| Abstract: | On the basis of DSS data from the recordings of compressional and shear waves made during the Blue Road shootings in 1972, velocity—depth models for the lower lithosphere are presented. A lid with a velocity of 8.32 km/s was found underneath the Mohorovic̆ić discontinuity. An upper-mantle fine structure consisting of several high- and low-velocity zones was derived. At a depth of 96 km, a P-velocity of 8.5 km/s was reached.A minimum shear-wave velocity of 4.70 km/s has been determined for the uppermost part of the mantle underneath the Mohorovičić discontinuity. This velocity allows a shear low-velocity zone of a few tens of kilometers in the uppermost post of the mantle. |
