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

Rosenau, M.; Kemnitz, H.; Pohlenz, Andre; Warsitzka, Michael; Zavada, Prokop

doi:10.5880/GFZ.4.1.2022.002

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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

Authors

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Rosenau, M.
4.1 Lithosphere Dynamics, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/heke

Kemnitz, H.
4.1 Lithosphere Dynamics, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/apohlenz

Pohlenz, Andre
4.1 Lithosphere Dynamics, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Warsitzka, Michael
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Zavada, Prokop
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Citation

Rosenau, M., Kemnitz, H., Pohlenz, A., Warsitzka, M., Zavada, P. (2022): 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.
https://doi.org/10.5880/GFZ.4.1.2022.002

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5014533

Abstract

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.