Ring shear test data of glass beads 70-110 µm used for analogue experiments in the Helmholtz Laboratory for Tectonic Modelling (HelTec) at the GFZ German Research Centre for Geosciences in Potsdam

Abstract

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 70-110 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 = 0.48, µD = 0.39 and µR = 0.44, respectively. Cohesion ranges between 3 and 28 Pa. A rate-weakening of ~4 % per ten-fold change in shear velocity v is evident.

Authors

• Pohlenz, Andre;GFZ German Research Centre for Geosciences, Potsdam, Germany
• Rudolf, Michael;GFZ German Research Centre for Geosciences, Potsdam, Germany
• Kemnitz, Helga;GFZ German Research Centre for Geosciences, Potsdam, Germany
• Rosenau, Matthias;GFZ German Research Centre for Geosciences, Potsdam, Germany

Contact

• Rosenau, Matthias (Lab manager) ; GFZ German Research Centre for Geosciences, Potsdam, Germany; ➦

Contributors

HelTec - Helmholtz Laboratory for Tectonic Modelling (GFZ German Research Centre for Geosciences, Germany)

Keywords

EPOS, multi-scale laboratories, analogue models of geologic processes, Cohesion, Friction coefficient, deformation > fracturing, detachment fault, fault, thrust fault, wrench fault, earth interior setting > crust setting > continental-crustal setting > upper continental crustal setting, Force sensor, Python, Ring-shear tester, tectonic and structural features, Cohesion, Force sensor, Friction coefficient, Python, Ring-shear tester, deformation > fracturing, detachment fault, earth interior setting > crust setting > continental-crustal setting > upper continental crustal setting, fault, tectonic and structural features, thrust fault, wrench fault

GCMD Science Keywords

• EARTH SCIENCE > SOLID EARTH > TECTONICS
• EARTH SCIENCE SERVICES > DATA ANALYSIS AND VISUALIZATION > CALIBRATION/VALIDATION