scholarly journals High‐resolution chronology of 24 000‐year long cores from two lakes in the Polar Urals, Russia, correlated with palaeomagnetic inclination records with a distinct event about 20 000 years ago

2021 ◽  
Author(s):  
Haflidi Haflidason ◽  
Jo Brendryen ◽  
Reidun F. Eldegard ◽  
Jan Mangerud ◽  
Sædis Ólafsdóttir ◽  
...  
Keyword(s):  
High Resolution ◽  
Polar Urals ◽  
Distinct Event ◽  
The Polar Urals

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.

The first evidence of UHP metamorphism in the Polar Urals (Russia)

2017 ◽  
Vol 476 (2) ◽  
pp. 1222-1225 ◽  
Author(s):  
A. Yu. Selyatitskii ◽  
K. V. Kulikova
Keyword(s):  
Uhp Metamorphism ◽  
Polar Urals ◽  
The Polar Urals

The vegetation of the class Scheuchzerio–Caricetea fuscae Tx. 1937 in the Yanganape mountain massif area (Eastern macroslope of the Polar Urals)

2021 ◽  
pp. 113-149
Author(s):  
E. D. Lapshina ◽  
I. V. Filippov ◽  
V. E. Fedosov ◽  
Yu. V. Skuchas ◽  
P. Lamkowski ◽  
...  
Keyword(s):  
Species Composition ◽  
Western Europe ◽  
Western Siberia ◽  
The Arctic ◽  
New Associations ◽  
Polar Urals ◽  
Mire Vegetation ◽  
The North ◽  
The Polar Urals

There are very few publications on the classification of mountain mire vegetation in Russia. Several associations in the Southern Siberia mountains (Lapshina, 1996; Lashchinsky, 2009) and the Khibiny Mountains (Koroleva, 2001) are described. Mire vegetation in the Southern Urals is relatively well studied and described in the traditions of the ecological-phytocenotic dominant classification (Ivchenko, 2013; Ivchenko, Znamenskiy, 2015) while the knowledge on that of the Northern and Sub-Polar Urals is extremely limited. There is no information about the mires in the Polar Urals. The paper presents the results of classification of the class Scheuchzerio–Caricetea fuscae of the Yanganape mountain massif (67.68°—67.75° N, 67.72°—68.00° E) and adjacent plains in the Eastern macroslope of the Polar Urals, within the southern tundra subzone. The study area is mountain massif of about 250 m a. s. l., composed of limestone outcrops, with a wavy flat (60–90 m a. s. l.) plain around (Fig. 1–2). The classification is based on 138 relevés made in July 27–August 8, 2017 (Fig. 3). Relevés of similar syntaxa, established in the north of the Western Europe and the East European tundras (Ruuhijärvi, 1960; Dierssen, 1982; Lavrinenko et al., 2016), were included in analysis. DCA and t-SNE (t-distributed stochastic neighbor embedding) methods were used for ordination of syntaxa in multidimensional space (Maaten, Hinton, 2008). The calculations were made using the machine learning package for Python-Scikit-learn. In total, 13 associations, 11 subassociations, 12 variants from 6 alliances and 3 orders of the class Scheuchzerio–Caricetea fuscae were identified on the relatively small (about 70 km2) area. Within the order Caricion davallianae, syntaxa of the alliance Caricion atrofuscae-saxatilis, comprising low sedge-hypnum communities on carbonate mineral and organomineral soils in the mountains of the Western Europe, were identified and described for the first time on the territory of Russia. Three new associations (Ditricho flexicauli—Caricetum redowskianae, Tomentypno nitentis–Equisetetum palustre, Tomentypno nitentis–Eriophoretum vaginati) were described on the the Yanganape mountain massif (Table 1), which significantly expands the area of the alliance to the East. Alliance’ communities have some similarities with syntaxa of zonal dwarf shrub-grass-moss tundra vegetation (Lavrinenko, Lavrinenko, 2018), but are generally well differed by the species composition and community structure (Table 5). The order Caricetalia fuscae in the Eastern macroslope of the Polar Urals is represented by 4 alliances. In addition to Drepanocladion exannulati and Sphagno-Caricion canescentis, listed in the “Classification of Vegetation of Europe” (Mucina et al., 2016), we include into order the alliance Caricion stantis — moderately rich sedge-moss fen vegetation of the Subarctic and tundra zones, and the alliance Stygio–Caricion limosae, containing extremely waterlogged meso-oligotrophic and slightly acidic to neutral low sedge fens. There are 4 associations within the alliance Caricion stantis, including new ass. Scorpidio cossonii–Caricetum rariflorae (Table 2). Taking into account statistically significant differences in the species composition of sedge-moss communities dominated by various moss species (Fig. 15, 5-6), ass. Scorpidio scorpioidis–Caricetum chordorrhizae was taken out from ass. Drepanoclado revolventis–Caricetum chordorrhizae Osvald 1925 ex Dierssen 1982 broadly understood in the Western Europe. Its nomenclature type is the only relevé of Carex chordorrhizae-Amblistegium scorpioides-Ass. (Osvald 1925: 37), which sufficient for the original diagnosis, because it contains list of species with abundance and both name-giving taxa (ICPN, 2b, 7). The communities of both associations were identified in the Eastern macroslope of the Polar Urals, where they are represented by new subassociations, which significantly expands the distribution area of these associations to the East. Recently validly described in the Eastern European tundras (Lavrinenko et al., 1916) ass. Scorpidio revolventis–Caricetum rariflorae is also known for the North of the Western Europe (Dierssen, 1982). Its difference from western syntaxa is the absence of many boreal species, which are not able to exist in the severe climate in the North of Western Siberia, as well as the great number of plant communities with the diagnostic species of the alliance Caricion atrofuscae-saxatilis due to rich mineral nutrition, associated with the carbonate soils and calcium-rich groundwaters in the study area. New associations are established in two allian­ces: Carici aquatilis–Warnstorfietum tundrae in Drepanocladion exannulati and Sphagno squarrosi–Caricetum chordorrhizae in Sphagno–Caricion canescentis (Table 3). The floristic features of the latter alliance, whose communities on the northern limit of their distribution have a certain similarity to the arctic sedge-moss mire vegetation of the alliance Caricion stantis, are discussed. Oligotrophic communities of the alliance Scheuch­zerion palustris, occuring in acidic habitats, are placed in the order Scheuchzerietalia palustris that is in agreement with new interpretation of this alliance in the paper by Mucina et al. (2016). Two associations (Carici rotundatae–Sphagnetum baltici, Sphagno compaci–Caricetum rotundatae) are assigned to this alliance. There are few relevés for both Scheuchzerion palustris and Stygio–Caricion limosae alliances in the study area that is why their classification is preliminary, and it will be considered in the near future for the whole North of the Western Siberia on a larger data set. The classification results are confirmed by DCA-ordination of selected syntaxa (Fig.15, Б). However, the differentiation of communities is more clearly demonstrated by the t-SNE method, which allows displaying multidimensional hyperspaces on the plane (Fig.15, А).

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