Tectonic Evolution of the Earth’s Crust in Siberia

The history of the Earth’s crust evolution in Siberia has been considered on the basis of the “Atlas of Tectonic Maps and Reference Profiles of Siberia” (1988). The most part of the continental crust was shown to be Preriphean (probably Archean). By the end of the Early Proterozoic (Akitkanian), the large North-Asian craton had been formed, resulting from the collision of numerous sialic blocks. In the Riphean-Paleozoic, tectonic activity within the craton was expressed in fracturing, relative displacements of the blocks, and reworking of marginal areas by deutero-orogeny. The edges of the foldbelts framing the Siberian Platform are considered to be secondary in relation to the North-Asian craton, resulting from its fractionation.