Physical properties of crustal and upper mantle rocks with regards to lithosphere dynamics and high pressure mineralogy

Details Physical properties of crustal and upper mantle rocks with regards to lithosphere dynamics and high pressure mineralogy Physical properties of crustal and upper mantle rocks with regards to lithosphere dynamics and high pressure mineralogy

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pepi...79..113k&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 79, Issue 1-2, p. 113-136.

Physics

17

Scientific paper

This paper focusses on the physical properties of rocks and property changes occurring during geodynamic processes. It addresses a number of outstanding petrophysical problems in the framework of crustal and mantle deformation. The major themes to be discussed will be the seismic signature of crustal and mantle shear zones, the nature of crustal and mantle anisotropy and the contribution of anisotropic rocks to seismic reflectivity. In particular, seismic shear waves traversing anisotropic strata can reveal important information on the spatial orientation of deformed structures, because the measured seismic anisotropy has a structural origin. Emphasis will be placed on the relations between shear wave splitting and fabric anisotropy, fabric anisotropy and strain, and strain and geologic/tectonic processes.
The second part of this paper discusses the effect that metamorphic phase transitions, in crustal and mantle rocks, may have on rock physical properties (velocity, density). Specifically, the possible role that the gabbro/eclogite transition could have in crustal delamination and recycling of material into the mantle will be considered.

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