Investigations of the earth's crust in Czechoslovakia using industrial blasting

Summary

Results obtained in studying the M-discontinuity by means of deep seismic sounding in Czechoslovakia are presented. Apart from profile measurements, surface surveys are being carried out in Czechoslovakia using industrial blasting, where the measured sections are at epicentral distances of 80 to 120 km. The international profiles and points, at which data from surface measurements were obtained, are given in Fig. 1. The suitability of using the method (Fig. 3, 4) is discussed, and a structural map of the M-discontinuity for Czechoslovakia has been constructed from the results obtained (Fig. 5). The M-discontinuity in Czechoslovakia is connected with its layout in the neighbouring countries and the map of the M-discontinuity has been established for Central Europe (Fig. 6). It was found that the zones of larger crust thicknesses in the Alps and Carpathians are very important for treating the contact between the European Platform and the foundations of the Alpine System.