Feldspar Sand Ring-Shear Test Data for Analogue Tectonic Modelling

Ring-shear test data characterizes a feldspar sand used as an analogue for brittle crustal layers in tectonic experiments. The material, analyzed by the Helmholtz Laboratory for Tectonic Modelling, behaves as a Mohr-Coulomb material with reported internal friction coefficients and cohesions. The dataset originates from the CNR-IGG Tectonic Modelling Laboratory at the University of Florence.

Use Cases

• Calibrating numerical models of crustal deformation based on reported Mohr-Coulomb parameters.
• Comparing material properties for analogue tectonic experiments based on the provided friction coefficients and cohesions.
• Validating empirical methods for determining geomechanical properties against direct shear test data.

Strengths

• Provides specific material property values: internal peak (μP=0.72), dynamic (μD=0.67), and reactivation (μR=0.72) friction coefficients.
• Reports a quantified range for internal cohesion C (60 to 120 Pa).
• Explicitly notes discrepancies with prior empirical property determinations, aiding critical assessment.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

Tectonic Modelling Laboratory of CNR-IGG at the Earth Sciences Department of the University of Florence (Italy); material characterization by Helmholtz Laboratory for Tectonic Modelling (HelTec) at GFZ.

Collection Method

Ring-shear tests (RST) performed on feldspar sand material.