Rheology of synthetic anorthite-diopside aggregates: Implications for ductile shear zones

High-Pressure Equation of State of Molten Anorthite and Diopside

New Hugoniot equation of state data for molten diopside (at 1773 K) and molten anorthite (at 1923 K) are reported to 38 and 35 GPa, respectively. The diopside data (initial density, 2.61 Mg/m s) are described by a straight-line fit to the shock velocity-particle velocity results of Us -3.30 + 1.44 Up km s -1, and our preferred fit to the anorthite data (initial density, 2.55 Mg/m s) is given by...

Turbulent breakage of ductile aggregates.

In this paper we study breakage rate statistics of small colloidal aggregates in nonhomogeneous anisotropic turbulence. We use pseudospectral direct numerical simulation of turbulent channel flow and Lagrangian tracking to follow the motion of the aggregates, modeled as sub-Kolmogorov massless particles. We focus specifically on the effects produced by ductile rupture: This rupture is initially...

Deformation path concepts in strain analysis: Applications for study of ductile shear zones

The internal fabric of a deformed rock represents the state of finite strain. In some special cases the fabrics also record the strain history of the deformed body. These special cases can profitably be utilized to compare the predictions of dynamic models and strain paths in natural deformations. In this contribution, the concept of deformation path in the study of ductile shear zones has been...

Shock compression of liquid silicates to 125 GPa: The anorthite‐diopside join

[1] We determined the equation of state (EOS) of three silicate liquid compositions by shock compression of preheated samples up to 127 GPa. Diopside (Di; Ca2Mg2SiO6) at 1773 K, anorthite (An; CaAl2Si2O8) at 1923 K and the eutectic composition Di64An36 at 1673 K were previously studied by shock compression to 38 GPa. The new data extend the EOS of each composition nearly to the Earth’s core‐man...

Mechanics of low-angle extensional shear zones at the brittle-ductile transition