Variability in distribution of major and trace elements in Lower Eocene siliceous sections of the Transuralian Region, Russia

Clay Minerals and Detrital Material in Paleocene–Eocene Biogenic Siliceous Rocks (Sw Western Siberia): Implications for Volcanic and Depositional Environment Record

“…The calculated lithochemical modules [26] indicate that the biogenic silica accumulation proceeded with a relatively high role played by chemical weathering on the adjacent land, which provided an additional transfer of the siliceous substance in the form of true or colloidal solutions to the sedimentation basin [26]. This proves that the relief of the land surrounding the Paleocene sea basin appears to have been comparatively unified and did not provide a significant amount of detrital material.…”

“…In sections of the Transuralian region, including some that were studied by the authors, markers facilitating the diagnosis of intervals associated with the PETM have not yet been encountered. Moreover, as recent geochemical studies have shown [26], these sections are geochemically weakly contrasting and characterized by a high degree of homogeneity. The Paleocene-Eocene sections in the western and north-western parts of Western Siberia are highly siliceous, which results in a deficit of carbonate phases observed in the sediments, and a substantial portion of international research is based on their study.…”