scholarly journals Characteristics of taxonomic structure of flora in the Middle Urals urban areas (Sverdlovsk Region)

2016 ◽  
Vol 5 (1) ◽  
pp. 66-71
Author(s):  
Alyona Sergeevna Tretyakova
Keyword(s):  
Species Richness ◽  
Urban Areas ◽  
Taxonomic Structure ◽  
Middle Urals ◽  
The Urals ◽  
Special Investigation ◽  
The Middle Urals ◽  
Urbanized Areas ◽  
High Level ◽  
Urban Floras

Research in urban floras is a major field of botanical science. By now, flora of many Russian cities has been studied. At the same time the Urals flora of urbanized areas has not practically been the subject of special investigation. This paper is the first to provide a detailed description of the features of the taxonomic structure of the flora of urbanized areas of the Middle Urals within the Sverdlovsk region and to compare it with the parameters of the regional flora of the Sverdlovsk region. Urban floras of 3 cities in the southern part of the Sverdlovsk region have been studied - Yekaterinburg, Krasnoufimsk and Kamensk-Ural, which form a latitudinal catena, covering the Urals region, the mountainous part of the Middle Urals and Trans-Urals. It is shown that the flora of the urbanized areas is characterized by a high level of species richness which increases relative to the area of the city. The taxonomic structure of urban floras, compared with the regional flora, is characterized by a reduced participation of spore plants, due to the extremely poor representation of lycopsids. In the flowering plants the proportion of monocots is reduced and, on the contrary, the proportion of bipartite species is increased. The composition of the leading families of urban floras is typical of the boreal floras of the Holarctic floral kingdom, it is distinguished by the lower rank of the Cyperaceae family and by the rise of the Fabaceae family. Generic spectrum of urban floras is marked by the greater participation of thermophilic genera Atriplex and Chenopodium and very limited representation of boreal genera Hieracium and Taraxacum. Species richness of families and genera in urban floras is markedly lower than in regional boreal flora.

The first results of isotopic (U-Pb, ID-TIMS) dating of individual zircon grains from dolerite dikes of the Eastern zone of the Urals

LITOSFERA ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 224-230
Author(s):  
V. N. Smirnov ◽  
K. S. Ivanov ◽  
T. V. Bayanova
Keyword(s):  
Isotope Geochemistry ◽  
Early Carboniferous ◽  
Dynamic Mode ◽  
Middle Urals ◽  
Volcanic Complex ◽  
The Urals ◽  
Electron Multiplier ◽  
The Middle Urals ◽  
Eastern Zone ◽  
First Results

Research subject. The article presents the results of dating two dolerite dikes differing in geochemical features from a section along the Iset river in the area of Smolinskoe settlement (the Eastern zone of the Middle Urals). Materials and methods. The dating was performed by an U-Pb ID-TIMS technique for single zircon grains using an artificial 205Pb/235U tracer in the laboratory of geochronology and isotope geochemistry of the Geological Institute of the Kola Science Centre of the Russian Academy of Sciences. The lead isotopic composition and uranium and lead concentrations were measured using a Finnigan-MAT (RPQ) seven-channel mass spectrometer in dynamic mode using a secondary electron multiplier and RPQ quadrupole in ion counting mode. Results. The dikes were dated 330 ± 3 Ma and 240 ± 2 Ma. Conclusions. The research results indicate different ages of dolerite dikes developed within the Eastern zone of the Middle Urals. The oldest of the two established age levels corresponds to the Early Carboniferous era. This fact, along with the proximity of the dolerites to the petrochemical features of the basaltoids of the Early Carboniferous Beklenischevsky volcanic complex, allows these bodies to be considered as hypabyssal comagmates of these volcanics. The youngest obtained age level – Triassic – indicates that the introduction of some dolerite dikes was associated with the final phases of the trapp formation developed rarely within the eastern outskirts of the Urals and widely further east in the foundation (pre-Jurassic basement) of the West-Siberian Plate.

scholarly journals Newly recorded and rare Desmidiales (Charophyta: Conjugatophyceae) from the Middle Urals, Russia

Check List ◽  
2016 ◽  
Vol 12 (6) ◽  
pp. 2013
Author(s):  
Andrey S. Shakhmatov
Keyword(s):  
Rare Species ◽  
Global Distribution ◽  
Middle Urals ◽  
The Urals ◽  
The Middle Urals

New disributional data on 14 previously unrecorded or rare species and varieties of algae belonging to Closteriaceae, Desmidiaceae, Gonatozygaceae and Peni­aceae (order Desmidiales) are presented for the Middle Urals. Closterium cornu Ehrenberg ex Ralfs, Closterium macilentum Brébisson, Closterium navicula (Brébisson) Lütkemüller, and Cosmarium crenulatum Nägeli are newly recorded to the Urals. A brief description, including measurements of cells as well as regional and global distribution, is given for each taxon.

scholarly journals Structural connections between Urals and West Siberia: the common stage on the boundary of Permian and Triassic periods

2019 ◽  
Vol 488 (3) ◽  
pp. 294-297
Author(s):  
V. N. Smirnov ◽  
K. S. Ivanov
Keyword(s):  
West Siberia ◽  
Strike Slip ◽  
Middle Urals ◽  
The Urals ◽  
The West ◽  
Open Part ◽  
The Middle Urals ◽  
Eastern Zone ◽  
Structural Connections ◽  
The Common

40Ar/39Ar-dating of the micas from the schists and blastomylonites collected from the fault which separates the Eastern zone of the Middle Urals dipped under the cover of the West Siberian plate from the open part of the geologic structures of the Urals, showed that the last phase of deformation was represented by a submeridional sinistral strike-slip faults with the age of 251 Ma. The appearance of the analyzed deformations practically exactly coincides in time with the formation of the grabens of meridional strike at the base of the West Siberian plate. 

scholarly journals Biodiversity-productivity relationship in urban vascular flora: a comparison between wild edible and non-edible plants

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Sebastián Cordero ◽  
Francisca Galvez ◽  
Gastón O. Carvallo
Keyword(s):  
Species Richness ◽  
Urban Areas ◽  
Phylogenetic Diversity ◽  
Evolutionary Relationship ◽  
Biomass Productivity ◽  
Plant Production ◽  
Wild Edible Plants ◽  
Edible Plants ◽  
Edible Plant ◽  
Urban Floras

Background: Wild edible plants are species that are not cultivated but can be consumed as food. These plants may exhibit the highest taxonomic and phylogenetic diversity within urban floras, since they have a longer history of use associated with humans than non-edible plants. Also, because biodiversity is strongly associated with biomass, edible plants plant might show higher productivity (biomass per site) than non-edible plants. Questions: Is taxonomic and phylogenetic diversity of wild edible plants higher than non-edibles within urban areas? Is the alpha-biodiversity of wild edible plants positively related to biomass productivity in urban areas? Study sites and years of study: Cities of the coastal Mediterranean-type ecosystem, central Chile, 2015 and 2016. Methods: We characterized the taxonomic and phylogenetic diversity of urban flora differentiating wild edible and non-edible plants. Then, we assessed whether alpha-diversity of assemblages is related to their biomass productivity. Results: Both taxonomic and phylogenetic diversity were higher for edibles than non-edible plants. For edible plants, biomass was positively related to species richness and negatively with the mean phylogenetic diversity (MPD, a measure of evolutionary relationship among plants within an assemblage). Conclusions: Species richness is a suitable proxy to estimate wild edible plant diversity and their biomass in cities surpassing other proxies, such as phylogenetic diversity. Negative effect of MPD on biomass suggests that only a subgroup of related plants, possibly highly adapted to urban conditions, contribute to edible plant production. The distinction between wild edible and non-edible plants offers a better understanding of the assembly rules and biodiversity-biomass relationship within urban floras.

Character of the distribution and the form of finding platinum group elements in the chromitites of the Svetloborsky, Veresovoborsky and Kamenushensky clinopyroxenite-dunite intrusions (Middle Urals)

2018 ◽  
pp. 60-69
Author(s):  
S. Yu. Stepanov ◽  
R. S. Palamarchuk ◽  
D. A. Khanin ◽  
D. A. Varlamov ◽  
A. V. Antonov
Keyword(s):  
Structural Features ◽  
Platinum Group Elements ◽  
Uneven Distribution ◽  
Middle Urals ◽  
The Urals ◽  
The Middle Urals ◽  
Platinum Group

The note describes the mineralogical and geochemical features of platinum-bearing vein-disseminated and massive chromitite from the dunites of the Svetloborsky, Veresovoborsky and Kamenushensky clinopyroxenite-dunite intrusions located in the Middle Urals. It was found that platinum in chromitites has an extremely uneven distribution and is concentrated in the form of Pt-Fe intermetallides. The texture-structural features of the chromitites studied, the distribution of platinum group elements and the composition of chromoshpinelides in them are similar to the detailed study of the chromitites of the zonal clinopyroxenite-dunite intrusions of the Urals (Nizhnetagilsky) and Koryakia (Gal’moenan).

scholarly journals 40Ar/39Ar age of rock deformations across the Bazhenov suture zone (eastern border of the Middle Urals)

LITOSFERA ◽  
2019 ◽  
pp. 242-249
Author(s):  
V. N. Smirnov ◽  
K. S. Ivanov ◽  
A. V. Travin
Keyword(s):  
Strike Slip ◽  
Suture Zone ◽  
Age Dating ◽  
Middle Urals ◽  
The Urals ◽  
The West ◽  
The Middle Urals ◽  
Deformation Processes ◽  
Eastern Border ◽  
Rock Deformations

Research subject. This article presents data on the nature of rock deformations in the Bazhenov suture zone. The data was obtained by 40Ar/39Ar dating of mica samples from schists and blastomylonites, which were collected acrossan area extending approximately for 100 km along the Bazhenov suture. This suture separates the Eastern zone of the Middle Urals dipped under the cover of the West Siberian plate from exposed geologic structures of the Urals.Methods.The character of the deformations was studied by means of direct geological observation. The age of the deformations was determined by mica dating using the 40Ar/39Ar method.Results. The deformations were found to have occurred in several phases. The initial phase, which led to the formation of a band of blastomylonites and rocks showing a varying degree of schistosity with a width of over 10 km in particular areas, is likely to have had the character of left-lateral fault. The upper age limit of this deformation phase is determined by the intrusion of the subalkaline rocks of the Petukhovskii complex (280 Ma), which had not been affected by any deformation processes. The subsequent type of deformations had been left-lateral strike-slip faults of submeridianal strike and subvertical dip, which were represented by low-thickness (usually about 10 cm, rarely up to 0.5 m) zones of intensely deformed rocks cutting the schistosity of the previous phase at an acute angle. The final phase of the deformations is shown to be a sloping fault. The dislocation planes of this type were represented by slickensides and chlorite incrustations. Despite the apparent polychronicity of the deformation processes, which were established within the Bazhenov suture zone by our geological observations, 40Ar/39Ar age dating identified only one event. The average value of five conducted tests was about 251 Ma. Apparently, this age should be associated with the most recent geological processes having occurred at temperatures sufficient to fully overload the K-Ar isotopic system of the studied rocks, such as the deformations caused by strike-slip dislocations.Conclusions. The strike-slip fault dislocations dated in this work occurred approximately 25 Ma after the completion of the tectonic activity in the Serov-Mauk fault zone, which is located to the west of the Bazhenov zone. In addition, the time of these dislocations very nearly coincides with that of the formation of the grabens of meridional strike at the base of the West Siberian plate, which took place about 250 Ma ago. This supports apreviously made conclusionon the similar character of the geological development of the eastern border part of the Urals and the adjoining basement of the West Siberian plate. 

scholarly journals Assessment of the Flooded Copper Pyrite Pits Impact upon the Middle Urals Water Bodies

2014 ◽  
pp. 77-91
Author(s):  
Keyword(s):  
Surface Water ◽  
Pollution Sources ◽  
Water Bodies ◽  
Middle Urals ◽  
Formation Processes ◽  
The Middle Urals ◽  
Surface Water Bodies ◽  
Copper Pyrite ◽  
High Level

Analysis of pollution sources formation processes in the region of the worked-out and flooded copper pyrite pits of the Middle Urals has been made. Their impact upon surface water bodies’ status has been assessed. It has been shown that after termination of the pits’ operation and their wet conservation the high level of the hydrosphere pollution remains.

scholarly journals Demantoid from the Telyansky Klyuch deposit (Middle Urals) – is the place of the first discovery in the Urals

2020 ◽  
Vol 1 (1) ◽  
pp. 37-46
Author(s):  
Sergey Yur’evich KROPANTSEV ◽  
Keyword(s):  
Chemical Composition ◽  
Microprobe Analysis ◽  
Point Of View ◽  
Historical Study ◽  
Middle Urals ◽  
Gold Placer ◽  
The Urals ◽  
The Middle Urals ◽  
The North ◽  
Main Components

The relevance of the work is due to the need to study the Ural gems, including those discovered in the Urals. This is important not only from a scientific point of view, but for the history of science and the development of geological tourism in our region as well. Purpose of the work: study of the chemical composition of demantoid from the Telyansky Klyuch deposit, which is the site of the first find of this gem in the Urals. Research methodology. Demantoid (green jewelry andradite) was washed by the author in the Telyansky Klyuch gold placer; the quantitative analysis of the chemical composition of garnet was performed using the JXA-733 X-ray electron probe microanalyzer. Results. A historical study of the sites of finds of demantoids in the Middle Urals was carried out. It was established that precious garnet was found not in placers of the Bobrovka river located south of Nizhny Tagil, but in the gold placer of the Telyansky Klyuch to the north of Nizhny Tagil. Microprobe analysis of individual demantoid crystals showed that garnets with different green color saturation according to the main components are andradites with average contents: CaO – 33,18%; Fe2 O3 – 30,74%; SiO2 – 35,02% (for 6 analyzes). The feature of the chemical composition of Telyansky demantoids is the absence or insignificant amount of aluminum impurity in them – not more than 0.02% Al2 O3 , which is practically at the level of microprobe analysis sensitivity for this element. The amount of chromium varies from 0.02% Cr2 O3 in a light green demantoid to 0.5–0.74% Cr2 O3 in green and bright green andradites. Conclusions. The place of the first find of low-impurity and chromium-containing andradites in the Urals with the name of “diamantoite” (proposed by N. G. Nordenskiöld ) is the Telyansky Klyuch gold deposit on the East Tagil dunite-harzburgite massif in the Middle Urals

scholarly journals Zoning of town on undermined territory using GIS software

2020 ◽  
Vol 177 ◽  
pp. 02007
Author(s):  
Pavel Zuev ◽  
Andrey Vedernikov
Keyword(s):  
Middle Urals ◽  
Gold Mine ◽  
Geoinformation System ◽  
The Urals ◽  
Mining Operations ◽  
The Middle Urals ◽  
Lack Of Information ◽  
Other Information ◽  
Underground Workings ◽  
Gis Software

for settlements located near mines and quarries, it is often necessary to zoning areas that are affected by mining operations. Most often, their influence is manifested in the form of subsidence of the earth's surface, sometimes sinkholes. It is particularly relevant for the "factory-type" towns of the Urals, where historically industrial settlements developed together and on the basis of mining and metallurgical industries, often having common borders. After decades, and sometimes centuries, the justified and safe use of these territories causes serious problems due to fragmentation and lack of information about their condition. A similar problem was encountered by the Berezovskiy town in the Middle Urals, most of whose territory was undermined. The closure and subsequent flooding of part of the mines of the previously city-forming gold mine led to the need to study its territory. To do this, a method was developed and zoning was performed in a step-by-step manner in the geoinformation system, and the consequences of flooding were established. In the process of implementation, all the engineering-geological, geodetic and other information provided by the mine was used. The results are unique due to the uniqueness and heterogeneity of the parameters of underground workings, sinkholes on the earth's surface caused by workings that are densely located on the studied territory.

scholarly journals Crustal structure of the Middle Urals: Results from the (ESRU) Europrobe seismic reflection profiling in the Urals experiments

Tectonics ◽  
1998 ◽  
Vol 17 (5) ◽  
pp. 710-725 ◽  
Author(s):  
C. Juhlin ◽  
M. Friberg ◽  
H. P. Echtler ◽  
T. Hismatulin ◽  
A. Rybalka ◽  
...  
Keyword(s):  
Crustal Structure ◽  
Seismic Reflection ◽  
Middle Urals ◽  
The Urals ◽  
The Middle Urals ◽  
Seismic Reflection Profiling
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