Ring-shear test data of glass beads 200-300 µm used for analogue experiments in the tectonic modelling labs at GFZ Potsdam and the Institute of Geophysics of the Czech Academy of Science, Prague

10.5880/GFZ.4.1.2022.002 Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Kemnitz, Helga Helga Kemnitz GFZ German Research Centre for Geosciences, Potsdam, Germany Pohlenz, Andre Andre Pohlenz GFZ German Research Centre for Geosciences, Potsdam, Germany Warsitzka, Michael Michael Warsitzka 0000-0003-1774-5888 Institute of Geophysics, Czech Academy of Sciences, Prague, Czech Republic Bundesgesellschaft für Endlagerung mbH (BGE), Peine, Germany Zavada, Prokop Prokop Zavada 0000-0003-1702-3770 Institute of Geophysics, Czech Academy of Sciences, Prague, Czech Republic Ring-shear test data of glass beads 200-300 µm used for analogue experiments in the tectonic modelling labs at GFZ Potsdam and the Institute of Geophysics of the Czech Academy of Science, Prague GFZ Data Services 2022 EPOS TCS MSL analogue models of geologic processes multi-scale laboratories property data of analogue modelling materials analogue modelling results software tools Cohesion deformation > shearing fault Friction coefficient Microspheres > Glassy Ring-shear tester Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Kemnitz, Helga Helga Kemnitz GFZ German Research Centre for Geosciences, Potsdam, Germany Kemnitz, Helga Helga Kemnitz GFZ German Research Centre for Geosciences, Potsdam, Germany Pohlenz, Andre Andre Pohlenz GFZ German Research Centre for Geosciences, Potsdam, Germany Pohlenz, Andre Andre Pohlenz GFZ German Research Centre for Geosciences, Potsdam, Germany Pohlenz, Andre Andre Pohlenz GFZ German Research Centre for Geosciences, Potsdam, Germany Warsitzka, Michael Michael Warsitzka 0000-0003-1774-5888 Institute of Geophysics, Czech Academy of Sciences, Prague, Czech Republic Bundesgesellschaft für Endlagerung mbH (BGE), Peine, Germany HelTec - Helmholtz Laboratory for Tectonic Modelling (GFZ German Research Centre for Geosciences, Germany) 9ba34c109b827b177aab36e0266b1643 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau GFZ German Research Centre for Geosciences, Potsdam, Germany Dataset 10.1016/j.tecto.2016.01.017 10.1016/S0191-8141(03)00005-1 10.1002/2016JB012915 10.1029/2021GC009825 https://gitext.gfz-potsdam.de/analab-code/rst-evaluation/ 10.1002/ceat.200303112 CC BY 4.0 This dataset provides friction data from ring-shear tests on glass beads with a diameter of 200-300 µm used in analogue modelling of tectonic processes as a rock analogue for “weak” layers in the earth’s upper crust (e.g. Klinkmüller et al., 2016; Ritter et al., 2016; Lohrmann et al., 2003) or as “seismogenic” crust (Rudolf et al., 2022). The glass beads are characterized by means of internal friction coefficients µ and cohesion C.
According to our analysis the materials show a Mohr-Coulomb behaviour characterized by a linear failure envelope. Peak, dynamic and reactivation friction coefficients of the glass beads are µP = 0.51 , µD = 0.40, and µR = 0.44, respectively (Table 5). Cohesion of the material ranges between 40 Pa and 70 Pa. The material shows a minor rate-weakening of ~1% per ten-fold change in shear velocity v and a stick-slip behaviour at low shear velocities and at high loads.
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 (<20 kPa) and shear velocities (<1 mm/sec) similar to sandbox experiments. In this tester, a granular bulk material layer is sheared internally at constant normal stress σN and shear velocity v while shear force and lid displacement (corresponding to density and volume change ΔV) are measured continuously. For more details see Klinkmüller et al. (2016) and Ritter et al. (2016).