The basic concept of the investigation is that the anisotropy in the rock physical properties, analyzed concurrently with the tectonic fracturing and the fault-plane solutions from earthquakes may contribute to the explanation of the time-spatial peculiarities of the tectonic stress fields. The considerations for assessment of the influence of the different factors affecting the physical anisotropy of the rocks in the parts of the lithosphere most accessible for direct investigations, prove that anisotropy formation depends mainly on the fracture patterns, the deformations in the vicinity of the faults and the folded structures, and the tectonic stresses in the place of investigation. As far as the tectonic structures result from the action of the paleotectonic stresses in the massif, every in situ investigation of rock fractures and anisotropy is in fact an investigation of the tectonic stresses history in a definite point. The anisotropic characteristics have occurred with varying intensity during the geological history of these rocks, but the earliest tectonic stress field after their formation has been most firmly fixed.


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