P-T path of metamorphism and U-Pb monazite and zircon age of the Kitoy terrane: Implication for Neoarchean collision in SW Siberian Craton

Vasiliy P. Sukhorukov, Valentina B. Savel'eva, Yingde Jiang, Zhiyong Li

Research output: Contribution to journalArticlepeer-review

Abstract

The first data on P-T metamorphic conditions coupled with U-Pb monazite and zircon age obtained for the Neoarchean Kitoy granulite-gneiss terrane (SW Siberian Craton). Alumina gneisses of the Kitoy terrane indicate two-staged metamorphic evolution. The first stage of regional metamorphism (M1) occurred at high-amphibolite facies conditions at T ​= ​780–800 ​°C and P ​= ​8–9 ​kbar. The second stage (M2) belongs to MT-HT/LP type of metamorphism with the wide temperature interval 600–750 ​°C and pressure 2–4 ​kbar. Two age peaks were established on the basis of U-Pb monazite and zircon dating in garnet-anthophyllite gneisses. Both of them correspond to the Neoarchean age: the age of M1 falls into the interval of ca. 2489–2496 ​Ma, the age of M2 – ca. 2446–2456 ​Ma. The high-temperature metamorphism of the Kitoy block and nearly coeval granitoid magmatism can be an evidence for the Neoarchean collision in SW Siberian craton.

Original languageEnglish
Pages (from-to)1915-1934
Number of pages20
JournalGeoscience Frontiers
Volume11
Issue number6
DOIs
Publication statusPublished - 1 Nov 2020

Keywords

  • Kitoy terrane
  • Metamorphism
  • Neoarchean
  • P-T path
  • Siberian craton
  • ANGARA-KAN BLOCK
  • BIOTITE
  • MINERALS
  • ROCKS
  • GARNET
  • THERMODYNAMIC MODEL
  • TRACE-ELEMENTS
  • BLOCK SHARYZHALGAI-UPLIFT
  • GEOCHEMISTRY
  • SILLIMANITE SCHIST DEPOSIT

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