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LITHOSPHERIC ARCHITECTURE OF EUROPEAN CRATON

Г. Н. Иванченко

First published: 2018-06-20https://doi.org/10.5593/sgem2018/1.1/s01.027View metrics

Abstract

The lithospheric mantle of the central part of the East European Craton has not been studied in detail. The main goal of the research is to develop a model of the deep structure of this region. Recently new vertical velocity sections were constructed to a depth of 300 km, obtained by the receiver function method, along the sublatitudinal profile Obninsk-Nizhny Novgorod. The position of the main boundary of the crust-mantle is reconsidered from the velocity sections. Velocity differentiation is found within the upper mantle, which is associated with a change in geophysical and geochemical properties. Suggested model is aimed at analyzing the relationship between the structure of the lithospheric mantle and the structures of the earth's crust, which must be carried out at different hierarchical levels. Structurally, the region in question is represented by Archean microcontinents - the Volga-Ural and Sarmatia and the connecting zone of the Proterozoic folding. Under the earth's crust, the stable areas of the sub-continental lithospheric mantle - the domains up to 100 km in size, which are characterized by definite geological, geochemical and geophysical properties - stand out in the upper mantle. Under Archean microcontinents forming East European Craton, agglomeration of domains forming pristine archean is traced. The position of the lower boundary of the domains is determined by the age of their formation. Under Archean microcontinents - Volga-Ural, Sarmatia, the bottom of the sole is presumably traced at depths of up to 400 km, under Proterozoic folding - up to 250 km. In some areas, melting of the lower part of the domains and along its boundaries is possible, controlled in some cases by the presence of large fault zones.

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Publication details

Title
LITHOSPHERIC ARCHITECTURE OF EUROPEAN CRATON
Authors
Г. Н. Иванченко
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Science and Technologies in Geology, Exploration and Mining
Publisher
STEF92 Technology
Year
2018
Pages
205-212
SWS Citekey
Ivanchenko20181205212
ISSN
1314-2704
ISBN
978-619-7408-35-5
Language
en
Publication type
Conference Paper
Keywords
lithospheric mantleEast European Cratonreceiver function methodvelocity sectionArchean microcontinent
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