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The early crust of the Volgo-Uralian segment of the East European Craton: Isotope-geochronological zirconology of metasedimentary rocks of the Bolshecheremshanskaya Formation and their Sm-Nd model ages

Bibikova, E. V.; Bogdanova, Svetlana LU ; Postnikov, A. V.; Fedotova, A. A.; Claesson, S.; Kirnozova, T. I.; Fugzan, M. M. and Popova, L. P. (2015) In Stratigraphy and Geological Correlation 23(1). p.1-23
Abstract
We present the results of isotope-geochronological study of metasedimentary rocks of the Bolshecheremshanskaya Formation of the Volgo-Uralian segment of the East European Craton carried out to identify their protoliths. 16 samples of high-alumina gneisses from well cores were studied using the Sm-Nd isotope method and T-Nd(DM) model ages. Accessory zircons were selected from rocks with the most ancient model ages (more 3.2 Ga) in three wells: Minnibaevskaya 20000, Novo-Elkhovskaya 20009, and Zai-Karatayskaya 12930 in South Tatarstan. The isotope U-Pb dating of 200 zircon grains was performed on a Cameca 1280 NORDSIM secondary ion mass spectrometer at the Natural History Museum (Stockholm, Sweden). The most applicable sites for analysis of... (More)
We present the results of isotope-geochronological study of metasedimentary rocks of the Bolshecheremshanskaya Formation of the Volgo-Uralian segment of the East European Craton carried out to identify their protoliths. 16 samples of high-alumina gneisses from well cores were studied using the Sm-Nd isotope method and T-Nd(DM) model ages. Accessory zircons were selected from rocks with the most ancient model ages (more 3.2 Ga) in three wells: Minnibaevskaya 20000, Novo-Elkhovskaya 20009, and Zai-Karatayskaya 12930 in South Tatarstan. The isotope U-Pb dating of 200 zircon grains was performed on a Cameca 1280 NORDSIM secondary ion mass spectrometer at the Natural History Museum (Stockholm, Sweden). The most applicable sites for analysis of zircon crystals were pre-selected based on cathodoluminescence images. The analytical results demonstrate the diversity of zircon groups in age from 3.8 to 2.6 Ga and together with geochemical features of metasedimentary rocks of the Bolshecheremshanskaya Formation suggest the heterogeneous composition and age of provenance areas under denudation. Occurrence of Eoarchean and Paleoarchean zircons in the clastic material of the protolith of the Bolshecheremshanskaya gneisses indicates the existence of Early Archean crustal terrains in Volgo-Uralia. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Volgo-Uralia, metasedimentary rocks, model age, clastic zircon, U-Pb, isotope dating, ion microprobe
in
Stratigraphy and Geological Correlation
volume
23
issue
1
pages
1 - 23
publisher
Interperiodica
external identifiers
  • wos:000349028700001
  • scopus:84961290633
ISSN
0869-5938
DOI
10.1134/S0869593815010037
language
English
LU publication?
yes
id
34763dcd-d614-4e9f-89be-e628b3ff52d8 (old id 5194663)
date added to LUP
2015-03-27 11:55:36
date last changed
2017-01-01 05:55:58
@article{34763dcd-d614-4e9f-89be-e628b3ff52d8,
  abstract     = {We present the results of isotope-geochronological study of metasedimentary rocks of the Bolshecheremshanskaya Formation of the Volgo-Uralian segment of the East European Craton carried out to identify their protoliths. 16 samples of high-alumina gneisses from well cores were studied using the Sm-Nd isotope method and T-Nd(DM) model ages. Accessory zircons were selected from rocks with the most ancient model ages (more 3.2 Ga) in three wells: Minnibaevskaya 20000, Novo-Elkhovskaya 20009, and Zai-Karatayskaya 12930 in South Tatarstan. The isotope U-Pb dating of 200 zircon grains was performed on a Cameca 1280 NORDSIM secondary ion mass spectrometer at the Natural History Museum (Stockholm, Sweden). The most applicable sites for analysis of zircon crystals were pre-selected based on cathodoluminescence images. The analytical results demonstrate the diversity of zircon groups in age from 3.8 to 2.6 Ga and together with geochemical features of metasedimentary rocks of the Bolshecheremshanskaya Formation suggest the heterogeneous composition and age of provenance areas under denudation. Occurrence of Eoarchean and Paleoarchean zircons in the clastic material of the protolith of the Bolshecheremshanskaya gneisses indicates the existence of Early Archean crustal terrains in Volgo-Uralia.},
  author       = {Bibikova, E. V. and Bogdanova, Svetlana and Postnikov, A. V. and Fedotova, A. A. and Claesson, S. and Kirnozova, T. I. and Fugzan, M. M. and Popova, L. P.},
  issn         = {0869-5938},
  keyword      = {Volgo-Uralia,metasedimentary rocks,model age,clastic zircon,U-Pb,isotope dating,ion microprobe},
  language     = {eng},
  number       = {1},
  pages        = {1--23},
  publisher    = {Interperiodica},
  series       = {Stratigraphy and Geological Correlation},
  title        = {The early crust of the Volgo-Uralian segment of the East European Craton: Isotope-geochronological zirconology of metasedimentary rocks of the Bolshecheremshanskaya Formation and their Sm-Nd model ages},
  url          = {http://dx.doi.org/10.1134/S0869593815010037},
  volume       = {23},
  year         = {2015},
}