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  1. No Access

    Article

    (Fe–Ca–Al)-Phosphate Mineralization Enriched with Rare Earth Elements in Sediments of the Middle Jurassic Paleovalley (Shankinka Ore Occurrence, Moscow Region, Central Part of the Russian Plate)

    A new occurrence of phosphate mineralization (Shankinka) has been explored in the Fedkovskaya River mouth, Ruza district, Moscow region. The most common mineral phases are delvauxite, mitridatite, fluorapatite...

    I. A. Novikov, A. A. Razumovskiy, Yu. V. Yashunskiy… in Lithology and Mineral Resources (2024)

  2. No Access

    Article

    Neoproterozoic and Cambrian Protolith of the Metamagmatic Rocks of the Maksyutovo Metamorphic Complex in the Southern Urals: Results of U–Th–Pb (SIMS) Dating of Accessory Zircon

    The U–Pb age of accessory zircon of the magmatic protolith for various metamorphic rocks of the UHP Maksyutovo complex is determined by the U–Th–Pb SIMS (SHRIMP II) method. The protolith age is most confidentl...

    A. V. Ryazantsev, B. G. Golionko, A. V. Skoblenko… in Doklady Earth Sciences (2024)

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    Article

    Geological Investigations of the Mid-Atlantic Ridge between the Charlie Gibbs and Maxwell Transform Faults during Cruise 53 of the R/V Akademik Nikolaj Strakhov

    The article provides information on geological and geophysical studies of the structure of the Mid-Atlantic Ridge between the Charlie Gibbs and Maxwell transform faults in the North Atlantic during cruise 53 o...

    A. A. Peyve, S. Yu. Sokolov, A. N. Ivanenko, A. A. Razumovskiy, I. S. Patina… in Oceanology (2023)

  4. No Access

    Article

    The Relationship between Magmatic and Tectonic Processes in the Formation of the Oceanic Crust to the South of the Charlie Gibbs Fracture Zone (North Atlantic)

    This article presents new data on the structure and relationship of tectonic and magmatic processes during the formation of the Mid-Atlantic Ridge between the Charlie Gibbs and Maxwell Fracture Zones in the No...

    A. A. Peyve, S. Yu. Sokolov, A. A. Razumovskiy, A. N. Ivanenko… in Geotectonics (2023)

  5. No Access

    Article

    Accretion of the Oceanic Crust in the Mid-Atlantic Ridge (48°–51.5° N) during “Dry” Spreading

    This paper is based on geological and geophysical data obtained during the 53th expedition of the R/V Akademik Nikolaj Strakhov. We analyze the structure of the Mid-Atlantic Ridge segment, 400 km long, in the Nor...

    A. A. Peyve, S. Yu. Sokolov, A. N. Ivanenko, A. A. Razumovskiy… in Doklady Earth Sciences (2022)

  6. No Access

    Article

    The Age of Volcanic Tuffs from the Basu and Zigan Formations of the Vendian (Ediacaran) Asha Group in the Southern Urals: Results of U–Th–Pb (SIMS and La-ICP-MS) Dating of Accessory Zircon

    The isotopic U‒Th‒Pb age (SIMS (SHRIMP II) and La-ICP-MS) was obtained for accessory zircon from ash tuffs of the Basu and Zigan Formations of the Asha Vendian (Ediacaran) Group of the Southern Urals. The comp...

    A. V. Ryazantsev, A. A. Razumovskiy, I. A. Novikov… in Doklady Earth Sciences (2022)

  7. No Access

    Article

    Late Neoprotherozoic Granitoid Magmatism of the Baikal-Muya Fold Belt, Ophiolite and Post-Ophiolite Plagiogranites

    Three different-age series of granitoid veins and dikes of the Baikal–Muya fold belt were studied. Two of them, plagiogranites of the ophiolite complex and the first postophiolitic plagiogranites, are associat...

    A. V. Somsikova, Yu. A. Kostitsyn, A. A. Fedotova… in Geochemistry International (2021)

  8. No Access

    Article

    The Oldest Vendian (Ediacaran) Fossils of Eurasia: U–Pb Isotope Age of the Basa Formation (Asha Group, Southern Urals)

    U–Th–Pb (SHRIMP II) isotopic dating of accessory zircons from Vendian (Ediacaran) ash tuffs of the Basa formation section (Asha Group, Southern Ural) was performed for the first time. The concordant age obtain...

    A. A. Razumovskiy, I. A. Novikov, A. V. Ryazantsev, S. V. Rud’ko… in Doklady Earth Sciences (2020)

  9. No Access

    Article

    Geochemical Features of Cupriferous Sandstones in the Orenburg Area of the Ural Region

    The new geochemical data obtained of cupriferous sandstones of the Orenburg area of the Ural region show that the Permian host stratum could have served as the source of rare-earth elements and other microelem...

    A. V. Volkov, I. A. Novikov, A. A. Razumovskiy, K. Yu. Murashov… in Doklady Earth Sciences (2018)

  10. No Access

    Article

    Kuckaraukia multituberculata: A new Vendian fossil from the basa formation of the Asha Group in the South Urals

    A new macrofossil genus and species from the Late Vendian of the Urals is described. Fossils are found on a bedding plane between the sandstone and mudstone and are represented mainly by casts on the sandstone...

    A. A. Razumovskiy, A. Yu. Ivantsov, I. A. Novikov… in Paleontological Journal (2015)

  11. No Access

    Article

    Late neoproterozoic igneous complexes of the western Baikal-Muya Belt: Formation stages

    The paper presents new geological, geochemical, and isotopic data on igneous rocks from a thoroughly studied area in the western Baikal-Muya Belt, which is a representative segment of the Neoproterozoic framew...

    A. A. Fedotova, A. A. Razumovskiy, E. V. Khain, M. O. Anosova, A. V. Orlova in Geotectonics (2014)