Georg. Askoldovich Petrov

Institute of Geology and Geochemistry, Uralian Geological Survey Expedition · Urals

An Erratum to this paper has been published: https://doi.org/10.1134/S1028334X23070218

Research subject. Hypabyssal intrusive bodies of a gabbro-dolerite-monzonite-granodiorite composition, common among the Devonian island-arc sequences of the East Tagil structural-formational zone in the Northern Urals. These bodies are dated as the Late Devonian-Early Carboniferous and attributed to the post-accretionary continuously differentiated...

Subject research. Hypabyssal intrusive gabbro-dolerite-monzonite-granodiorite complex from the northern part of the Tagil megazone. Material and methods . Intrusive rocks situated among the Devonian strata of the East Tagil structural-formation zone at the North Urals were studied. Petrographic studies, silicate (XRF) analyses and determination of...

Abstract—Within the northern part of the Tagil paleo-island-arc structure in the Northern Urals, the Sosva– Lozva graben is identified. The graben is filled mainly with Devonian and Lower Carboniferous terrigenous and volcanic strata. The location of the graben to the west (in modern coordinates) of the supra-subduction igneous complexes and the co...

Within the northern part of the Tagil paleo-island-arc structure in the Northern Urals, the Sosva-Lozva graben is identified. The graben is filled mainly with terrigenous and volcanic strata of the Devonian and Lower Carboniferous. The location of the graben to the west (in modern coordinates) of the supra-subduction magmatic complexes and the comp...

2022) Геохимические особенности вулканитов северной части Тагильской структуры как отражение эволюции палеозоны субдукции. Лито сфера, 22(6), 709-740. https://doi.org/10.24930/1681-9004-2022-22-6-709-740 For citation: Petrov G.A. (2022) Geochemical features of volcanites of the northern part of the Tagil structure as a reflection of the evolution o...

The book is devoted to the characterization of Neoproterozoic magmatic and metamorphic complexes, lying among Paleozoic island-arc series in the Middle Urals. Geochemical data indicate the formation of Precambrian complexes as a result of subduction, plume and accretion processes, without significant participation of the continental crust. The book...

The study of the geochemical features and isotopic (Sm-Nd and U-Pb) age of the Ivdel dolerite complex distributed on the eastern slope of the Northern Urals within the Tagil island-arc megazone was performed. It was found that the magmatic rocks composing it are of Famenian age and, consequently, were formed after the closure of the subduction zone...

The Ural mobile belt is an intracontinental epioceanic orogen that has already gone through all stages of the geodynamic development. Igneous rocks formed during each stage are important indicators for understanding the evolution of this belt and determining potential ore contents of its segments. We consolidated large datasets on petrogeochemistry...

The study of the geochemical features and isotopic (Sm-Nd and U-Pb) age of the Ivdel dolerite complex distributed on the eastern slope of the Northern Urals within the Tagil island-arc megazone was performed. It was found that the magmatic rocks composing it are of Famenian age and, consequently, were formed after the closure of the subduction zone...

Petrov G.A. Precambrian complexes of the Isherim anticlinorium (North Urals): stratigraphy, magmatism, metamorphism, metallogeny. Yekaterinburg: Uralian branch of Russian Academy of Science, 2020. 176 p. The book is devoted to the characteristics of Precambrian complexes of the Isherim (Vishera-Kutim) anticlinorium, located in the axial part of the...

For the first time, the time of completion of the formation of calc-alkaline volcanic complexes of the Devonian Island Arc (Franian) in the Northern Urals was determined. It is shown that the late Devonian volcanic rocks of the Limka series have geochemical characteristics that bring them closer to the rocks of developed island arcs and active cont...

The date of cessation of calc-alkaline volcanic complex accumulation within the Devonian (Fras-nian) island arc in the Northern Urals was determined for the first time. It was demonstrated that the geo-chemical characteristics of the Late Devonian volcanic rocks of the Limka Formation are similar to those of the rocks of mature island arcs and acti...

ON THE GENESIS OF DEPOSITS OF THE PERVY SEVERNY IRON ORE DISTRICT Petrov G.A. Joint stock company “Uralian geological survey expedition”620014, Yekaterinburg, Vainera-street, 55; Institute of geology and geochemistry of Uralian branch or RAS , 620016, Yekaterinburg,, the academic Vonsovsky street, 15. Abstract The Pervy Severny iron ore district i...

В северной части Кваркушско-Каменногорского блока выделяется фрагмент аккреционно-субдукционного комплекса (САК) тиманид. Отличительными особенностями фрагмента САК являются: интенсивная тектоническая дислоцированность толщ, проявление глаукофансланцевого метаморфизма, присутствие метаморфизованных бонинитов, высокая степень насыщенности разрезов г...

Впервые определено время завершения формирования известково-щелочных вулканических комплексов девонской островной дуги (фран) на Северном Урале. Показано, что позднедевонские вулканиты лимкинской свиты имеют геохимические характеристики, сближающие их с породами зрелых островных дуг и активных континентальных окраин. Некоторое "запаздывание" финаль...

Cambrian igneous formations in the Northern Urals were identified and described for the first time. It was established that the Timanide orogeny terminated in the Early Cambrian and was followed by continental rifting above a mantle plume in the Late Cambrian.

КЕМБРИЙСКИЙ МАГМАТИЗМ НА СЕВЕРНОМ УРАЛЕ: НОВЫЕ ДАННЫЕ О ВОЗРАСТЕ И УСЛОВИЯХ ФОРМИРОВАНИЯ Г.А.Петров, Ю.Л.Ронкин, А.Гердес (A.Gerdes), А.В.Маслов Реферат Впервые на Северном Урале среди допалеозойских комплексов в южной части Ляпинско-Кутимского антиклинория выявлены и охарактеризованы кембрийские магматические образования – гранитоиды, слагающ...

Abstract Granitoids of Vels anticlinorium - one of the major Precambrian structures of the North Urals, are poorly studied by modern geochemical and isotope-geochronological methods that led to the existence of different points of view on formation conditions and age of these rocks. The authors performed a study of the composition of rocks from thr...

It is shown that the Riphean sediments of the Bashkir and Isherim anticlinoria of the Ural mobile belt were formed in different settings. Sediments of the Bashkir Anticlinorium are autochthonous and were formed in the eastern (in present-day coordinates) Baltica from proximal siliciclastics, whereas the complexes of the Isherim Anticlinorium did no...

The U-Pb isotope data and corresponding ages of detrital zircons from rocks of the basal complexes of the Uralides of different segments of the Ural Fold Belt are considered. It was established that complexes of ancient domains of the East European Platform (Volga-Uralia, Sarmatia, Kola, etc.) seem to have been the main provenance areas of the clas...

Abstract⎯The U–Pb isotope data and corresponding ages of detrital zircons from rocks of the basal complexes of the Uralides of different segments of the Ural Fold Belt are considered. It was established that complexes of ancient domains of the East European Platform (Volga-Uralia, Sarmatia, Kola, etc.) seem to have been the main provenance areas of...

Granitoid massifs of the northern part of the West Tagil structural-formational zone previously had not a reliable geochronological substantiation of age however, some of them are connected with skarn-magnetite deposits. One of such ones is the Yuzhno-Pomursky massif, to which the dedicated copper-iron ore deposit - Tretii Severnyi Rudnik. Authors...

New data on composition and age of Precambrian granites and volcanic rocks in the southern part of the Lyapin structure (Northern Urals) are considered. The geochemical features of the igneous rocks are similar to those of the rocks formed in both divergent and convergent environments. In the Late Precambrian (583–553 Ma), the investigated area is...

The first data on the Late Riphean age by U–Pb and Sm–Nd analysis (≥922 ± 14 and 686 ± 19 Ma, respectively) were obtained for rocks of the dunite–clinopyroxenite–gabbro complex of the Chistop massif in the Patinum-bearing Belt of the Urals. These data allow one to assume that the formation of the Ural paleoocean probably started immediately after t...

The features of the Sc, Cr, Co, Ni, Th and rare earth elements distribution in the black shales of the Riphean Murav’inskaya and Velsovskaya formations in southern part of the Lyapin-Kutim anticlinorium (Northern Ural) are analyzed. The contents of the listed elements in 20 samples of black shales are determined by the ICP-MS method at the IGG UB R...

At the poorly studied area of Northern Urals the Early-Paleozoic volcanic complexes were allocated, dated and characterized. Volcanic rocks in researching area were formed during period from Late Ordovician to Early Devonian and were attributed to Palnikshor (Vyja), Shemur, Pavda, Imennya and Sos’va (Tura) formations. The greatest attention was pai...

Проанализировано распределение широкого спектра редких и рассеянных элемен-тов в низкоуглеродистых глинистых сланцах ряда литостратиграфических подраз-делений рифея, венда и нижнего палеозоя Южного, Среднего и южной части Се-верного Урала (саткинская, большеинзерская, суранская, юшинская, зигазино-комаровская, вёлсовская, бутонская, безгодовская и...

At the poorly studied area of Northern Urals the Early-Paleozoic volcanic complexes were allocated, dated and characterized. Volcanic rocks in researching area were formed during period from Late Ordovician to Early Devonian and were attributed to Palnikshor (Vyja), Shemur, Pavda, Imennya and Sos’va (Tura) formations. The greatest attention was pai...

The Tagil structure representing a large fragment of the Paleozoic island arc on the eastern slope of the Urals has been sufficiently well studied in its southern part (Middle Urals). In contrast, reliable data on the age and geochemical properties of various, including granitoid, rock complexes available for its northern part are scarce. The first...

The Tagil structure representing a large fragment of the Paleozoic island arc on the eastern slope of the Urals has been sufficiently well studied in its southern part (Middle Urals). In contrast, reliable data on the age and geochemical properties of various, including granitoid, rock complexes available for its northern part are scarce. The first...

Тагильская структура – крупный фрагмент палеозойской островодужной системы, расположенный на восточном склоне Урала, достаточно хорошо изучена в своей южной части, на Среднем Урале. Для северной ее части современные данные о возрасте и геохимических особенностях распространенных здесь разнообразных, в том числе и гранитоидных, комплексов пород все...

В пределах Вишерско-Кутимского антиклинория известны рудопроявления золота, пространственно сопряженные с россыпными месторождениями. Исследование рудных минералов показало наличие большого разнообразия сульфидов, сульфоарсенидов, теллуридов и самородных элементов (в том числе благородных металлов), кристаллизовавшихся в несколько стадий. Выделены...

The first data on the Middle Riphean (Stenian) age of the Isherim Formation developed in the synonymous anticlinorium of the North Urals and U–Pb age of detrital zircons from its arkosic sandstones are discussed.

Authors recently described the signs of Grenville (Sveconorwegian) orogeny at the North Urals. At the Isherim anticlinorium the metamorphic aureole of kyanite-sillimanite type (Bely Kamen complex) was researched; the age of metamorphism, determined by Sm-Nd isochrone method from rock-forming minerals fractions, is 973±49 Ma and fits to the Falkenbe...

THE GRENVILLE OROGENY SIGNS IN RIPHEAN SERIES OF NORTH URALS: THERMODYNAMIC PARAMETERS OF METAMORPHISM AND SR-ND ISOTOPE LIMITATIONS Authors recently described the signs of Grenville (Sveconorwegian) orogeny at the North Urals. At the Isherim anticlinorium the metamorphic aureole of kyanite-sillimanite type (Bely Kamen complex) was researched; the...

Abstract—The first data on the Middle Riphean (Stenian) age of the Isherim Formation developed in the synonymous anticlinorium of the North Urals and U–Pb age of detrital zircons from its arkosic sandstones are discussed.

Ишеримский антиклинорий расположен на Северном Урале и является одним из выступов допалеозойского основания Уральской складчатой системы. Возраст и условия формирования достаточно широко распространенных здесь гранитоидов (Мойвинский, Посьмакский, Вёлсовский и другие массивы), являются до настоящего времени дискуссионными. Некоторые исследователи с...

Ранее было установлено присутствие блоков позднепротерозойских (вендских) пород среди палеозойских вулканогенных и интрузивных образований Тагильского островодужного мегаблока на Среднем Урале. Продолжая исследование Тагильской структуры на Северном Урале, авторы выявили присутствие в её западной части блоков трёх допалеозойских магматических и мет...

The results of research of ore content in Pre-Paleozoic black schists of Isherim and Kvarkoush anticlinoriums (North and Middle Urals) are presented. Presence of indications of gold - black schist ore formation is asserted. Well-known object of this type is unique Sukhoi Log deposit. The perspective districts of potential ore clusters are contoured...

Характерной особенностью тиманид на Северном Урале является присутствие среди рифейских толщ интрузий редкометальных орогенных гранитов сальнёрско-маньхамбовского комплекса (массивы Илья-Из, Мань-Хамбо и др.), широко распространенных в южной части Ляпинского мегантиклинория. Полученные нами новые данные о возрасте массивов Торрепорре-Из и Ыджидлягс...

Отработанный в 2006-2008 гг. Полярно-Уральский трансект длиной 300 км – это тре-тий опорный геолого-геофизический профиль нового поколения, пересекающий Уральский ороген. Комплекс полевых наблюдений включал: профилирование методом глубинного МОВ-ОГТ, наблюдения ГСЗ, МОВЗ, МТЗ, геологические исследования в открытой части Урала. Выполнена цифровая об...

The Tagil paleo-island arc terrane is composed of Late Ordovician-Devonian intrusive, volcanic, and volcano-sedimentary complexes. The western margin of the terrane is comprised of dunite-clinopyroxenite-gabbro massifs of the Ural platinum-bearing belt, which are fringed by rock strata of widely different metamorphic grades. Work on isotope systema...

In his works published in the early 20th century, H. Steinman characterized ophiolites as a genetic asso� ciation of peridotites, gabbro, dolerites, and basalts. The Penrose Conference held in 1972 contributed much to generalization of available materials and solution of problems related to the origin, composi� tion, and structure of the ophiolitic...

Abstract—The Tagil paleo�island arc terrane is composed of Late Ordovician–Devonian intrusive, volcanic, and volcano�sedimentary complexes. The western margin of the terrane is comprised of dunite–clinopyrox� enite–gabbro massifs of the Ural platinum�bearing belt, which are fringed by rock strata of widely different metamorphic grades. Work on isot...

New data about Platinum mineralization in Upper Riphean and Vendian (Neoprotherozoic) sedimentary sequences of Central Uralian megazone at Middle and North Urals are presented. The most perspective is gold-platiniferous ore mineralization in carbon-bearing shales. Two productive levels with the gold-platiniferous mineralization are detected – Upper...

The provenance composition and geological evolution of different segments in the distal zone of the Late Vendian foreland basin of the Timan orogen were deciphered on the basis of sequence stratigraphic reconstructions and precision geochemical data on the Upper Vendian fine-grained terrigenous rocks from the Southeast White Sea region, Vychegda, V...

Metamorphism in the northern sector of the Main Uralian Fault (MUF) area, northern Urals, is considered by the example of the Salatim glaucophane-schist and Belokamenka kyanite-staurolite complexes. New isotope-geochronological dates for metamorphic rocks of the MUF area are presented. The obtained data evidence the existence of two metamorphic eve...

The metamorphism of metapelite xenolites from Verkhisetskiy batholith, in vicinity of Ekaterinburg, was the topic of study. Тhe development of atoll (boxy) garnets in association with high-Ca plagioclase (bytownite) and with quite uncommon for contact metamorphism staurolite, is the main mineralogical and textural feature of these rocks, which attr...

The brief characteristic of Low-Paleozoic palaeo-spreading complexes of the Tagil megazone is given. Volcanites of basalt-rhyolite formation are carried to before-Island Arc paleo-spreading complexes, because of Island Arc environments can be restored only from the Early Silurian basalt-andesite-dacite formation level. Geochemical pecularities of v...

The East-Uralian megazone is one of the main Urals structures, which characterized by exclusive complexity of a tectonics. There was a task before paleomagnetic researches to establish presence of horizontal movements and to assess their scale within mentioned megazone. With this purpose it was investigated paleomagnetism of the least changed Paleo...

Deep seismic reflection studies of the new generation were carried out during the last 15 years on the Middle-Urals transect (or ESRU in international identification). Reflection CDP studies were combined with earlier DSS, gravity and magnetic data, with newly acquired results of geochemical, geochronological and geological studies. It allowed to g...

New processing of part of the Europrobe's Seismic Reflection Profiling in the Urals (ESRU) reflection seismic data in the Middle Urals shows a southwest-dipping Moho imbrication and crustal underthrusting that was not previously imaged. The area of thickening associated with it roughly coincides with a deepening of the Moho imaged by the GRANIT ref...

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В статье рассмотрены результаты U-PB (SHRIMP II) датирования цирконов граносиенитов Троицкого массива, расположенного среди осадочных последовательностей верхнего протерозоя Кваркушско-Каменногорского мегантиклинория на западном склоне Среднего Урала, и использованного в середине 1980-х гг. в качестве реперного объекта для датирования нижней границ...

The Serebryanka and Sylvitsa groups on the western slope of the Urals characterize the Vendian section of the eastern folded framework of the East European Platform [1]. They are conspicuous against the background of the coeval platformal sequences by their relatively complete sedimentary record, sufficiently good outcrops, and opportunities for de...

This paper presents the first data on the systematics of rare earth elements (REE), Th, Hf, Sc, Co, Cr, and Ni and the Nd model ages of fine-grained aluminosilicate clastic rocks of the Serebryanka and Sylvitsa groups of the Vendian from the Kvarkushsko-Kamennogorskii meganticlinorium (western slope of the Central Urals). It was found that the REE...

The Urals Seismic Experiment and Integrated Studies (URSEIS), Mikhailovsky, and Europrobe's Seismic Reflection Profiling in the Urals (ESRU) reflection seismic profiles provide constraints for the construction of balanced and restored geological cross sections across the southern and middle Urals foreland. The profiles image the transition from the...

EUROPROBE-related seismic reflection surveys in the Middle Urals, Russia (latitude 56–628) since 1993 have led to an increased understanding of the crustal structure and tectonic evolution of this region. A 400 km long profile now extends from the fore-land basin in the west well into the West Siberian Basin in the east. Bivergent structures charac...

Main geotectonic events, taking place at Scandinavian and Uralian margins of Baltica, are considered. The correlation of some of them is shown; in particular, Caledonian collision of Laurentia and Baltica was in keeping with significant rebuilding of geological sfructures at the Uralian boundary of paleo-continent. The paleomagnetic data from Ural...

This communication is devoted to a reconstruction of the upper crust evolution during the deposition of Vendian sediments that occurred in the Kvarkush-Kamennogorsk Meganticlinorium on the western slope of the central Urals.

Reconstruction of upper crust composition evolution in the period of Vendian sediments accumulation at western slope of the Middle Ural is presented. The analyzed isotopic-geochemical data indicate that the history of the considered Early Vendian rift evolution includes one and not three (as was previously suggested) riftogenesis pulse. The gr-suit...

The description of the Neoprotherozoic magmatic complexes of Kvarkush-Kamennogorsky anticlinorium, their geochemistry and isotope-geochronology data are given. The researh allows us to show presence of definite lateral zoning of magmatism, wich can be called by different-deapth magmatic cameras above mantle plume presence. The possible time of mant...

EUROPROBE-related seismic reflection surveys in the Middle Urals, Russia (latitude 56-62°) since 1993 have led to an increased understanding of the crustal structure and tectonic evolution of this region. A 400 km long profile now extends from the foreland basin in the west well into the West Siberian Basin in the east. Bivergent structures charact...

The purpose of the present work - analysis redox conditions in Early, Middle and Late Riphean, and also in Early and Late Vendian sedimentary basins, which were formed in a zone of the East Europe platform and modern western slope of the Urals junction. For an evaluation redox conditions the datas on the contents V, Cr, Mn, Co, Ni, Mo, Th and U in...

A new compilation of deep seismic reflection data, in combination with the results of recent geological and isotopic investigations, provides the basis for significantly refined structural and evolutionary models of the Middle Urals. Man of the major structural boundaries observed at the surface (e.g. M a in Uralian Thrust, Main Uralian Normal Faul...

Within the hinterland of Urals, there occur a variety of high-grade complexes that have been interpreted to be fragments of continents that were accreted to Baltica during Paleozoic orogeny. Some workers have inferred the high-grade complexes to have rifted off Baltica during the Early Paleozoic; others claim that they were derived from elsewhere (...

This paper deals with the paleomagnetism of the rocks of an early island-arc association within the Shemur volcanotectonic structure in North Ural. It has been established that the natural remanent magnetization of these rocks involves several components caused by different generations of magnetite and hematite. The results of paleomagnetic and geo...

In the Middle Urals, volcanic-arc and back-arc basin rocks of Ordovician to Devonian age occur in the Tagil Synform. These outboard terranes were thrust westwards in the late Carboniferous onto continental margin associations of late Proterozoic and Palaeozoic age, now exposed in the Central Uralian Uplift. The Main Uralian Fault coincides approxim...