On the correlation between the acoustic anisotropy and the magnetic susceptibility anisotropy of the rocks.

Abstract

Using resonant acoustic spectroscopy technique, we studied several rock samples. Acoustic data were compared with the data for magnetic susceptibility of the same samples. The correlation between the acoustic anisotropy and the magnetic susceptibility anisotropy has been revealed for samples of metamorphic and sedimentary rocks. The existence of this correlation points to the same origin for both magnetic and acoustic anisotropy. The origin is the rock texture created during long tectonic history of the rock samples analyzed. The value of acoustic anisotropy allows evaluating the rock fracturing or the amplitude of tectonic stresses. Under additional calibration, it makes possible the use of the magnetic susceptibility value as a measure of tectonic processes intensity. The latter can be very useful to create express diagnostics of tectonic history in the field conditions.