| Abstract: | Consideration of the Voronezh Crystalline Massif shows that three-layered seismic models and velocity profiles with a characteristic distribution of layer velocities and their gradients in each layer, reflect a crystalline crust and uppermost mantle structure formed through regional metamorphism and magmatism processes.Velocity and seismic parameter vertical gradients from the lithosphere profile are several times higher than those for homogeneous compression of minerals and rocks.For the identified layers the contribution of different factors for each seismic parameter gradient value is estimated. Anomalously high rates of increase with depth for Vp, Vs and ø are shown to be caused by the combined effects of structure-phase transformations and substance composition variations in lithospheric complex mineral parageneses. |
