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false4DOIDB.GFZ 10.5880/GFZ.4.1.2020.006 Pohlenz, Andre Andre Pohlenz GFZ German Research Centre for Geosciences, Potsdam, Germany Rudolf, Michael Michael Rudolf 0000-0002-5077-5221 GFZ German Research Centre for Geosciences, Potsdam, Germany Kemnitz, Helga Helga Kemnitz 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 2020 EPOS Multi-scale laboratories analogue models of geologic processes Cohesion deformation > fracturing detachment fault 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 Python Ring-shear tester tectonic and structural features thrust fault wrench fault Pohlenz, Andre Andre Pohlenz GFZ German Research Centre for Geosciences, Potsdam, Germany Rudolf, Michael Michael Rudolf 0000-0002-5077-5221 GFZ German Research Centre for Geosciences, Potsdam, Germany Kemnitz, Helga Helga Kemnitz GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias Matthias Rosenau 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany HelTec - Helmholtz Laboratory for Tectonic Modelling (GFZ German Research Centre for Geosciences, Germany) GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias GFZ German Research Centre for Geosciences, Potsdam, Germany Dataset 10.1016/j.tecto.2011.09.016 10.5880/GFZ.4.1.2018.003 10.1130/2006.2398(12) 10.1029/2006JB004357 10.1111/j.1945-5100.2007.tb00556.x 10.1016/j.tecto.2016.01.017 10.1016/j.epsl.2010.12.002 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 10.5880/GFZ.4.1.2019.002 978-3-540-73767-4 https://gitext.gfz-potsdam.de/analab-code/rst-evaluation/ CC BY 4.0 This dataset provides friction data from ring-shear tests (RST) on glass beads used in the Helmholtz Laboratory for Tectonic Modelling (HelTec) at the GFZ German Research Centre for Geosciences in Potsdam as an analogue for “weak” brittle layers in the crust or lithosphere (Ritter et al., 2016; Santimano et al., 2015; Contardo et al., 2011; Reiter et al., 2011; Hoth et al., 2007, 2006; Kenkmann et al., 2007; Deng et al., 2018) or in stick-slip experiments (Rudolf et al., 2019). The glass beads with a diameter of 40-70 µm 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 material shows a Mohr-Coulomb behaviour characterized by a linear failure envelope. Peak, dynamic and reactivation friction coefficients of the glass beads are µP = 0.46, µD = 0.40 and µR = 0.44, respectively. Cohesion ranges between 33 and 42 Pa. A rate-weakening of ~3 % per ten-fold change in shear velocity v is evident.