Cenozoic deposits of western Kotel’nyi Island (New Siberian Islands): key insights into the tectonic evolution of the Laptev Sea ...

• Main Authors: Ershova, Victoria, Drachev, Sergey, Prokopiev, Andrei, Khudoley, Andrei, Vasiliev, Dmitry, Aleksandrova, Galina
• Format: Dataset
• Language: unknown
• Published: Taylor & Francis 2022
• Subjects: Evolutionary Biology; FOS Biological sciences; 59999 Environmental Sciences not elsewhere classified; FOS Earth and related environmental sciences; 39999 Chemical Sciences not elsewhere classified; FOS Chemical sciences; Ecology; 69999 Biological Sciences not elsewhere classified; Inorganic Chemistry; Arctic; Laptev Sea; New Siberian Islands; laptev
• Online Access: https://dx.doi.org/10.6084/m9.figshare.20431288; https://tandf.figshare.com/articles/dataset/Cenozoic_deposits_of_western_Kotel_nyi_Island_New_Siberian_Islands_key_insights_into_the_tectonic_evolution_of_the_Laptev_Sea/20431288

The Arctic sedimentary basins are still poorly studied in comparison with other regions. The lack of deep wells across the eastern Russian Arctic has resulted in numerous contrasting geodynamic models for the geological evolution and age of sedimentary successions within this frontier region, where a modern mid-ocean ridge breaks through the continental crust in the Laptev Sea. The only onshore evidence of rifting processes is a number of small graben-like depressions exposed on the New Siberian Islands and along the Laptev Sea coast. We present U-Pb detrital zircon provenance and palynology study results of the Cenozoic sedimentary rocks filling graben-like depressions across western Kotel’nyi Island. Palynological data indicate that these sedimentary rocks are Early Eocene to Pleistocene in age. Based on U-Pb detrital zircon dating, Early Eocene and Late Oligocene clastic sediments were sourced from underlying deformed Palaeozoic rocks as well as by reworking of Upper Mesozoic rocks outcropping elsewhere ...