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Doklady Earth Sciences

, Volume 472, Issue 2, pp 134–137 | Cite as

Geochemical and Lu/Hf isotopic (LA–ICP–MS) systematics of detrital zircons from the Upper Ordovician sandstones of the Bashkir Uplift (Southern Urals)

  • T. V. Romanyuk
  • N. B. Kuznetsov
  • E. A. Belousova
  • K. E. Degtyarev
  • A. V. Maslov
  • V. M. Gorozhanin
  • E. N. Gorozhanina
  • E. S. Pyzhova
Geology

Abstract

Analyses of trace elements and Lu/Hf isotopes have been carried out in already U–Pb dated detrital zircons from the Upper Ordovician sandstones of the southern part of the Bashkir Uplift. The concentrations of trace elements in the zircons suggest that they were derived from rocks of intermediate (62%), basic (24%), and felsic (9%) compositions as well as alkaline rocks (2%). The Lu/Hf systematics of the zircons demonstrated a wide variation of both εHf (from +9.5 to–8.7) and model ages of the parental rocks (1.60 Ga < T DM C < 3.28 Ga). Comparison of the isotopic–geochemical characteristics of the detrital zircons from different levels of the Riphean–Paleozoic sequence of the Bashkir Uplift against those from the Early Cambrian Brusov Formation of the Mezen Basin and Early Neoproterozoic Dzhezhim sandstones of Timan Ridge suggests that at the end of the Late Precambrian near the Uralian margin of Baltica a large block of Late Mesoproterozoic–Early Neoproterozoic crust existed, comprising a significant proportion of melanocratic rocks.

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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • T. V. Romanyuk
    • 1
    • 2
    • 3
  • N. B. Kuznetsov
    • 1
    • 2
    • 3
    • 4
  • E. A. Belousova
    • 3
  • K. E. Degtyarev
    • 4
  • A. V. Maslov
    • 5
  • V. M. Gorozhanin
    • 6
  • E. N. Gorozhanina
    • 6
  • E. S. Pyzhova
    • 7
  1. 1.Schmidt Joint Institute of Physics of the EarthRussian Academy of SciencesMoscowRussia
  2. 2.Gubkin Russian State University of Oil and GasMoscowRussia
  3. 3.The ARC National Key Centre for Geochemical Evolution and Metallogeny of Continents (GEMOC)Macquarie UniversitySydneyAustralia
  4. 4.Geological InstituteRussian Academy of SciencesMoscowRussia
  5. 5.Zavaritskii Institute of Geology and Geochemistry, Ural BranchRussian Academy of SciencesYekaterinburgRussia
  6. 6.Institute of Geology, Ufa Scientific CenterRussian Academy of SciencesUfaRussia
  7. 7.Peoples’ Friendship University of RussiaMoscowRussia

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