29 Result(s)

Article

Analysis of the Sedimentary and Geochemical Characteristics of Sedimentary Clastic Rock Samples from the Alpha–Mendeleev Rise

The paper presents new data on a comparative analysis of sedimentary rocks from the Mendeleev Rise (Shamshura Seamount), presumably, of the Triassic age with the Aptian sandstones obtained by the underwater sa...

M. I. Tuchkova, S. G. Skolotnev, S. D. Sokolov… in Lithology and Mineral Resources (2024)

Article

Middle Jurassic Rocks on the Ulakhan-Sis Ridge (Sakha Republic): Biostratigraphy, Lithological Features, and Depositional Environments

The age and depositional environments of Middle Jurassic terrigenous rocks crowning the Mesozoic section on the northeastern flank of the Nagondzha terrane within the Ulakhan-Sis Ridge are discussed. Based on ...

V. V. Kostyleva, O. A. Lutikov, M. V. Gertseva… in Lithology and Mineral Resources (2024)

Article

The ⁴⁰Ar–³⁹Ar Age of Folding in the Sedimentary Complexes of Chukotka and Wrangel Island (Northeastern Russia)

The ⁴⁰Ar–³⁹Ar isotope dating of newly formed micas and chlorites from thrust zones made it possible to establish that they were formed in the Tithonian (150 Ma). Sedimentary rocks from the Devonian to Triassic we...

M. I. Tuchkova, Corresponding Member of the RAS S. D. Sokolov… in Doklady Earth Sciences (2024)

Article

Paleotectonic Setting of the Accumulation of Middle Jurassic Deposits in the Northeastern Flange of the Nagondzha Terraine (Ulakhan-Sis Ridge)

The age of the Middle Jurassic deposits of the Ulakhan-Sis Range is corrected to the Bajocian–Middle Bathonian. Three terrigenous units are identified that formed at a single stage of sedimentation in the shel...

V. V. Kostyleva, M. V. Gertseva, O. A. Lutikov, E. V. Vatrushkina… in Doklady Earth Sciences (2022)

Article

Tectonic Position of the South Anyui Suture

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 mar...

S. D. Sokolov, M. I. Tuchkova, G. V. Ledneva, M. V. Luchitskaya… in Geotectonics (2021)

Article

Late Jurassic–Early Cretaceous Sandstones of the Algan Formation: Composition, Origin, and Provenance Areas (Northwest of the Koryak Highland)

Abstract—This article presents the results of the petrographic and mineralogical study of the sandstones of the Algan Formation. Sandstones are represented by ultrafine-, fine-, and medium-grained quartz–feldspar...

M. Yu. Gushchina, A. V. Moiseev, M. I. Tuchkova in Moscow University Geology Bulletin (2021)

Chapter

Tectonic Model and Evolution of the Arctic

A key achievement of compilation of the Tectonic Map of the Arctic is a creation of a modern plate-tectonic model of the Circumpolar Arctic. This model demonstrates that the Arctic structure is determined by i...

O. V. Petrov, S. N. Kashubin, S. P. Shokalsky, S. D. Sokolov… in Tectonics of the Arctic (2021)

Chapter

Correlation of Chukotka, Wrangel Island and the Mendeleev Rise

The paper analyzes Mendeleev Rise sandstones as compared with Triassic sediments of continental Chukotka and Wrangel Island. The study of sedimentological characteristics showed that in the samples, there is ...

M. I. Tuchkova, S. P. Shokalsky, S. D. Sokolov, O. V. Petrov in Tectonics of the Arctic (2021)

Article

Amphibolites of the Metamorphic Basement of Wrangel Island: Age, Nature of the Protolith, and Conditions of Metamorphism

The paper presents newly acquired data on the petrography, geochemistry, and geochronology of metamorphic rocks sampled at the Neoproterozoic basement of Wrangel Island. Geochemical data on the mafic rocks met...

S. D. Sokolov, S. A. Silantyev, A. V. Moiseev, M. I. Tuchkova… in Geochemistry International (2019)

Article

Supraproduction Volcanism of Chukotka Terrane in the Late Jurassic–Early Cretaceous (Arctic Region, Russia)

The age and geodynamic position of the volcanic source of the Upper Jurassic–Lower Cretaceous deposits of Western Chukotka were determined. Products of synchronous volcanism were revealed by detailed lithologi...

E. V. Vatrushkina, M. I. Tuchkova, S. D. Sokolov in Geotectonics (2019)

Article

Stages in the Structural Evolution of the Sedimentary Cover of Wrangel Island, Eastern Arctic

The paper presents data on mesostructural field observations in the northern, central, and eastern parts of Wrangel Island. Numerous stages in the structural evolution of geological complexes of the fold sedim...

A. V. Moiseev, S. D. Sokolov, M. I. Tuchkova, V. E. Verzhbitsky… in Geotectonics (2018)

Article

Sedimentation Conditions and Provenance Composition of the Upper Jurassic–Lower Cretaceous Deposits of the Upper Pegtymel Depression, Chukotka Terrane

The deposits of the Imlekin Formation of the Upper Pegtymel depression were formed in the southern margin of the Chukotka Terrane synchronously with accretion of the Kulpolney island arc to the Chukotka–Arctic...

E. V. Vatrushkina, M. I. Tuchkova in Russian Journal of Pacific Geology (2018)

Article

Deformations and Structural Evolution of Mesozoic Complexes in Western Chukotka

Detailed structural investigations have been carried out in the Pevek district to specify tectonic evolution of the Chukotka mesozoids. The earliest south-verging folds F1 formed in Triassic rocks at the first...

B. G. Golionko, E. V. Vatrushkina, V. E. Verzhbitskii, S. D. Sokolov… in Geotectonics (2018)

Article

Marginal continental and within-plate neoproterozoic granites and rhyolites of Wrangel Island, Arctic region

The paper presents new data on the U–Pb zircon age, as well as results of isotopic geochemical analysis, of granites and rhyolites from Wrangel Island. The U–Pb age estimates of granites and rhyolites are grou...

M. V. Luchitskaya, A. V. Moiseev, S. D. Sokolov, M. I. Tuchkova… in Geotectonics (2017)

Article

Tectonic zoning of Wrangel Island, Arctic region

The Northern, Central, and Southern zones are distinguished by stratigraphic, lithologic, and structural features. The Northern Zone is characterized by Upper Silurian–Lower Devonian sedimentary rocks, which a...

S. D. Sokolov, M. I. Tuchkova, A. V. Moiseev, V. E. Verzhbitskii… in Geotectonics (2017)

Article

Neoproterozoic granitoids on Wrangel Island

Based on geochronological U–Pb studies, the age of Wrangel Island granitoids was estimated as Neoproterozoic (Cryogenian). Some granitoids contain zircons with inherited cores with an estimated age of 1010, 11...

M. V. Luchitskaya, S. A. Sergeev, S. D. Sokolov, M. I. Tuchkova in Doklady Earth Sciences (2016)

Article

Present-day structure and stages of tectonic evolution of Wrangel Island, Russian eastern Arctic Region

Present-day structure of Wrangel Island was formed during two main stages of Mesozoic-Cenozoic deformation. The general fold-thrust structural grain of the island, characterized by northern vergence and compli...

V. E. Verzhbitsky, S. D. Sokolov, M. I. Tuchkova in Geotectonics (2015)

Article

Tectonics of the South Anyui Suture, Northeastern Asia

The South Anyui Suture separates the structures of the Chukotka and Verkhoyansk-Kolyma Fold Areas. The suture consists of ophiolites, island-arc rocks, deformed Upper Triassic and Upper Jurassic-Lower Cretaceo...

S. D. Sokolov, M. I. Tuchkova, A. V. Ganelin, G. E. Bondarenko, P. Layer in Geotectonics (2015)

Article

New data on the structure and tectonic evolution of Wrangel Island (Russian East Arctic)

V. E. Verzhbitskii, S. D. Sokolov, M. I. Tuchkova… in Doklady Earth Sciences (2014)