Ring-shear test data of quartz sand – silicate cenospheres mixtures used for analogue experiments at the Institute of Geophysics of the Czech Academy of Science, Prague

10.5880/fidgeo.2021.024 Warsitzka, Michael Michael Warsitzka 0000-0003-1774-5888 Institute of Geophysics, Czech Academy of Sciences, Prague, Czech Republic Závada, Prokop Prokop Závada 0000-0003-1702-3770 Institute of Geophysics, Czech Academy of Sciences, Prague, Czech Republic Krýza, Ondřej Ondřej Krýza 0000-0003-3324-9251 Institute of Geophysics, Czech Academy of Sciences, Prague, Czech Republic Pohlenz, Andre Andre Pohlenz GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Ring-shear test data of quartz sand – silicate cenospheres mixtures used for analogue experiments at the Institute of Geophysics of the Czech Academy of Science, Prague GFZ Data Services 2021 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 Iron Powder Ring-shear tester Sand > Quartz Sand tectonic and structural features Warsitzka, Michael Michael Warsitzka 0000-0003-1774-5888 Institute of Geophysics, Czech Academy of Sciences, Prague, Czech Republic Závada, Prokop Prokop Závada 0000-0003-1702-3770 Institute of Geophysics, Czech Academy of Sciences, Prague, Czech Republic Krýza, Ondřej Ondřej Krýza 0000-0003-3324-9251 Institute of Geophysics, Czech Academy of Sciences, Prague, Czech Republic Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Laboratory of the Institute of Geophysics (Czech Academy of Science, Czech Republic) Institute of Geophysics of the Czech Academy of Sciences, Prague, Czech Republic 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 2021-05-21 Dataset 10.1016/j.tecto.2016.01.017 10.1002/2016JB012915 10.3389/feart.2018.00248 https://gitext.gfz-potsdam.de/analab-code/rst-evaluation/ 10.1016/j.jsg.2015.03.008 10.1002/ceat.200303112 978-3-540-73767-4 10.5880/GFZ.4.1.2019.008 10.5194/se-12-1987-2021 1 CC BY 4.0 This dataset provides friction data from ring-shear tests (RST) for mixtures of quartz sand and sili-cate cenospheres, which are used for analog experiments in the laboratory of the Institute of Geo-physics of the Czech Academy of Science (IG CAS) (Warsitzka et al., 2021). The mixtures have been characterized by means of internal friction coefficients µ and cohesion 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. Peak friction coefficients µP of the tested materials range between 0.55 and 0.75, dynamic friction coefficients µD between 0.47 and 0.60 and reactivation friction coefficients µR be-tween 0.52 and 0.65. Cohesions of the materials vary between 20 and 120 Pa. The materials show a minor rate-weakening of <1.2% per ten-fold change in shear velocity v.