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Origin and Orientation of Microporosity in Eclogites of Different Microstructure Studied by Ultrasound and Microfabric Analysis by M. Machek; P. Špaček; S. Ulrich; F. Heidelbach is a Engineering article available to read on EtoBox.

What is Origin and Orientation of Microporosity in Eclogites of Different Microstructure Studied by Ultrasound and Microfabric Analysis about?

This work contributes to the experimental investigations of the origin and 3-D orientation of micropores in low porosity crystalline rocks. The origin and spatial orientation of microporosity in two eclogites with different microstructures were studied by 1) quantitative and qualitative microstructural analysis of grains and grain boundaries, 2) measurement of lattice preferred orientation using the SEM-EBSD method and 3) experimental measurement of velocity of elastic P-waves in spherical samples in 132 directions under confining pressures up to 400 MPa. Results show good correlation between the elastic properties and the orientation of grain boundaries and cleavage planes in clinopyroxene. The magnitude and anisotropy of velocity change with pressure shows that microporosity in the fine-grained sample is relatively large and strongly preferentially oriented, whereas it is significantly lower and less preferentially oriented in the coarse-grained sample. Seeing that the lattice preferred orientation of clinopyroxene is similar in both samples we can deduce from velocity changes that the grain size of the rock forming minerals controls the amount of microporosity. Also, the orienta

Who reads Origin and Orientation of Microporosity in Eclogites of Different Microstructure Studied by Ultrasound and Microfabric Analysis?

Author

M. Machek; P. Špaček; S. Ulrich; F. Heidelbach

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0013-7952)

Published

2007

Language

EN

Field

Engineering (Physical Sciences)