Dataset

Ring-shear test data of garnet sand used for analogue modelling in the experimental tectonics laboratory at GFZ German Research Centre for Geosciences, Potsdam

Rosenau, Matthias; Pohlenz, Andre;

2023-11 || GFZ Data Services

This dataset provides friction data from ring-shear tests on garnet sand used in analogue modelling of tectonic processes as a rock analogue for “strong” or “high density” layers in the earth’s upper crust (e.g. Klinkmüller et al., 2016).

According to our analysis the material shows a Mohr-Coulomb behaviour characterized by a linear failure envelope. Peak, dynamic and reactivation friction coefficients of garnet sand are µP = 0.83, µD = 0.61, and µR = 0.73, respectively (Table 5). Cohesion of the material ranges between 20-120 Pa. The material shows a no significant rate-dependency.

The data presented here are derived by ring shearspan> testing using a SCHULZE RST-01.pc (Schulze, 1994, 2003, 2008) at HelTec, the Laboratory for experimental tectonics at the Helmholtz Center Potsdam – GFZ German Research Centre for Geosciences in Potsdam, Germany. 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).

Originally assigned keywords

Corresponding MSL vocabulary keywords

MSL enriched keywords

Originally assigned sub domains

analogue modelling of geologic processes

MSL enriched sub domains	rock and melt physics analogue modelling of geologic processes
Source	http://doi.org/10.5880/GFZ.4.1.2023.010
Source publisher	GFZ Data Services
DOI	10.5880/GFZ.4.1.2023.010
License	CC BY 4.0
Authors	Rosenau, Matthias 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Pohlenz, Andre GFZ German Research Centre for Geosciences, Potsdam, Germany
References	DOI of paper when available IsSupplementTo Klinkmüller, M., Schreurs, G., Rosenau, M., & Kemnitz, H. (2016). Properties of granular analogue model materials: A community wide survey. Tectonophysics, 684, 23–38. https://doi.org/10.1016/j.tecto.2016.01.017 10.1016/j.tecto.2016.01.017 Cites Rudolf, M., & Warsitzka, M. (2021). RST Evaluation - Scripts for analysing shear experiments from the Schulze RST.pc01 ring shear tester. GFZ Data Services. https://doi.org/10.5880/GFZ.4.1.2021.001 10.5880/GFZ.4.1.2021.001 Cites Santimano, T., Rosenau, M., & Oncken, O. (2015). Intrinsic versus extrinsic variability of analogue sand-box experiments – Insights from statistical analysis of repeated accretionary sand wedge experiments. Journal of Structural Geology, 75, 80–100. https://doi.org/10.1016/j.jsg.2015.03.008 10.1016/j.jsg.2015.03.008 Cites Schulze, D. (2003). Time‐ and Velocity‐Dependent Properties of Powders Effecting Slip‐Stick Oscillations. Chemical Engineering & Technology, 26(10), 1047–1051. Portico. https://doi.org/10.1002/ceat.200303112 10.1002/ceat.200303112 Cites Powders and Bulk Solids. (2007). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-540-73768-1 10.1007/978-3-540-73768-1 Cites
Contact	Rosenau GFZ German Research Centre for Geosciences, Potsdam, Germany rosen@potsdam.de
Citation	Rosenau, M., & Pohlenz, A. (2023). Ring-shear test data of garnet sand used for analogue modelling in the experimental tectonics laboratory at GFZ German Research Centre for Geosciences, Potsdam [Data set]. GFZ Data Services. https://doi.org/10.5880/GFZ.4.1.2023.010