10.5880/fidgeo.2019.025 Román-Berdiel, Teresa Teresa Román-Berdiel 0000-0002-9743-8695 Departamento de Ciencias de la Tierra, Universidad de Zaragoza Casas, Antonio M. Antonio M. Casas 0000-0003-3652-3527 Departamento de Ciencias de la Tierra, Universidad de Zaragoza Pueyo, Emilio Luis Emilio Luis Pueyo 0000-0002-0504-2352 Instituto Geológico y Minero de España Peiro Chamarro, Alba Alba Peiro Chamarro Departamento de Ciencias de la Tierra, Universidad de Zaragoza Soto, Ruth Ruth Soto 0000-0002-1929-8850 Instituto Geológico y Minero de España Pohlenz, Andre Andre Pohlenz 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 2019 EPOS multi-scale laboratories analogue models of geologic processes property data of analogue modelling materials 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 Ring-shear tester Sand > Quartz Sand tectonic and structural features thrust fault wrench fault Laboratorio de Modelizaci\u00f3n Anal\u00f3gica (Universidad de Zaragoza-IGME 84af0ba9f213bc36b12db7903c31e358 Universidad de Zaragoza-IGME, Zaragoza, Spain HelTec - Helmholtz Laboratory for Tectonic Modelling (GFZ German Research Centre for Geosciences, Germany) 9ba34c109b827b177aab36e0266b1643 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias GFZ German Research Centre for Geosciences, Potsdam, Germany Dataset http://hdl.handle.net/10272/7176 10.1016/j.tecto.2016.01.017 http://www.ub.edu/geomod2018/Program_files/Abstracts_book_v1.0_LR.pdf https://dialnet.unirioja.es/servlet/articulo?codigo=5779639 https://meetingorganizer.copernicus.org/EGU2018/EGU2018-10534-2.pdf 10.1002/2016JB012915 10.1016/j.jsg.2015.03.008 10.1002/ceat.200303112 https://www.springer.com/de/book/9783540737674 CC BY 4.0 This dataset provides friction data from ring-shear tests (RST) on different types of quartz sand used in the Laboratorio de modelización analógica of the Universidad de Zaragoza (UZ, Spain) as an analogue for brittle layers in the crust or lithosphere (Izquierdo-Llavall & Casas-Sainz, 2012; Calvín et al., 2013; Pueyo Anchuela et al., 2016; Peiro et al., 2018; Pueyo et al., 2018; Izquierdo-Llavall et al., submitted). The materials (quartz sand, green coloured quartz sand mixture, black coloured quartz sand) 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 the materials show a Mohr-Coulomb behaviour characterized by a linear failure envelope. Friction coefficients of the pure quartz sand and the green quartz sand mixture are similar (µP = 0.74 – 0.76, µD = 0.56 – 0.60, µR = 0.61 – 0.64), whereas friction coefficients of the black coloured quartz sand are lower (µP = 0.48, µD = 0.39, µR = 0.45). Cohesions of all sands range between 40 and 150 Pa. A minor rate-weakening of ~1 % per ten-fold change in shear velocity v is evident.


The tested materials are quartz sands with a grain size of 0.063 – 0.4 mm and bulk densities of ρ = 1610-1800 kg m^-3. The data presented here are derived by ring shear testing using a SCHULZE RST-01.pc (Schulze, 1994, 2003, 2008) at the Helmholtz Laboratory for Tectonic Modelling (HelTec) of the GFZ German Research Centre for Geosciences in Potsdam. The RST is specially designed to measure friction coefficients µ and cohesions C in loose granular material accurately at low confining pressures and shear velocities similar to sandbox experiments.