1. Lecture MR8 - Weijermars
Day 2: Tools
Analytical Tools
for Modeling
Rock Flow
Ruud Weijermars (PhD, MS, BS)
Lecture MR8
Deformation Paths
Stream Functions
Vorticity Number
Deformation Tensor
Constitutive Equations
Copyright © Alboran Media Group
Modeling Rocks & Tectonic Processes

2. Finite Deformation Patterns
The finite deformation patterns in the Figure occur in the flow fields of after 2 and 4 Ma assuming a characteristic geological strain rate of s-1. The maximum stretches at 4 Ma vary with the direction of plate motion and are largest for smaller ξ (see Weijermars (1991, JSG, v.11, p.1061) for detailed discussion of the difference in efficiency of pure and simple shear deformations). However, the finite strains in he Figure are close to 3, corresponding to those considered characteristic for orogenic strains (Pfiffner and Ramsay, 1982).
Copyright © Alboran Media Group

3. Deformation Paths Copyright © Alboran Media Group
Weijermars, R., The role of stress in ductile deformation.
Journal of Structural Geology, vol. 11, p. 1,061-1,079.
Weijermars, R., Progressive deformation in anisotropic rocks. Journal of Structural Geology, vol. 14, p
Copyright © Alboran Media Group