Seismic method in studying the deep structure of the Baltic Shield
Abstract
Until recently, seismic exploration has been little used in the study of crystalline structures of ancient shields. In Karelia in 1958-1959, during the International Geophysical Year, the first regional studies of the ancient shield in the USSR were carried out by the method of deep seismic sounding. In 1960-1961 seismic work in combination with other methods was continued in the north-west of the Kola Peninsula in connection with the study of the deep structure of the Pechenga effusive‑sedimentary series. On the basis of these works, performed by the Western Geophysical Trust, VSEGEI, Leningrad Mining Institute and the organization “Spetsgeofizika”, a number of fundamental issues of the application of seismic exploration in the complex conditions of the Baltic Shield were clarified and interesting geological results were obtained.
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