scholarly journals MAFIC INCLUSIONS (SOBSKY COMPLEX, POLAR URAL): U‐Pb (SIMS) DATA

2019 ◽  
Vol 10 (2) ◽  
pp. 265-288 ◽  
Author(s):  
О. V. Udoratina ◽  
М. A. Coble ◽  
A. S. Shuyskiy ◽  
V. A. Kapitanova
Keyword(s):  
Geochemical Data ◽  
Textural Features ◽  
Basic Composition ◽  
Fine Grained ◽  
Polar Urals ◽  
Composition Of Minerals ◽  
Host Rocks ◽  
Polar Ural ◽  
The Polar Urals

The rocks of the Sobsky complex, composing the bulk of the Sobsky batholith in the Polar Urals, contain mafic inclusions. The geological, petrographic and petro‐geochemical data show that the mafic inclusions of the Sobsky rocks belong to igneous formations, which are similar in their characteristics to autoliths. According to all the characteristics, these are the structures non‐contrasting to host rocks and having different structural‐textural features, a more basic composition of minerals and a more basic composition of rocks. The contact with the rocks of the complex is sharp and clear. The rocks of the complex in contact with autoliths are medium‐grained massive diorite rocks, quartz diorites, tonalites, mafic inclusions rocks – fine‐grained gabbros, gabbro‐diorites, and diorites. Isotopicgeochemical (U‐Pb, SIMS) data on zircons from the mafic inclusions suggest that their age is close, within the error limits, to the age of zircons from the enclosing Sobsky complex rocks.

scholarly journals First results of U-Pb LA-SF-ICP-MS-dating detrital zircons from the middle riphean (?) terrigenous deposits of the Polar Urals

2019 ◽  
Vol 485 (4) ◽  
pp. 488-492
Author(s):  
N. S. Ulyasheva ◽  
Yu. I. Pystina ◽  
A. M. Pystin ◽  
O. V. Grakova ◽  
V. B. Hubanov
Keyword(s):  
Dominant Role ◽  
Detrital Zircons ◽  
Entire Series ◽  
Polar Urals ◽  
Icp Ms ◽  
First Results ◽  
Age Range ◽  
Polar Ural ◽  
The Polar Urals

The first results of U-Pb LA-SF-ICP-MS-dating of detrital zircons from terrigenous deposits of the Miniseishor suite of the Nyarovei series of the Harbei anticlinorium of the Polar Urals are presented. The series has a presumably Middle Riphean age and lies at the base of the section of the Polar Ural Upper Precambrian. The data obtained give grounds to limit the lower age interval for the formation of sediments of the Minisejshor suite abroad 660 million years ago. Allotment the Nyarovei series as a Middle Riphean straton is erroneous. Formation of the whole cut the Nyarovei series occurred in a relatively narrow age range at the end of the late Riphean. The dominant role in the formation of deposits of the entire series belonged to the products of erosion close arrays of deeply metamorphosed rocks.

scholarly journals Pollen spectra of Polar Ural glaciers

2020 ◽  
pp. 1-14
Author(s):  
Alla Constantinovna Vasil'chuk ◽  
Yurij Kirillovich Vasil'chuk
Keyword(s):  
Mountainous Area ◽  
Mountain Range ◽  
The Urals ◽  
Polar Urals ◽  
Range Transport ◽  
Pine Pollen ◽  
The Subject ◽  
Pollen And Spores ◽  
Polar Ural ◽  
The Polar Urals

The subject of this article is the pollen spectra of the samples from the surface of Romantic's Glacier, located in the Polar Urals in the Rai-Iz mountain range, as well as generalization of the results of published studies dedicated to glaciers of the Urals. The author also examines the pollen spectra of massive ice, which can be attributed to ice of atmospheric origin on the basis of similarity with the pollen spectra obtained from the surface of the glacier. The article reviews climatic peculiarities of the Polar Urals due to the existence of glaciers below the snow line, namely the landscapes of the Polar Urals, including vegetation as a source of pollen and spores falling onto the surface of glaciers of the Polar Urals, as well as possibility of distant pollen drift to the surface of Romantic’s Glacier. The main result consists in the conclusion that the composition pollen spectra of the Romantic’s Glacier in the Rai-Iz mountainous area is mainly determined by the long-range transport of pollen and spores from the western and south-western regions in a latitude direction. The pollen spectra obtained from the surface of the Romantic’s Glacier are characterized by significant presence of various pollen from broad-leaved rocks of lip, maple, oak, and hazel. Pine pollen and high forest birch are prevalent. Local vegetation is very poor. However, the pollen spectra indicates pollen of heath and crowfoot family, and grasses.

scholarly journals Cyanobacterial Diversity of the Northern Polar Ural Mountains

Diversity ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 607
Author(s):  
Denis Davydov
Keyword(s):  
Similarity Index ◽  
Morphological Characteristics ◽  
Published Data ◽  
Ural Mountains ◽  
Russian Territory ◽  
Polar Urals ◽  
Cyanobacterial Diversity ◽  
First Time ◽  
Polar Ural ◽  
The Polar Urals

This study provides new results from an inventory of cyanobacterial species from the Northern Polar Ural Mountains. The article also compiles all existing published data on the cyanobacterial diversity of the region. This ecoregion is located in a unique geographical position in the transition between the sub-Arctic and low Arctic zones and heterogeneous natural conditions. Likely, the unexplored biodiversity of this area’s terrestrial cyanobacteria is high. In total, 52 localities were studied, with 232 samples collected. Cyanobacterial samples were studied under a light microscope. Species were identified based on morphological characteristics only. A total of 93 species of cyanobacteria were identified in different habitats; 70 species were found on wet rocks, 35 on the shores of water bodies, 27 in slow streams, and 21 on waterfalls. In total, 37 species are reported as part of the Ural flora for the first time, while three species (Chroococcus ercegovicii, Gloeocapsopsis cyanea, Gloeothece tepidariorum) were detected in Russian territory for the first time. The composition of the cyanobacterial flora of the Polar Urals was compared with the flora of the nearby Arctic and sub-Arctic regions. According to the Sorensen similarity index, the Polar Urals’ flora is more like the flora of Nenets Autonomous Okrug.

New records of two species in the genus Pseudobaeospora (Basidiomycota, Agaricales) from Russia

2013 ◽  
Vol 47 ◽  
pp. 127-134
Author(s):  
O. V. Morozova ◽  
E. S. Popov
Keyword(s):  
Type Species ◽  
Nature Reserve ◽  
New Records ◽  
Line Drawings ◽  
Polar Urals ◽  
State Nature Reserve ◽  
State Nature ◽  
The Polar Urals

The paper describes two records of species of the genus Pseudobaeospora Singer emend. Bas. P. pillodii (Quel.) Wasser, collected in 2009 in the Teberda State Nature Reserve, was found before in Altai [reported as P. oligophylla (Singer) Singer, the type species of the genus], as well as in the Polar Urals. P. pyrifera is new to Russia. The descriptions are illustrated by line drawings and colour photographs.

Expanding forests and changing growth forms of Siberian larch at the Polar Urals treeline during the 20th century

2008 ◽  
Vol 14 (7) ◽  
pp. 1581-1591 ◽  
Author(s):  
NADEZHDA DEVI ◽  
FRANK HAGEDORN ◽  
PAVEL MOISEEV ◽  
HARALD BUGMANN ◽  
STEPAN SHIYATOV ◽  
...  
Keyword(s):  
20Th Century ◽  
Siberian Larch ◽  
Growth Forms ◽  
Polar Urals ◽  
The Polar Urals

scholarly journals Clitellate worms (Annelida) in lateglacial and Holocene sedimentaryDNArecords from the Polar Urals and northern Norway

Boreas ◽  
2018 ◽  
Vol 48 (2) ◽  
pp. 317-329 ◽  
Author(s):  
Youri Lammers ◽  
Charlotte L. Clarke ◽  
Christer Erséus ◽  
Antony G. Brown ◽  
Mary E. Edwards ◽  
...  
Keyword(s):  
Northern Norway ◽  
Polar Urals ◽  
The Polar Urals

scholarly journals Two series of primary magmatic rocks in the Marun-Keu eclogite-gneiss complex, the Polar Urals

2015 ◽  
Vol 2015 (11) ◽  
pp. 3-12 ◽  
Author(s):  
N. S. Ulyasheva ◽  
◽  
A. M. Pystin ◽  
A. V. Panfilov ◽  
I. L. Potapov ◽  
...  
Keyword(s):  
Polar Urals ◽  
Magmatic Rocks ◽  
Gneiss Complex ◽  
The Polar Urals

scholarly journals Monitoring of glaciers in the Polar Urals using remote sensing Data

2020 ◽  
Vol 217 ◽  
pp. 04003
Author(s):  
Natalia Martynova ◽  
Valentina Budarova ◽  
Artem Sheremetinsky ◽  
Nikita Mezentsev
Keyword(s):  
Remote Sensing ◽  
Technological Progress ◽  
Satellite Images ◽  
Research Question ◽  
Remote Sensing Data ◽  
Field Work ◽  
Sources Of Information ◽  
Sensing Data ◽  
Polar Urals ◽  
The Polar Urals

The development of technological progress provides more opportunities for indirect monitoring of changes in the environment. Remote sensing is one of The most accessible and reliable sources of information. In this work, we used satellite images from the Landsat family. The theoretical justification of the research question is given. The research methodology was developed. Collection and processing of satellite images for various time periods. A series of schematic maps based on remote sensing Data has been created. As a result of digitization of satellite images, 9 glacier contours were obtained by year. We determined the area of the Romantics glacier and found that it lost at least 60% of its original area. These studies were used to build a series of cartographic schemes that clearly show the reduction of the glacier area. It is concluded that the use of remote sensing allows you to solve problems, monitoring the object. The use of this method allows not only to save time for field work, but also material costs for expedition equipment and various equipment. This method can be tested on any objects.

scholarly journals Zonality of ore-forming chrome spinels of medium-chrome and aluminous chromitites of the Voikaro-Syninsky massif

2021 ◽  
pp. 39-47
Author(s):  
Pavel Borisovich SHIRYAEV ◽  
◽  
Nadezhda Vladimirovna VAKHRUSHEVA ◽  
Keyword(s):  
Oxidation State ◽  
Chromium Content ◽  
Ultramafic Rocks ◽  
Work Study ◽  
Chemical Zoning ◽  
Polar Urals ◽  
The Core ◽  
Ore Bodies ◽  
Scientific Papers ◽  
The Polar Urals

Relevance of the work. The conditions for the formation of chromium ores in alpine-type ultramafites remain a topical subject of research. In recent years, scientific papers have focused on the issue of changing the chemical composition of ore-forming minerals and chromium ores under the influence of deformation and dynamic recrystallization processes accompanying metamorphism. The results of such studies make it possible to formulate a new model of the formation of chromium mineralization taking into account a significant amount of geological data indicating that alpine-type ultramafic rocks are “mantle tectonites”. In our work, we have studied zonal ore-forming spinels from chrome ores of the Polar Urals. The results of the study make it possible to associate the formation of chemical zoning in minerals and ore bodies with recrystallization under the influence of stress tension. Purpose of the work – study of the conditions for the formation of chemical zoning of chromium spinels from alumina and medium chromium ores of the Voikaro-Syninsky massif. Results. Zonal ore-forming spinels from medium-chromium and aluminous chromitites of the Voikaro-Syninsky massif (Polar Urals) have been studied. It was found that replacement rims are developed along the grains of oreforming spinels with an increased content of Cr2 O3 and an oxidation state of iron in relation to the core, as well as a reduced content of Al2 O3 . The oxidation state of iron in the rims of most grains does not exceed the values typical for unaltered ore-forming spinels. T–fO2 parameters of zoning formation in spinels were determined by oxythermobarometry. Comparison with zoned chrome spinels of the Golyamo Kamenyane massif (Bulgaria). Conclusion. Metamorphic transformations of alumina and medium-chromium chromitites of the Voikaro-Syninsky massif, occurring under subcrustal conditions under the action of directional stress at relatively constant T–fO2 parameters, lead to an increase in the chromium content of the ore mineral.

scholarly journals Metallogenic Specialization Of Sienitoid Small Intrusions And Dikes Of The Kumbel-Ugam Zone Of Depth Faults (Chatkal-Kurama Region, Middle Tian Shan)

2020 ◽  
Vol 6 (4) ◽  
pp. 547-576
Author(s):  
U.D. Mamarozikov ◽  
◽  
G.M. Suyundikova ◽  
S.V. Kirezidi ◽  
◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Metals ◽  
Mass Spectrometric Study ◽  
Mass Spectrometric ◽  
Material Composition ◽  
Geochemical Data ◽  
Spectrometric Study ◽  
Rare Metals ◽  
Deep Faults ◽  
Composition Of Minerals

The article describes the geological, petrographic, mineralogical and geochemical data confirming comagmatic nature of syenitoid small intrusions and dikes of the Kumbel-Ugam zone of deep faults. Specialty of syenitoids and related metasomatites and hydrothermalites for precious and rare metals is described on the basis of the results of microprobe analyzes of the forms of occurrence, the material composition of minerals, micro segregations of ore-bearing silicon-alkaline fluids and nanocrystallites in them. The results of mass-spectrometric study of syenitoids confirm their metallogenic specialization in noble, rare and rare earth metals.

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