U-Pb age and metamorphism of rocks of Voshnevogorsky sequence (South Ural)

2020 ◽  
pp. 51-62
Author(s):  
A. A. Krasnobaev ◽  
P. M. Valizer ◽  
E. V. Medvedeva ◽  
A. B. Nemov ◽  
A. L. Perchuk
Keyword(s):  
Southern Urals ◽  
Ion Microprobe ◽  
The Urals ◽  
The Southern Urals ◽  
Geochemical Study ◽  
Age Range ◽  
Host Rocks ◽  
Eastern Domain ◽  
Proterozoic Age

In the article present results of U-Pb — dating of zircons and petrologic-geochemical study of garnet-biotite plagiogneises and quartz-plagioclase-amphibole granofels host rocks samples from Vishnevogorsky sequence of the oldest rocks of the southern Urals Eastern domain are presented. U-Pb-dating of zircons were obtained by ion microprobe (SHRIMP II). The maximum age of the substrate plagiogneises Vishnevogorsky sequence not younger than 2700 Ma, and granulitic metamorphism plagiogneises falls on the Proterozoic age range 1740–2220 Ma. The dates obtained for plagiogneises and granofels Vishnevogorsky sequence reflect all major (PR1–P1) age stages of the Urals development. Many of the dated events are manifested only in the zircons generation and are not reflected in the mineral paragenesises of the studied rocks.

scholarly journals Early Permian granitoids of the East Magnitogorsk zone (South- ern Urals): petrology, geochemistry, and geodynamic formation environment

2020 ◽  
Vol 1 (1) ◽  
pp. 47-62
Author(s):  
Timofey Nikolaevich SURIN ◽  
Keyword(s):  
Water Pressure ◽  
Southern Urals ◽  
Geodynamic Setting ◽  
Type I ◽  
Early Permian ◽  
The Southern Urals ◽  
Quartz Syenite ◽  
Crystallization Differentiation ◽  
Geochemical Study

The relevance of the problem. The Early Permian magmatism of the Southern Urals is poorly studied with the help of modern methods. The granitoid massifs of this age locally developed in the East Magnitogorsk zone contain important information about the geodynamic conditions of their formation. Clarification of this issue makes an important contribution to the understanding of the geodynamic development of the Urals. The nature of granitoids is still debatable. The connection with the massifs combined in the Balkan complex of gold-tungsten mineralization indicates the need for a comprehensive study. The purpose of the study is to determine the petrological and geochemical features of the rocks of the Balkan complex, to identify the mechanism of their petrogenesis and to establish the geodynamic conditions of their formation. Results. The petrological and geochemical study of the formations of the Balkan complex was carried out and their place in the typical taxonomy of granitoids was determined. Their belonging to the I-type is shown. Mineralogical and petrogeochemical methods were first studied for shonkinite xenoliths in granitoids. The mechanism of petrogenesis of rocks is proposed and the geodynamic setting of their formation is determined. It is shown that the monzonitemonzodiorite-quartz syenite-granosyenite-leucogranite series of rocks was formed as a result of crystallization differentiation of a single parental melting, and it was also concluded that the massifs of the complex are formed under conditions of early collision conditions with the important role of the subduction process. The mechanism of formation of the massifs of the complex is largely similar to mechanism for granitoids in other conflict areas, although it has its own specifics. Conclusions. 1). The Early Permian granitoids of the Balkan complex relates to type I. 2). All rocks of the complex, from monzonites to quartz syenites and leucogranites, including xenolith shonkinites, form a petrogenetic series formed as a result of crystallization differentiation of a single parent alkaline-gabbroic melting with increased water pressure. 3). The Balkan complex was formed in an early collisional setting under the action of deep subduction. 4). Transpression in the upper part of the crust induced formation of the massifs of the complex. 5). The Balkan complex is a kind of indicator of the growth of the newly formed crust as a result of collision and accretion processes.

scholarly journals The sources of zircons in clastic rocks of the Riphean deposits of the Urals

2019 ◽  
Vol 488 (4) ◽  
pp. 413-419
Author(s):  
A. A. Krasnobaev ◽  
V. N. Puchkov ◽  
N. D. Sergeeva ◽  
S. V. Busharina
Keyword(s):  
Southern Urals ◽  
Detrital Zircons ◽  
The Other ◽  
The Urals ◽  
The Southern Urals ◽  
Clastic Rocks ◽  
Lower Riphean ◽  
Age Variations ◽  
Age Determinations

New age determinations of detrital zircons of sandstones augmented the possibilities of interpretation of their provenance. This interpretation is often restricted by a formal comparison of age-and-composition characteristics of detrital crystals with any very distant model objects. A different situation arises when the role of a source of a detritus is claimed by local objects. The analysis of SHRIMP and TIMS - datеs of zircons and U and Th concentrations in them, and also a comparison of histograms of primary zircons from Riphean volcanics and rocks of the Taratash complex on one hand and the detrital zircons from the sandstones of Vendian (Asha series) and Lower Riphean (Ai Formation) on the other, have shown that the age variations of sources and clastics are comparable in many aspects. It means that the age characteristics of primary zircons from the Riphean volcanics and rocks of the Taratash complex as sources of zircon clastics for the Riphean and Vendian sandstones in the Southern Urals are regulated by processes of resedimentation, though the influence of distant sources is not excluded.

scholarly journals METEORIC IRON IN PRODUCTION AND RELIGIOUS PRACTICE OF THE YAMNAYA CULTURE IN THE URALS REGION

2021 ◽  
pp. 190-206
Author(s):  
Н. Л. Моргунова ◽  
М. А. Кулькова ◽  
А. М. Кульков
Keyword(s):  
Isotope Analysis ◽  
Southern Urals ◽  
Religious Practice ◽  
The Urals ◽  
The Southern Urals ◽  
Middle Volga Region ◽  
Radiocarbon Data ◽  
Middle Volga ◽  
New Research ◽  
Functional Purpose

Среди курганов ямной культуры Среднего Поволжья и Южного Приуралья особое место занимают монументальные сооружения с находками изделий из железа. Выделяются предметы как производственного, так и ритуального назначения. По данным радиоуглеродного анализа курганы датируются в пределах первой половины III тыс. до н. э. В 2019 г. авторами на современном оборудовании проведены новые исследования химического состава поверхности металлических предметов, изотопный анализ свинца, а также реставрация железных предметов. Дополнительные исследования позволили подтвердить метеоритное происхождение железа, уточнить форму и функциональное назначение изделий. Анализ погребального обряда и инвентаря из меди и метеоритного железа позволяет сделать вывод, что курганы были предназначены для «супер-лидеров». При жизни они могли выполнять управленческие, военные и сакрально-ритуальные функции. Наличие предметов из железа свидетельствует об обожествлении власти вождей и о распространенном представлении связи лидерства и небесных сил. Large burial constructions that have yielded items made from iron occupy a special place among the Yamnaya kurgans in the Middle Volga region and the Southern Urals. It is possible to single out both production items and artifacts used for religious purposes. The radiocarbon data put the kurgans around the first half of III mill. BC. In 2019 the authors conducted new research of the chemical composition of the metal item surface, using modern equipment, performed the stable isotope analysis of the lead and carried out the restoration works of the iron objects. The additional studies provided an opportunity to confirm the meteoric origin of the iron, clarify the shape and the functional purpose of the artifacts. It can be inferred from the analysis of the funerary rite and the offerings made from copper and meteoric iron that the kurgans were intended to bury super leaders. During their lifetime such chieftains could perform management, military and sacral ritual functions. Presence of iron items suggests that the power of the chieftains was deified and the idea of the links between the leadership and heavenly forces was quite common.

scholarly journals New data on geology of the Southern Urals: a concise summary of research after the period of EUROPROBE activity

2016 ◽  
Author(s):  
Victor Puchkov
Keyword(s):  
Southern Urals ◽  
The Urals ◽  
The Southern Urals ◽  
Research Institutes ◽  
To Come

Abstract. The period of an official activity of the EUROPROBE commission was inconnected in the Urals with implementation of the URALIDES Program, that stimulated many qualified geologists from the Western research institutes and Universities to come to the region and work with local geologists at actual problems of the Uralian geology. The author tries to answer a question: what interesting results had been obtained in the Southern Urals in the last decade, when the most of foreign researchers left the Urals, and how these results correspond to the scientific conclusions that had been done before.

scholarly journals The Patriotic War of 1812 and the Foreign Campaigns of 1813-1814 in the Historical Memory of the Peoples of the Urals

2021 ◽  
Vol 20 (2) ◽  
pp. 192-204
Author(s):  
Vladimir N. Zemtsov
Keyword(s):  
Historical Memory ◽  
Southern Urals ◽  
Ural Region ◽  
School Level ◽  
Educational Institutions ◽  
Global History ◽  
The Urals ◽  
The Southern Urals ◽  
The Russian Federation ◽  
Military Production

The article identifies the features of the Ural region in terms of preserving and updating the memory of the epoch of 1812-1814. Based on the analysis of various options for preserving images of the epoch (through living memory, materialized memory, festive events and other means), the author comes to the conclusion that the Ural region, despite its remoteness from the theater of war, organically fit into the all-Russian memorial context. At the same time the memory is shaped by the regions focus on military production, and by its providing a significant part of the irregular cavalry recruited from the Orenburg Cossacks and non-Russian peoples. The latter circumstance, through images of Northern cupids, gave the Urals an exotic fame abroad. Forms of preserving Urals memory of the events of 1812-1814 range from variants of living memory, which includes elements left over from the communicative memory, to purposeful activities of central and local authorities to organize mass events at anniversary dates. A significant role in memory preservation is traditionally played by educational institutions, which, starting from the school level, form the memory of childhood. The greatest concentration of memory elements related to the epoch is observed in the Southern Urals, which is predetermined, to a large extent, by the presence of compactly living non-Russian peoples who seek to emphasize their role in the events of all-Russian and even global history. Unlike a number of other national regions of the Russian Federation, the appeal to historical memory in the Urals takes place within the framework of a unifying and reconciling tradition. Despite some commemorative gaps, the three epochs (pre-Soviet, Soviet and post-Soviet) in relation to the historical memory in the Urals about the events of 1812-1814 look quite organic. Images of this great time continue to act as a unifying factor, thus preserving the sense of a common past not only with the all-Russian, but also with common European and global history.

Naturally spreading and natural apple dwarfs in the forest-steppe zone of the Southern Urals

2020 ◽  
Vol 62 ◽  
pp. 70-76
Author(s):  
O. E. Merezhko ◽  
M. A. Mazunin ◽  
E. Z. Savin ◽  
A. I. Gridnev
Keyword(s):  
Unit Area ◽  
Steppe Zone ◽  
Southern Urals ◽  
South Urals ◽  
Forest Steppe ◽  
Labor Costs ◽  
The Urals ◽  
The Southern Urals ◽  
Apple Trees ◽  
Early Maturity

The article presents tests of natural creeping apple trees and natural dwarfs, carried out in the in the conditions of the Orenburg region. There were from 50 to 100 trees in the experiment in each variant. Vigorous standard plantations were used as control. The aim of the research was to test natural creeping apple trees, natural dwarfs against the background of standard varieties bred in the South Urals (Chelyabinsk), as well as to determine their prospects for intensive horticulture in the extreme conditions of the region. The preservation of plantings for all variants of the experiment for 20 years of research is high and amounted to 92-99 %, their condition was estimated at 4.5-5.0 points. The highest yield was noted for natural dwarfs (457.2 c/ha), the smallest yield was obtained on vigorous standard plantings (control) – 238.7 c/ha. Naturally creeping apple trees in terms of productivity were higher than control by an average of 25 %. Of the naturally creeping varieties, the most productive were the varieties Podsnezhnik (348.3 c/ha), Chudnoe (335.2 c/ha), the least productive were the varieties Plastun and Kovrovoe (255.1 and 262.5 c/ha, respectively). On the natural dwarfs, the most productive variety was the variety Brat Chudnogo (461.2 c/ha). In the control, the most productive varieties were the varieties Symbol (295.9 c/ha) and Nadezhda (270.5 c/ha), less productive were the varieties Pamyat Zhavoronkova and Fevralskoe (208.0 and 224.1 c/ha, respectively). Low-growing plantations, in particular layer and natural varieties of the Urals, are distinguished by their early maturity and, in general, higher productivity per unit area. The highest labor costs are accounted for by natural dwarfs (485.4 person-day/ha) and the lowest in vigorous plantings (317.4 person-day/ha). This has a positive eff ect on the profit and rentability of production.

scholarly journals Zircons of the Permian age (280–290 Ma) from intrusive magmatic rocks in Riphean structure of the Southern Urals

LITOSFERA ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 601-608
Author(s):  
A. A. Krasnobaev ◽  
V. N. Puchkov ◽  
N. D. Sergeeva ◽  
S. V. Busharina
Keyword(s):  
Southern Urals ◽  
Lower Permian ◽  
The Urals ◽  
Shrimp Dating ◽  
The Southern Urals ◽  
Lower Paleozoic ◽  
Magmatic Rocks ◽  
Lower Riphean ◽  
Granite Complex ◽  
A Chain

Research subject. Magmatic complexes that are developed in the lower (volcanogenic-sedimentary) part of the Ai Formation of the Lower Riphean of the Taratash anticline in the Southern Urals. Results. For the frst time, the Lower Permian SHRIMP dating (288.6 ± 3.1 Ma by U-Pb method on zircon from monzogabbro) was obtained for a dike cutting the basalts of the Lower Paleozoic (420–450 Ma) age. Conclusions. On the eastern slope of the Urals there is a chain of massifs which are close in the age. The chain belongs to the Lower Permian Stepninsky monzogabbro-granosyenite-granite complex, represented by the Uiski, Vandyshevski, Biryukovski and Stepninski intrusions with the age of 281 ± 2, 280 ± 2 and 286 ± 2 Ma, correspondingly (U-Pb method after zircons, SHRIMP-II, VSEGEI) and earlier obtained dates 281 ± 4 Ma (Rb-Sr isochrone) and 283 ± 2 Ma (isotope Pb-Pb method after zircons). The Stepninsky complex was described earlier as plume-dependent. The monzogabbro dike, described in this paper, although being at a considerable distance from the Sepninsky complex, is situated at a strike of the chain of the stepninsky intrusions, is close to them by the composition and age and can be ascribed to the same plume episode. The idea of the plume character of the complex was ехрressed by us relatively long ago based on a superimposed character of the chain of the intrusions over the earlier, collisional Uralian structures. As for the geochemical character (monzogabbro) the dike conforms with one of two standard trends of the Stepninsky complex – monzonite (monzogabbro, monzodiorites, syenites).

scholarly journals The Lower Precambrian in the structure of paleozoic in the Subpolar Urals

2019 ◽  
Vol 486 (5) ◽  
pp. 572-576
Author(s):  
Yu. I. Pystina ◽  
A. M. Pystin ◽  
V. B. Hubanov
Keyword(s):  
Southern Urals ◽  
Western Slope ◽  
Geochronological Data ◽  
The Urals ◽  
The Southern Urals ◽  
Early Precambrian ◽  
Subpolar Urals ◽  
Late Precambrian ◽  
Lower Riphean ◽  
First Time

In many polymetamorphic complexes of the Urals, rocks with Early Precambrian age marks have been established. But only with respect to the two polymetamorphic complexes located on the western slope of the Southern Urals: the Taratash and Aleksandrov, their indisputable belonging to the Archean-Paleoproterozoic section is recognized. They are framed by weakly metamorphosed Lower Riphean sediments and reliable geochronological data are obtained from them, which unambiguously indicate the Early Precambrian age of rock metamorphism. The available Early Precambrian age datings for other Ural polymetamorphic complexes (with the prevailing number of Late Precambrian and Paleozoic age values) are interpreted differently. Therefore, their attitude to the Lower Precambrian section has been disputed by many researchers. In the article, for the first time, based on the results of mass U-Pb dating of metamorphic zircons from the gneiss of the Nyrtin polymetamorphic complex of the Subpolar Urals, taking into account the available data, the Paleoproterozoic age of the earliest stage of rocks metamorphism (2127 ± 31 Ma) is substantiated. This gives grounds to assert that the complex under consideration, as well as the Taratash and Alexandrov complexes of the Southern Urals, belongs to the Lower Precambrian formations involved in the structure of Uralides.

scholarly journals Arachnids (Araneae, Opiliones) from grass stand and forest litter in the Urals, Russia

2020 ◽  
Vol 8 ◽  
Author(s):  
Alexey Nesterkov ◽  
Maxim Zolotarev ◽  
Elena Belskaya ◽  
Tatyana Tuneva
Keyword(s):  
Southern Urals ◽  
Southern Taiga ◽  
Taiga Zone ◽  
Natural Ecosystems ◽  
Ural Mountains ◽  
The Urals ◽  
The Southern Urals ◽  
Long Term Monitoring ◽  
Term Monitoring

Since the late 1980s, long-term monitoring of various components of natural ecosystems under conditions of industrial pollution has been carried out in the Central Urals. In the mid-2000s, similar programmes were started in the Southern Urals. As a part of these monitoring programmes, the data on invertebrates in different types of biotopes, collected with different methods and in a different time intervals, continue to be gathered. Amongst the most well-studied groups of invertebrates are spiders and harvestmen whose communities are a convenient indicator of the environment. The data collected through these monitoring programmes can also be used to study natural local biodiversity. The dataset, presented here, includes information from a long-term monitoring programme for Araneae and Opiliones that inhabit grass stands of secondary dry meadows and litter of spruce-fir, aspen-birch and pine-birch forests in the Central and Southern Urals. The dataset (available from the GBIF network at https://www.gbif.org/dataset/e170dbd1-a67f-4514-841c-5296b290ca90) describes the assemblage structure of spiders and harvestmen (list of species and their abundance), age-sex composition and seasonal and inter-annual dynamics for two large areas in the southern taiga zone of the Ural Mountains. The dataset includes 1,351 samples, which correspond to 5,462 occurrences identified during 2004–2009, 2013 and 2018. In total, we collected 10,433 specimens, representing 178 species (36% of arachnofauna of the Urals), 115 genera (54%) and 23 families (100%). Most of the data (4,939 of 5,462 occurrences, 90%) were collected in the western macro-slope of the Ural Mountains (European part of Russia), the rest in the eastern macro-slope (Asian part). All represented data were sampled in industrially undisturbed areas and are used as a local reference for ecotoxicological monitoring. The dataset provides new useful information for recording the state of biodiversity for the Central and Southern Urals and contributes to the study of biodiversity conservation.

scholarly journals South Urals and Rudny Altai: a comparative paleovolcanic and metallogenic analysis

2019 ◽  
Vol 61 (2) ◽  
pp. 3-22
Author(s):  
I. B. Seravkin ◽  
A. M. Kosarev
Keyword(s):  
Volcanic Rocks ◽  
Southern Urals ◽  
Massive Sulphide ◽  
South Urals ◽  
The Urals ◽  
The Southern Urals ◽  
Central Type ◽  
General Terms ◽  
Massive Sulphide Deposits ◽  
Sulphide Deposits

A comparative paleovolcanic and metallogenic analysis of two massive-sulphide-bearing regions, the Southern Urals and Ore Altai, located in different parts of the Ural-Mongolian folded belt, was performed. Comparison of the geodynamic evolution of these areas, the formation and facies composition of the ore-bearing strata and types of massive-sulphide deposits has led to the conclusion that the regions are similar only in the most general terms. Fundamental differences in the structure and composition of the crust of the regions led to differences in the profile of island-arc magmatism: basaltoid in the Southern Urals and rhyolitoid in Ore Altai. This, in its turn, determined the predominant composition of massive-sulphide mineralization: copper-zinc in the first of the regions and polymetallic — in the second. Opposite tendencies in the evolution of volcanism are also characteristic: homodromic in the Southern Urals and antidromic in the Ore Altai, which resulted in a different position of the types of massive-sulphide deposits in the ore districts: the bottom-up change of copper — massive-sulphide deposits by the massive-sulphide -polymetallic in the Southern Urals and barite polymetallic by massive-sulphide polymetallic and copper- massive-sulphide in the Ore Altai. Significant differences are also in the lateral distribution patterns of mineralization: a more pronounced control of mineralization by paleovolcanic structures of the central type in the Southern Urals and the frequent position of mineralization in intermediate and remote facies of volcanism in the Ore Altai, which is reflected in the prevalence of volcanic sections in the Urals and the majority of the volcanic sections and the larger majority of the volcanic rocks in the Ore Altai, which is reflected in the prevalence of volcanic rocks in the Urals and the majority of the volcanic sections and in the Ore Altai most of the volcanic minerals and the larger majority of the mineral rocks (20–80%) in the strata containing mineralization in the Ore Altai.

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