July 1, 2016 - Jessica M Warren

Experimental results on olivine anisotropic viscosity published

Mantle anisotropic viscosity results from the crystallographic alignment of olivine and influences a variety of large-scale geodynamic processes. This study, lead by Lars Hansen, presents torsion and extension experiments on pre-textured olivine aggregates to provide constraints on olivine viscous anisotropy. We found that the magnitude of anisotropy is similar among the different deformation geometries tested. These results form part of a new database for calibrating micromechanical models of olivine deformation.

Hansen, L.N., J.M. Warren, M.E. Zimmerman, and D.L. Kohlstedt. Viscous anisotropy of textured olivine aggregates, Part 1: Measurement of the magnitude and evolution of anisotropy, Earth and Planetary Science Letters, 445, 92-103, doi:10.1016/j.epsl.2016.04.008.