Abstract
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 Mohorovicic 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 Mohorovicic discontinuity. This velocity allows a shear low-velocity zone of a few tens of kilometers in the uppermost post of the mantle.
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