Data Publication

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

GFZ Data Services

(2023)

Descriptions

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).

Keywords

Originally assigned keywords

EPOS

multi-scale laboratories

analogue models of geologic processes

property data of analogue modelling materials

Cohesion

deformation > shearing

fault

Friction coefficient

Ring-shear tester

Corresponding MSL vocabulary keywords

cohesion

friction coefficient

frictional deformation

friction coefficient

MSL enriched keywords

Measured property

friction - controlled slip rate

cohesion

Measured property

friction - controlled slip rate

cohesion

friction coefficient

Inferred deformation behavior

deformation behaviour

frictional deformation

friction coefficient

minerals

silicate minerals

nesosilicates

garnet

unconsolidated sediment

clastic sediment

sand

Apparatus

deformation testing

shear testing

rotary shear apparatus

Apparatus

analogue modelling

characterization of modelling material

frictional property determination

rotary shear apparatus

brittle deformation

deformation experiments

Earth's structure

Earth crust

upper crust

MSL enriched sub domains

rock and melt physics

analogue modelling of geologic processes

Resource Type

Dataset

Source

https://dataservices.gfz.de/panmetaworks/showshort.php?id=5bac52ce-757c-11ee-967a-4ffbfe06208e

Source publisher

GFZ Data Services

DOI

10.5880/gfz.4.1.2023.010