Folded basement structure of East European platform, from geophysical data

Abstract

Conclusions drawn from a comprehensive analysis and correlation of regional, geophysical (magnetic, mainly), geologic, geochronologic and drilling data for the East European platform are presented, with a regional geologic map. The region is equidimensional, extending from Scandinavia to the Urals, with Moscow in the geographical center. Precambrian folding in the East European basement is as tectonically heterogeneous as the Baltic and Ukrainian shields. Basement structure involves folding connected with the following orogenic phases: Archean, Karelian, Gothian, Jotnian, Baykalian, Caledonian, Hercynian and Alpine. Magnetic fields tend to reflect Archean gneiss massifs and linear folded zones and are relatively uninfluenced by a veneer of effusive and sedimentary rocks. Basement faults produce angular outlines clearly expressed in the regional geophysical fields. L.T. Grose