Ordovician of the Siberian Platform

Carbon isotope chemostratigraphy and conodonts of the Middle–Upper Ordovician succession in the Tungus Basin, Siberian Craton

“…6). This correlation proposes a slightly different position for the base of the Upper Ordovician in Siberia compared to the traditional scheme (Bergström et al, 2009;Kanygin et al, 2010a). As the base of the Haljala Stage in Baltoscandia lies clearly higher in the succession than the base of the Sandbian Stage (Webby et al, 2004;Männik and Viira, 2012), we may consider that the base of Chertovskian Stage in Siberia is evidently younger than the base of the Sandbian (Fig.…”

“…Precise correlation of the boundaries of Siberian regional stages and global stages is difficult, due to the endemic character of the Siberian faunas, particularly of those in the shallow-water facies (Kanygin et al, 2010a). The base of the Sandbian has been tentatively correlated with the base of the Chertovskian Stage and the base of the Katian is thought to lie in the middle part of the Baksian Stage (Kanygin et al, 2010a(Kanygin et al, , 2010bFig.…”

“…Based on the earlier biostratigraphic studies the Volginian-Dolborian interval has been correlated with the upper Darriwilian-lower Katian interval on global scale (Bergström et al, 2009;Kanygin et al, 2010aKanygin et al, , 2010b. Precise correlation of the boundaries of Siberian regional stages and global stages is difficult, due to the endemic character of the Siberian faunas, particularly of those in the shallow-water facies (Kanygin et al, 2010a).…”

“…Based on lithological criteria the extensive Tungus Basin has been subdivided into several structural-facies zones. The sections studied by us represent the Igarka-Noril'sk Zone (Kulyumbe area) and SouthTunguska Zone (Podkamennaya Tunguska area), both located on the western margin of the Tungus Basin (Kanygin et al, 2006(Kanygin et al, , 2010a. Recent sequence stratigraphic studies by Dronov et al (2009) and Kanygin et al (2010b) resulted in recognition of nine depositional sequences in the Ordovician succession of Siberian Craton.…”

“…The central part of the continent was occupied by an extensive intracratonic Tungus Basin ( Fig. 1; Kanygin et al, 2010aKanygin et al, , 2010b. Sedimentation of warm-water tropical carbonates during the Early Ordovician was replaced by deposition of cool-or temperate-water carbonates during the Darriwilian, although the palaeocontinent was still located in low latitudes (Dronov, 2013).…”