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Sarmatia-Volgo-Uralia junction zone: Isotopic-geochronologic characteristic of supracrustal rocks and granitoids

Bibikova, E. V.; Bogdanova, Svetlana LU ; Postnikov, A. V.; Popova, L. P.; Kirnozova, T. I.; Fugzan, M. M. and Glushchenko, V. V. (2009) In Stratigraphy and Geological Correlation 17(6). p.561-573
Abstract
The geochronologic (U-Pb isotopic system of zircons) and isotopic-geochemical (Sm-Nd isotopic system of the bulk rock) studies were performed along the profile extending from the eastern Sarmatia (in the west) to the Middle Volga megablock of Volgo-Uralia (in the east), i.e., across the entire junction zone for dating the integration of Sarmatia and Volgo-Uralia, representing two segments of the East European Craton. It is established that the examined rocks are characterized by the Paleoproterozoic Nd isotopic model age, which varies from 2.1 and 2.4 Ga, except for some samples indicating a similar age of the crust through the entire Sarmatia-Volgo-Uralia junction zone. The highly metamorphosed complexes of the granulite and amphibolite... (More)
The geochronologic (U-Pb isotopic system of zircons) and isotopic-geochemical (Sm-Nd isotopic system of the bulk rock) studies were performed along the profile extending from the eastern Sarmatia (in the west) to the Middle Volga megablock of Volgo-Uralia (in the east), i.e., across the entire junction zone for dating the integration of Sarmatia and Volgo-Uralia, representing two segments of the East European Craton. It is established that the examined rocks are characterized by the Paleoproterozoic Nd isotopic model age, which varies from 2.1 and 2.4 Ga, except for some samples indicating a similar age of the crust through the entire Sarmatia-Volgo-Uralia junction zone. The highly metamorphosed complexes of the granulite and amphibolite facies constituting the southwestern margin of Volgo-Uralia are Paleoproterozoic, not Archean, in age, contrary to previous views. Two Early Paleoproterozoic lithotectonic complexes are defined in Volgo-Uralia: South Volga metasedimentary and Tersa metasedimentary-volcanogenic. The obtained data confirm the asynchronous integration of individual segments into the East European Craton: the integration of Sarmatia and Volgo-Uralia approximately 2100-2000 Ma ago was followed by the conjunction of this newly-formed continent with Fennoscandia ca. 1800 Ma ago. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Sm-Nd model age, isotopic age, junction zone, Sarmatia, Volgo-Uralia, East European Craton
in
Stratigraphy and Geological Correlation
volume
17
issue
6
pages
561 - 573
publisher
Interperiodica
external identifiers
  • wos:000272870000001
  • scopus:74549156328
ISSN
0869-5938
DOI
10.1134/S086959380906001X
language
English
LU publication?
yes
id
1c024c72-2e71-4582-8dea-f842bd970183 (old id 1531837)
date added to LUP
2010-01-29 11:45:42
date last changed
2017-09-17 06:08:01
@article{1c024c72-2e71-4582-8dea-f842bd970183,
  abstract     = {The geochronologic (U-Pb isotopic system of zircons) and isotopic-geochemical (Sm-Nd isotopic system of the bulk rock) studies were performed along the profile extending from the eastern Sarmatia (in the west) to the Middle Volga megablock of Volgo-Uralia (in the east), i.e., across the entire junction zone for dating the integration of Sarmatia and Volgo-Uralia, representing two segments of the East European Craton. It is established that the examined rocks are characterized by the Paleoproterozoic Nd isotopic model age, which varies from 2.1 and 2.4 Ga, except for some samples indicating a similar age of the crust through the entire Sarmatia-Volgo-Uralia junction zone. The highly metamorphosed complexes of the granulite and amphibolite facies constituting the southwestern margin of Volgo-Uralia are Paleoproterozoic, not Archean, in age, contrary to previous views. Two Early Paleoproterozoic lithotectonic complexes are defined in Volgo-Uralia: South Volga metasedimentary and Tersa metasedimentary-volcanogenic. The obtained data confirm the asynchronous integration of individual segments into the East European Craton: the integration of Sarmatia and Volgo-Uralia approximately 2100-2000 Ma ago was followed by the conjunction of this newly-formed continent with Fennoscandia ca. 1800 Ma ago.},
  author       = {Bibikova, E. V. and Bogdanova, Svetlana and Postnikov, A. V. and Popova, L. P. and Kirnozova, T. I. and Fugzan, M. M. and Glushchenko, V. V.},
  issn         = {0869-5938},
  keyword      = {Sm-Nd model age,isotopic age,junction zone,Sarmatia,Volgo-Uralia,East European Craton},
  language     = {eng},
  number       = {6},
  pages        = {561--573},
  publisher    = {Interperiodica},
  series       = {Stratigraphy and Geological Correlation},
  title        = {Sarmatia-Volgo-Uralia junction zone: Isotopic-geochronologic characteristic of supracrustal rocks and granitoids},
  url          = {http://dx.doi.org/10.1134/S086959380906001X},
  volume       = {17},
  year         = {2009},
}