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Doklady Earth Sciences

, Volume 464, Issue 2, pp 1039–1043 | Cite as

Geochemical features and age of baddeleyite from carbonatites of the Proterozoic Tiksheozero alkaline–ultramafic pluton, North Karelia

  • N. V. RodionovEmail author
  • B. V. Belyatsky
  • A. V. Antonov
  • S. G. Simakin
  • S. A. Sergeev
Geochemistry
  • 59 Downloads

Abstract

On the basis of the local composition, baddeleyite grains that were less altered due to interaction with an alkaline melt and corresponded to the primary stage of crystallization of the intrusion were selected from the carbonatite intrusion of the Proterozoic polyphase Tiksheozero alkaline–ultramafic complex. The single age of carbonatite crystallization characterized of the bulk volume of the intrusion was estimated for the first time on the basis of 40 local U–Th–Pb (SHRIMP II) analyses of these grains. The overall concordant age of baddeleyite is 1994.8 ± 9.4 Ma, and the lower age limit of the polyphase complex formation is less than 1998.4 ± 3.5 Ma.

Keywords

DOKLADY Earth Science Nepheline Syenite Baddeleyite Calcite Carbonatites Carbon Atites 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2015

Authors and Affiliations

  • N. V. Rodionov
    • 1
    Email author
  • B. V. Belyatsky
    • 1
  • A. V. Antonov
    • 1
  • S. G. Simakin
    • 2
  • S. A. Sergeev
    • 1
  1. 1.Karpinskii Russian Geological Research InstituteSt. PetersburgRussia
  2. 2.Yaroslavl Branch of the Institute of Physics and TechnologyRussian Academy of SciencesYaroslavlRussia

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