department of Tectonics, Faculty of Earth Sciences, Utrecht University, Utrecht, The Netherlands Schönebeck, Jan-Michael Jan-Michael Schönebeck GFZ German Research Centre for Geosciences, Potsdam, Germany Warsitzka, Michael Michael Warsitzka 0000-0003-1774-5888 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany TecLab - Tectonic Modelling Laboratory (Utrecht University, The Netherlands) aa45f98e5c098237d0c57b58e5f953e1 University, Utrecht, The Netherlands HelTec - Helmholtz Laboratory for Tectonic Modelling (GFZ Potsdam, Germany) 9ba34c109b827b177aab36e0266b1643 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias GFZ German Research Centre for Geosciences, Potsdam, Germany Dataset 10.1144/GSL.SP.2005.243.01.18 10.1002/2016JB012915 10.1016/j.jsg.2015.03.008 10.1002/ceat.200303112 978-3-540-73767-4 10.1016/j.tecto.2016.01.017 10.1111/j.1365-3091.2009.01120.x 10.3389/feart.2018.00148 10.1002/2016TC004424 10.1016/j.epsl.2015.05.022 10.1002/2014TC003756 10.1029/2010TC002719 10.1029/2012TC003122 10.1144/petgeo2015-029 10.1029/2010TC002823 10.1007/s00531-012-0846-4 10.1016/j.epsl.2014.03.036 10.1016/j.tecto.2013.03.009 10.1111/bre.12129 10.1016/j.epsl.2011.03.028 10.1016/j.epsl.2017.05.012 10.1111/sed.12313 10.1130/G25321A.1 10.1144/GSL.SP.2005.243.01.18 10.1130/G34815.1 1 CC BY 4.0 This dataset provides friction data from ring-shear tests (RST) on feldspar sand and quartz sand, which are used to simulate brittle behaviour in crust- and lithosphere-scale analogue experiments at the Tectonic Laboratory (TecLab), Utrecht University (NL) (Willingshofer et al., 2005; Willingshofer & Sokoutis, 2009; Athmer et al., 2010; Luth et al., 2010; Fernández-Lozano et al., 2011; Leever et al., 2011; Sokoutis & Willingshofer, 2011; Fernández-Lozano et al., 2012; Luth et al., 2013; Munteanu et al., 2013; Willingshofer et al., 2013; Munteanu et al., 2014; Calignano et al., 2015a, b; Ortner et al., 2015; Gabrielsen et al., 2016; Calignano et al., 2017; van Gelder et al., 2017; Wang et al., 2017; Beniest et al., 2018 ). The materials have been characterized by means of internal friction coefficients µ and cohesions C as a remote service by the Helmholtz Laboratory for Tectonic Modelling (HelTec) at the GFZ German Research Centre for Geosciences in Potsdam.


According to our analysis both materials show a Mohr-Coulomb behaviour characterized by a linear failure envelope. Peak, dynamic and reactivation friction coefficients of the feldspar sand are µP = 0.68, µD = 0.55, and µR = 0.61, respectively. Friction coefficients of the quartz sand are µP = 0.63, µD = 0.48, and µR = 0.52, respectively. Cohesions of the feldspar sand and the quartz sand are in the order of few tens of Pa. A minor rate-weakening of 1% per ten-fold rate change is evident for the feldspar sand, whereas the quartz sand shows a significant rate weakening of ~5%.


Further information about materical characteristics, measurement procedures, sample preparation, the RST (Ring-shear test) and VST (Velocity stepping test) procedure, as well as the analysed method is proviced in the data description file. The list of files explains the file and folder structure of the data set.