Published in Geotectonics
AbstractThree main stages of granitoid magmatism and continental crust formation of Eastern Arctic are distinguished: Neoproterozoic (750–550 Ma), Devonian–Early Carboniferous (390–350 Ma), and Early Cretaceous (117–105 Ma). The correlation of Neoproterozoic granitoid magmatism of the New Siberian Islands, Wrangel Island, the Chukchi Peninsula, Chu...
Published in Geotectonics
AbstractInterpretational analysis of new seismic data allowed us to reconstruct the geodynamic settings that led to the formation of an ensemble of tectonic structural elements in the conjugation zone of the Eurasian Basin, Lomonosov Ridge, and Eurasian continental margin (Laptev and East Siberian seas). The presence of the Khatanga–Lomonosov fract...
Published in Geotectonics
Abstract—The West Pekulnei marginal continental arc terrane adjoins the East Pekulnei oceanic crust terrane, the siliceous–volcanic strata of which (Pekulneiveem Formation, PV) are subdivided into two complexes. The first PV-1 complex comprises a dike series; pillow basalts with elevated Nb and TiO2 contents and FeO*/MgO ratios; and siliceous–argil...
Published in Geotectonics
Abstract—The South Anyui Fold System was formed at the end of the Early Cretaceous at the site of a closed oceanic basin as a result of the collision of the Chukotka microcontinent with the structures of the active margin of the Siberian continent. There are two distinct stages in the tectonic history of the oceanic basin. At the first stage (Late ...
Published in Geotectonics
AbstractFor the first time tectonic reconstructions was carried out along the entire seismic dataset, including both Russian and international seismic lines. Based on the analysis of the sedimentary cover of the Eurasian Basin (Arctic Ocean), four stages of evolution of the sedimentation system were identified. During the first, Cretaceous–Paleocen...
Published in Geotectonics
AbstractThe article overviews the existing data and ideas about the structure of the Atlantic–Arctic rift system, the youngest segment of which is the Western Arctic. The main properties of this system are the direction of its progradation towards the North Pole, the submeridional orientation of the rifts, their separation by latitudinal faults, an...
Published in Geotectonics
AbstractSynthesis of the results of U–Pb dating of detrital zircons (dZr) from the Uppermost Precambrian–Phanerozoic strata of the southern and southeastern framing of the East European Platform (EEP), the Uppermost Precambrian and Cambrian–Ordovician strata of the Southern Urals, Ordovician strata of the Cis-Caspian Sea region and Jurassic coarse ...
Published in Geotectonics
AbstractWe present the results of studying the deep velocity structure of the crust and upper mantle beneath Southeast Asia based on data from a representative dataset of Rayleigh wave group velocity dispersion curves (about 6500 seismic paths) in the period range of 10–250 s. Group velocity distributions in separate periods and estimates of their ...
Published in Geotectonics
Abstract—In our study we characterize the thermodynamic regimes in the thrust zone of the newly formed Paleoproterozoic continental crust of the Svecofennian mobile belt on the outskirts of the Archean Karelian continent along the sublatitudinal, in modern coordinates, powerful strike-slip zone of the Northern Ladoga area. The Meyeri thrust zone is...
Published in Geotectonics
AbstractThe article considers the features of the tectonics of the Central Russian deformation belt located in the central part of the East European Platform. The belt is traced in a wide (up to 350 km) strip ENE for more than 1000 km. In studying this structure, remote and structural analysis methods were used. Based on the available data, analysi...
