Viscous anisotropy of textured olivine aggregates: 2. Micromechanical model

FIRST Ti-XANES ANALYSES OF OLIVINE IN AMOEBOID OLIVINE AGGREGATES

Amoeboid Olivine Aggregates in CR Chondrites

Introduction: Amoeboid Olivine Aggregates (AOAs) are irregular-shaped, fine-grained aggregates of olivine and refractory minerals and are important components of C chondrites. The AOAs in CV chondrites have been interpreted to be primary nebular condensates [1] and therefore, can provide constraints on models for nebular condensation. AOAs are intermediate in composition, and may be a link, bet...

Viscous damping of perforated planar micromechanical structures.

The paper gives an analytical approximation to the viscous damping coefficient due to the motion of a gas between a pair of closely spaced fluctuating plates in which one of the plates contains a regular system of circular holes. These types of structures are important parts of many microelectromechanical devices realized in MEMS technology as microphones, microaccelerometers, resonators, etc.T...

High shear strain of olivine aggregates: rheological and seismic consequences.

High-pressure and high-temperature torsion experiments on olivine aggregates in dislocation creep show about 15 to 20% strain weakening before steady-state behavior, characterized by subgrain-rotation recrystallization and a strong lattice preferred orientation. Such weakening may provide a way to focus flow in the upper mantle without a change in deformation mechanism. Flow laws derived from l...

Amoeboid Olivine Aggregates in the Yamato-86009 Cv3 Chondrite

Fagan, M. Miyamoto, A.N. Krot and T. Mikouchi, The University Museum, University of Tokyo, 7-3-1 Hongo Bunkyo-ku Tokyo, Japan ([email protected]), Department of Earth Sciences, School of Education, Waseda University, 1-6-1 Nishiwaseda Shinjuku-ku Tokyo, Japan, Department of Earth & Planetary Science, University of Tokyo, Japan. Hawaii Institute of Geophysics and Planetology, University o...