Search Results - "Letnikova, E. F."

Fragment of an Early Cambrian Continental Margin in the Structure of the Tuva Segment of the Central Asian Orogenic Belt (Teregtig Formation): Results of U–Pb Zircon Dating and Sr Chemostratigraphy by Ivanov, A. V., Letnikova, E. F., Shkolnik, S. I., Maslov, A. V., Vetrova, N. I.

“…The age of sedimentation (530–520 Ma) of the Teregtig Formation of South Tuva is estimated on the basis of U–Pb dating of detrital zircon grains from…”
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The Butugol Block: A Precambrian Exotic Block in the Basement of the Tuva–Mongolian Microcontinent (Eastern Sayan) by Shkolnik, S. I., Belyaev, V. A., Letnikova, E. F., Demonterova, E. I., Bryansky, N. V., Kolesov, K. K., Ivanov, A. V.

“…The isotope–geochronological and geochemical data on the age and composition of rocks of the Butugol Block, located in the eastern part of the Tuva–Mongolian…”
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Sr-Isotopic Composition of Paleoocean Water 960 Ma Ago (according to the Data for the Nizhny Tunguska Formation of the Turukhansk Uplift, Siberian Platform) by Letnikova, E. F., Zhdanov, A. A., Ivanov, A. V., Maslov, A. V., Izokh, A. E., Letnikova, A. F., Soloshenko, N. G.

“…The Sr-isotopic composition in carbonate rocks aged 980–920 Ma has been defined in only one place in the world, the Huainan Formation of the North China…”
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Genetic Type and Age of Ferromanganese Sediments of the Taloi Deposit, Transbaikalia by Shkolnik, S. I., Reznitskii, L. Z., Letnikova, E. F., Khubanov, V. B.

“…The paper reports petrochemical and isotope data on the ferromanganese ores and host volcanosedimentary rocks of the Taloi–Usoi interfluve of the Ikat terrane,…”
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Stages of Tectono-Magmatic Activity in the Border Zone of the Siberian Platform and the Tannuola–Khamsara Segment of the CAFB (According to the Results of U–Pb Isotope Studies) by Shkolnik, S. I., Letnikova, E. F., Reznitskii, L. Z., Ivanov, A. V., Proshenkin, A. I.

“…Based on the dating of metamorphic and igneous rocks of the northeastern part of the Khamsara terrane, the main stages of tectono-magmatic activity at the…”
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Age of Ore-Bearing Rocks at Devonian Fe–Mn Deposits, Central Kazakhstan by Shkolnik, S. I., Letnikova, E. F., Brusnitsyn, A. I., Lepekhina, E. N., Ivanov, A. V., Perova, E. N.

“…Isotope study of ore-bearing rocks at Fe–Mn rift deposits of the Atasu and Zhezdy (Dzhezdy) ore districts in Central Kazakhstan has been carried out for the…”
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High-Potassium Volcanism Approximately 640 Ma in the Southwestern Siberian Platform (Biryusa Uplift, Sayan Region) by Letnikova, E. F., Izokh, A. E., Kosticin, Y. A., Letnikov, F. A., Ershova, V. B., Federyagina, E. N., Ivanov, A. V., Nojkin, A. D., Shkolnik, S. I., Brodnikova, E. A.

“…On the basis of petrographic and mineralogical studies, we have established the presence of clastic rocks with a strong predominance of K-feldspar among the…”
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First Results of Dating Detrital Zircons from Late Precambrian Coarse Clastic Sequences of Ulutau Massif, Central Kazakhstan by Kanygina, N. A., Letnikova, E. F., Degtyarev, K. E., Tretyakov, A. A., Zhimulev, F. I., Proshenkin, A. I.

“…U–Pb geochronological studies of detrital zircons from the Late Precambrian coarse sequence of the Ulutau massif are studied. The concordant ages of detrital…”
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High-K Rocks of the Late Riphean Mara Paleovolcano, Biryusa Uplift, South of the Siberian Platform by Izokh, A. E., Letnikova, E. F., Izbrodin, I. A., Ivanov, A. V., Shkolnik, S. I., Doroshkevich, A. G.

“…— The studies are focused in the Mara–Kamenka–Uvat interfluve of the Biryusa Uplift of the basement of the Siberian Platform, where the Mara paleovolcano was…”
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AN ACTIVE NEOPROTEROZOIC CONTINENTAL MARGIN OF THE ZAVKHAN MICROCONTINENT (MONGOLIA): ISOTOPIC-GEOCHRONOLOGICAL EVIDENCE by Shkolnik, S. I., Letnikova, E. F., Reznitsky, L. Z.

“…There have been presented the results of the study of a thick (no less than 2–3 km), extended (for more than 200 km) volcanogenic formation (Tsetsen-Uul or…”
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Application of the background standard method for the determination of Rb, Sr, Y, Zr, and Nb contents in phosphorites by x-ray fluorescence by Cherkashina, T. Yu, Khudonogova, E. V., Revenko, A. G., Letnikova, E. F.

“…The aim of the present work is to demonstrate the application of the x‐ray fluorescence (XRF) technique to the determination of Rb, Sr, Y, Zr, and Nb contents…”
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Erratum to: Sr-Isotopic Composition of Paleoocean Water 960 Ma Ago (according to the Data for the Nizhny Tunguska Formation of the Turukhansk Uplift, Siberian Platform) by Letnikova, E. F., Zhdanov, A. A., Ivanov, A. V., Maslov, A. V., Izokh, A. E., Letnikova, A. F., Soloshenko, N. G.

“…An Erratum to this paper has been published: https://doi.org/10.1134/S1028334X23060144…”
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The Provenance of the Vendian Highly Aluminiferous Rocks of the Tunka Bald Mountains, Eastern Sayan: Isotopic, Geochemical, and Mineralogical Evidence by Shkolnik, S. I., Ivanov, A. V., Letnikova, E. F., Anosova, M. O.

“…— Data on the mineral, chemical, and Nd isotope composition of the highly aluminiferous schists of the Gorlyk Formation in the Tunka Bald Mountains of the…”
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AGE OF THE KINTEREP FORMATION OF THE NORTHWESTERN SALAIR: CHEMOSTRATIGRAPHY AND U-Pb ZIRCON DATING by Vetrova, N. I., Vetrov, E. V., Letnikova, E. F., Soloshenko, N. G.

“…A comprehensive study of the stratotype section of the Kinterep formation of the North-Western Salair was carried out, including geochemical and isotope (Sr,…”
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Geochemistry of Rare and Rare-Earth Elements in Manganiferous Sediments of the Polar Urals and Pai-Khoi by Brusnitsyn, A. I., Zhukov, I. G., Letnikova, E. F.

“…Data on the concentration of rare and rare-earth elements in the Devonian manganese-rich metasediments of the Polar Urals and Pai-Khoi Ridge are presented. It…”
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New Isotope Constraints on the Time of Formation of the Nersa Dolerite Complex from the Biryusa–Sayan Area by Vasyukova, E. A., Metelkin, D. V., Letnikov, F. A., Letnikova, E. F.

“…New data on the Sm–Nd isotopic composition of the dolerites of the Nersa complex that are consistent with the petrographic study and the U–Pb dating of…”
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Late Precambrian Metamorphic Complexes of the Ulutau Massif (Central Kazakhstan): Age, Composition, and Formation Settings of Protoliths by Tretyakov, A. A., Degtyarev, K. E., Kanygina, N. A., Letnikova, E. F., Zhimulev, F. I., Kovach, V. P., Danukalov, N. K., Lee, H.-Y.

“…— This work presents the results of a study of metamorphic rocks of the Bekturgan and Balazhezdy groups of the Precambrian Ulutau massif (Central Kazakhstan),…”
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New Data on the Age of Detrital Zircons from the Kokdjot Group and Bolshekaroi Formation, Malyi Karatau (Southern Kazakhstan) by Khudoley, A. K., Alexeiev, D. V., DuFrane, S. A., Degtyarev, K. E., Letnikova, E. F.

“…U–Pb dating of detrital zircon from the Kokdjot Group and Bolshekaroi Formation (Malyi Karatau) yielded for all the samples age clusters at about 800–805,…”
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A Vendian manganese-bearing basin of the Ikat terrane: Formation settings and provenance areas by Shkolnik, S. I., Letnikova, E. F., Maslov, A. V., Buyantuev, M. D., Reznitskii, L. Z., Barash, I. G.

“…The results of geochemical, mineralogical, and isotope (U–Pb and Sm–Nd) studies of metasedimentary manganese-bearing rocks from the Itantsa Formation of the…”
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Main stages of tectonomagmatic activity of the Tuva–Mongolian microcontinent in the Precambrian: data on the U–Pb age of zircons by Letnikova, E. F., Shkolnik, S. I., Letnikov, F. A., Karakovskii, E. A., Kostitsyn, Yu. A., Vishnevskaya, I. A., Reznitskii, L. Z., Ivanov, A. V., Prochenkin, A. I.

“…The U–Pb age of zircons from Ediacaran sandstones of the cover of the Tuva–Mongolian microcontinent and the rocks of its Early Precambrian basement (Gargan…”
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