Doklady Earth Sciences

, Volume 457, Issue 1, pp 824–830 | Cite as

Mesoarchean mafic dykes of the Belomorian eclogite province (Gridino Village Area, Russia)

  • K. A. DokukinaEmail author
  • T. V. Kaulina
  • A. N. Konilov
  • L. M. Natapov
  • E. A. Belousova
  • K. V. Van
  • S. G. Simakin
  • E. N. Lepekhina


Archean processes of eclogitization in the Gridino metamorphic association (the Belomorian eclogite province) developed in mafic dykes, boudins, and acidic rocks of the Archean continental crusts. To determine the U-Pb age of the intrusion of the latest dykes, the geochronological samples were taken from the dyke of ferriferious metagabbro that cross-cuts the dyke of eclogitzed and granulitized olivine gabbronorite. The igneous zircons were dated by the SHRIMP II technique. The zircons showed a concordia age of 2846 ± 7 Ma, which is considered as the time of intrusion of a mafic melt. The younger low-thorium zircon rims of 2.78–2.81 Ga age around the igneous cores are typical formations that appeared under metamorphic conditions in equilibrium with a migmatite melt, and may characterize the time of formation of the granite leucosome under metamorphism, probably of eclogite facies.


Zircon DOKLADY Earth Science Mafic Dyke Igneous Zircon Dyke Rock 
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Copyright information

© Pleiades Publishing, Ltd. 2014

Authors and Affiliations

  • K. A. Dokukina
    • 1
    • 2
    Email author
  • T. V. Kaulina
    • 3
  • A. N. Konilov
    • 1
    • 4
  • L. M. Natapov
    • 5
  • E. A. Belousova
    • 5
  • K. V. Van
    • 4
  • S. G. Simakin
    • 6
  • E. N. Lepekhina
    • 7
  1. 1.Geological InstituteRussian Academy of SciencesMoscowRussia
  2. 2.Moscow State UniversityMoscowRussia
  3. 3.Institute of Geology, Kola Science CenterRussian Academy of SciencesApatity, Murmansk oblastRussia
  4. 4.Institute of Experimental MineralogyRussian Academy of SciencesChernogolovkaRussia
  5. 5.ARC National Key CenterMacquarie UniversitySydneyAustralia
  6. 6.Yaroslavl Branch, Institute of Physics and TechnologyRussian Academy of SciencesYaroslavlRussia
  7. 7.Karpinskii Russian Geological Research InstituteRussian Academy of SciencesSt. PetersburgRussia

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