Late paleozoic–early mesozoic granite magmatism on the arctic margin of the siberian craton during the kara-siberia oblique collision and plume events

Valery A. Vernikovsky, Antonina Vernikovskaya, Vasilij Proskurnin, Nikolay Matushkin, Maria Proskurnina, Pavel Kadilnikov, Alexander Larionov, Alexey Travin

Research output: Contribution to journalArticlepeer-review

Abstract

We present new structural, petrographic, geochemical and geochronological data for the late Paleozoic–early Mesozoic granites and associated igneous rocks of the Taimyr Peninsula. It is demonstrated that large volumes of granites were formed due to the oblique collision of the Kara microcontinent and the Siberian paleocontinent. Based on U-Th-Pb isotope data for zircons, we identify syncollisional (315–282 Ma) and postcollisional (264–248 Ma) varieties, which differ not only in age but also in petrochemical and geochemical features. It is also shown that as the postcollisional magmatism was coming to an end, Siberian plume magmatism manifested in the Kara orogen and was represented by basalts and dolerites of the trap formation (251–249 Ma), but also by differentiated and individual intrusions of monzonites, quartz monzonites and syenites (Early–Middle Triassic) with a mixed crustal-mantle source. We present a geodynamic model for the formation of the Kara orogen and discuss the relationship between collisional and trap magmatism.

Original languageEnglish
Article number571
Pages (from-to)1-39
Number of pages40
JournalMinerals
Volume10
Issue number6
DOIs
Publication statusPublished - 1 Jun 2020

Keywords

  • Carboniferous
  • Geochemistry
  • Granites
  • Kara microcontinent
  • Kara orogen
  • Oblique collision
  • Permian
  • Petrography
  • Siberian Craton
  • Siberian plume
  • Triassic
  • U-Th-Pb andAr/Ar geochronology
  • RAPID ERUPTION
  • SEVERNAYA-ZEMLYA-ARCHIPELAGO
  • RODINIA
  • TRACE-ELEMENT
  • granites
  • petrography
  • PALEOMAGNETIC DATA
  • TECTONIC EVOLUTION
  • NOVAYA-ZEMLYA
  • geochemistry
  • NORTHERN RUSSIA
  • carboniferous
  • Ar-39 geochronology
  • CENTRAL-TAIMYR
  • REGION
  • oblique collision
  • U-Th-Pb and(40)Ar

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