Constitutive Behavior of Olivine Gouge Across the Brittle-Ductile Transition

Lei Zhang from the University of Southern California studied the mechanical properties of pure olivine gouge across the brittle-ductile transition. The data likely contains stress power exponents measured from 100 to 500ºC under 100 MPa pore-fluid pressure in a triaxial deformation apparatus. The mechanical model captures the gradual evolution from cataclasis to crystal plasticity.

Use Cases

• Calibrating constitutive models for mantle deformation based on temperature-dependent stress exponents.
• Simulating the transition from brittle to ductile behavior in geodynamic models.
• Validating laboratory-derived mechanical laws against field observations of lithospheric deformation.
• Comparing deformation mechanisms like cataclasis and crystal plasticity across temperature regimes.

Strengths

• Stress power exponents are provided with uncertainty estimates (e.g., 70±10, 17±3, 4±2).
• Experiments cover a defined temperature range (100 to 500ºC) and pressure condition (100 MPa).
• The constitutive law incorporates rate, state, and temperature dependencies with multiple thermally activated mechanisms.

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

University of Southern California

Collection Method

Data collected from triaxial deformation apparatus experiments.