Terrains of the main geodynamical types in the structures of Ural-Timan areal and the Eurasia North-Eastern segment

Subject of study. Different points of view on the concept of structures of the terrain type and their role in the addition of orogenic belts are considered. Materials and methods. We used our own research and analysis of the latest publications about the Ural-Timan region and the Pacific belt, on th...

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Main Authors: Viktor A. Koroteev, Viktor M. Necheukhin, Artur A. Krasnobaev, Elena N. Volchek
Format: Article
Language:English
Published: A.N. Zavaritsky Institute of Geology and Geochemistry 2018-12-01
Series:Литосфера
Subjects:
Online Access:https://www.lithosphere.ru/jour/article/view/254
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spelling doaj-0c57366c77404ff89414ec01a34059212020-11-25T03:41:22ZengA.N. Zavaritsky Institute of Geology and GeochemistryЛитосфера1681-90042500-302X2018-12-010677979610.24930/1681-9004-2018-18-6-779-796254Terrains of the main geodynamical types in the structures of Ural-Timan areal and the Eurasia North-Eastern segmentViktor A. Koroteev0Viktor M. Necheukhin1Artur A. Krasnobaev2Elena N. Volchek3A.N. Zavaritsky Institute of Geology and Geochemistry, Urals Branch of RASA.N. Zavaritsky Institute of Geology and Geochemistry, Urals Branch of RASA.N. Zavaritsky Institute of Geology and Geochemistry, Urals Branch of RASA.N. Zavaritsky Institute of Geology and Geochemistry, Urals Branch of RASSubject of study. Different points of view on the concept of structures of the terrain type and their role in the addition of orogenic belts are considered. Materials and methods. We used our own research and analysis of the latest publications about the Ural-Timan region and the Pacific belt, on the territory of the Northeast segment of Eurasia, as well as currently known isotope radiometric data. It was used also the result of geophysical seismotectonic and paleomagnetic explorations. Results. It has been established that in the composition of the Ural-Timan structural area, along with the Proterozoic and Paleozoic associations of the orogenic belts and the Riphean sedimentary series of protrusions of the Russian Plate, structural formations that correspond to the terrain of the continental crust take part. They are the most characteristic for the Ural orogenic belt, which belongs to the group of epiokean-type belts, associated with the transformation of ocean basins with the active participation of accretion and collision processes. The parametric features of these terrains include the ancient age characteristics of terrain rocks, their position in the belt structure, as well as the presence of relics of subhorizontal layered structural elements. The discordant blocks of migmatites, gneisses and other metamorphic rocks of Precambrian age, which make up the terrains, was the basis for the introduction of the term “terranes of the ancient continental crust”. By connection with the source, exotic and endemic, and simple and complex terrains are distinguished by structure. The geodynamics of including terrains of the ancient continental crust into the structure of orogenic belts is associated with horizontal movements of fragments of the ancient lithosphere in oceanic paleobasins to the periphery of the Russian Plate and their localization in belt structures. The formation of these terrains in the structures of the orogenic belts is completed by the formation of the intra-terrain massifs of granitoids and belts of volcanic-intrusive series. Supporters of a different methodology, dominant among researchers of the Pacific Belt of the Northeast Segment of Eurasia, refer to terrains all the structural elements that perform orogenic belts, because they believe that they have undergone horizontal movements and are in allochtonous occurrence. Conclusions. It has been established that in different geological provinces the term terrain has its own characteristics. This was the basis for the selection of two geodynamic types of terrains.https://www.lithosphere.ru/jour/article/view/254terranesterranes of the ancient continental crustsimple and complex terranesexotic and endemic terranesstructural ensembles
collection DOAJ
language English
format Article
sources DOAJ
author Viktor A. Koroteev
Viktor M. Necheukhin
Artur A. Krasnobaev
Elena N. Volchek
spellingShingle Viktor A. Koroteev
Viktor M. Necheukhin
Artur A. Krasnobaev
Elena N. Volchek
Terrains of the main geodynamical types in the structures of Ural-Timan areal and the Eurasia North-Eastern segment
Литосфера
terranes
terranes of the ancient continental crust
simple and complex terranes
exotic and endemic terranes
structural ensembles
author_facet Viktor A. Koroteev
Viktor M. Necheukhin
Artur A. Krasnobaev
Elena N. Volchek
author_sort Viktor A. Koroteev
title Terrains of the main geodynamical types in the structures of Ural-Timan areal and the Eurasia North-Eastern segment
title_short Terrains of the main geodynamical types in the structures of Ural-Timan areal and the Eurasia North-Eastern segment
title_full Terrains of the main geodynamical types in the structures of Ural-Timan areal and the Eurasia North-Eastern segment
title_fullStr Terrains of the main geodynamical types in the structures of Ural-Timan areal and the Eurasia North-Eastern segment
title_full_unstemmed Terrains of the main geodynamical types in the structures of Ural-Timan areal and the Eurasia North-Eastern segment
title_sort terrains of the main geodynamical types in the structures of ural-timan areal and the eurasia north-eastern segment
publisher A.N. Zavaritsky Institute of Geology and Geochemistry
series Литосфера
issn 1681-9004
2500-302X
publishDate 2018-12-01
description Subject of study. Different points of view on the concept of structures of the terrain type and their role in the addition of orogenic belts are considered. Materials and methods. We used our own research and analysis of the latest publications about the Ural-Timan region and the Pacific belt, on the territory of the Northeast segment of Eurasia, as well as currently known isotope radiometric data. It was used also the result of geophysical seismotectonic and paleomagnetic explorations. Results. It has been established that in the composition of the Ural-Timan structural area, along with the Proterozoic and Paleozoic associations of the orogenic belts and the Riphean sedimentary series of protrusions of the Russian Plate, structural formations that correspond to the terrain of the continental crust take part. They are the most characteristic for the Ural orogenic belt, which belongs to the group of epiokean-type belts, associated with the transformation of ocean basins with the active participation of accretion and collision processes. The parametric features of these terrains include the ancient age characteristics of terrain rocks, their position in the belt structure, as well as the presence of relics of subhorizontal layered structural elements. The discordant blocks of migmatites, gneisses and other metamorphic rocks of Precambrian age, which make up the terrains, was the basis for the introduction of the term “terranes of the ancient continental crust”. By connection with the source, exotic and endemic, and simple and complex terrains are distinguished by structure. The geodynamics of including terrains of the ancient continental crust into the structure of orogenic belts is associated with horizontal movements of fragments of the ancient lithosphere in oceanic paleobasins to the periphery of the Russian Plate and their localization in belt structures. The formation of these terrains in the structures of the orogenic belts is completed by the formation of the intra-terrain massifs of granitoids and belts of volcanic-intrusive series. Supporters of a different methodology, dominant among researchers of the Pacific Belt of the Northeast Segment of Eurasia, refer to terrains all the structural elements that perform orogenic belts, because they believe that they have undergone horizontal movements and are in allochtonous occurrence. Conclusions. It has been established that in different geological provinces the term terrain has its own characteristics. This was the basis for the selection of two geodynamic types of terrains.
topic terranes
terranes of the ancient continental crust
simple and complex terranes
exotic and endemic terranes
structural ensembles
url https://www.lithosphere.ru/jour/article/view/254
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