The present-day southwestern margin of the Siberian Craton is represented by its Early Precambrian inliers (Angara‐Kan and Sayan) and Mesoproterozoic‐ Neoproterozoic marginal continental region that includes the Yenisei Range and Sayan areas (Fig. 1). The Early Precambrian evolution of structures of the Siberian Craton culminated with formation of the Early Proterozoic Angara continental-margin foldbelt, intense intrusion of granitoids (1.87‐1.84 Ga ago), and its general consolidation [1]. Mesoproterozoic‐Neoproterozoic fold‐thrust complexes in the trans-Angara part of the Yenisei Range and largely riftogenic complexes of the Sayan region demonstrate all features typical of the ensialic marginal continental and intracontinenal structures. Precambrian blocks and terranes in folded structures of the Central Asian foldbelt were united into the Sayan‐Yenisei accretionary belt. The belt includes Early and Late Proterozoic island-arc and oceanic terranes (Central, Idar, and Shumikha‐Kirel terranes in the Kan block; Arzybei, Isakovka, and Predivinsk) or terranes with substantially metasedimentary sections (Derba) and fragments of oceanic and island-arc structures (Kuvai Group) overlain by Vendian‐Cambrian strata in the Man Trough. The age of accretionary‐collision processes, which promoted amalgamation of Precambrian terranes and their amalgamation with the Siberian Craton margin, remains an open problem. Nearly synchronous metamorphism and granite intrusions in two or more terranes, as well as formation of synchronous molasses in foreland basins, serve as indicators of the accretionary‐ collision processes. The purpose of this work is to determine, based on the above-mentioned criteria, the age of the main event that produced the Sayan‐Yenisei accretionary belt and terminated the Neoproterozoic history of the Siberian Craton. We carried out complex Ar‐Ar dating of amphiboles and biotites from metamorphic rocks in Precambrian terranes and from the marginal zone of the Siberian Craton, U‐Pb dating of zircons from collision-related granitoids, and sedimentological studies in Vendian foredeeps. Given below is a brief characteristic of Precambrian terranes, which were the main objects of study. Three terranes (Central, Idar, and Shumikha‐Kirel) are recognized in the structure of the Kan block (Fig. 1). They differ from each other in lithology and age of the constituting rock associations and are characterized by tectonic boundaries [2]. The Central Terrane is represented by the Paleoproterozoic lithotectonic complex and constitutes an old “core” of the block under consideration. The lower part of the section is largely composed of metavolcanics of the tholeiitic‐basaltic and calc-alkaline associations, while metasediments prevail in its upper part. Orthogneisses (metadacites) aged 2.3 Ga are characterized by positive e Nd (from 1.8 to 3.0) and T (DM) = 2.4‐ 2.5 Ga values. Similar values of the model age (2.3‐ 2.6 Ga) are established also for graywackes. Based on characteristic geochemical parameters, the metamorphosed volcanogenic‐terrigenous complex is comparable with igneous associations and graywackes formed in subduction settings. The stratified complex is intruded by Late Vendian (555 ± 5 Ma) trondhjemites of the Verkhnii Kan Massif [2]. The Idar Terrane is separated from the Central Terrane by the thrust zone. The lower part of the stratified complex is composed of metamorphosed rocks of the komatiitic‐tholeiitic series, which are comparable with oceanic volcanics in geochemical properties. They enclose intrusive ultramafic and ultramafic‐mafic massifs crosscut by plagiogranite veins. The section is supplemented in the southeastern direction with a sequence of garnet-bearing biotite and amphibole paragneisses (metagraywackes), which are similar (in the composition of trace elements) to terrigenous sediments of island arcs. Paragneisses are characterized by a wide range of model Nd age varying from 1.3 to 2.5 Ma.