Neoproterozoic metavolcanosedimentary rocks of the Bozdak Group in southern Ulutau (Central Kazakhstan): isotope-geochemical and geochronological data

N. V. Dmitrieva, E. F. Letnikova, S. I. Shkol'nik, I. A. Vishnevskaya, N. A. Kanygina, M. S. Nikolaeva, I. V. Sharf

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Abstract

We consider geochemistry of Neoproterozoic metavolcanosedimentary rocks of the Bozdak Group in southern Ulutau (Central Kazakhstan) and present the first results of U-Pb LA-ICP-MS dating of clastic zircons and Sm-Nd isotope data. Isotope-geochemical and geochronological studies have shown that the Bozdak Group rocks resulted from the destruction of igneous and metamorphic complexes mostly of Neoproterozoic age with the participation of Archean and Paleoproterozoic rocks. The lower boundary of sedimentation is dated at 800 Ma. The obtained isotope-geochemical data on the Bozdak Group basaltoids suggest their formation on thick continental crust with the participation of subduction fluid.

Original languageEnglish
Pages (from-to)1551-1569
Number of pages19
JournalRussian Geology and Geophysics
Volume57
Issue number11
DOIs
Publication statusPublished - 1 Nov 2016

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Keywords

  • Central Kazakhstan
  • LA-ICP-MS zircon dating
  • Late Precambrian
  • Sm-Nd isotopes
  • volcanosedimentary rocks

ASJC Scopus subject areas

  • Geophysics
  • Geology

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