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Abstract <p>Felsic xenoliths from the Nyurbinskaya pipe in the Anabar province are represented by Grt-granulites and Grt-gneisses. A consideration of the metamorphic sequence and U–Pb zircon dating revealed that the crustal section contains rocks with different thermal histories. Lower crustal rocks were heated to 900°C 1.88–1.84 Byr ago. Upper-middle crustal rocks were not affected by post-collisional events. We believe this section is the juxtaposition of tectonic slices consisting of metamorphic complexes of different ages.</p>

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Structure and Metamorphic History of the Lower and Middle Crust of the Anabar Province of the Siberian Craton Based on Data for Xenoliths from the Nurbinskaya Diatreme

  • 期刊论文

  • 发表日期：

    2026年7月22日

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  • M. Yu. Koreshkova,
  • H. Downes,
  • E. Yu. Akimova,
  • M. V. Stifeeva,
  • I. Peytcheva,
  • D. Dimitrova,
  • L. Macheva,
  • A. N. Larionov,
  • S. A. Sergeev,
  • G. A. Lisovski,
  • O. G. Safonov

摘要

Abstract

Felsic xenoliths from the Nyurbinskaya pipe in the Anabar province are represented by Grt-granulites and Grt-gneisses. A consideration of the metamorphic sequence and U–Pb zircon dating revealed that the crustal section contains rocks with different thermal histories. Lower crustal rocks were heated to 900°C 1.88–1.84 Byr ago. Upper-middle crustal rocks were not affected by post-collisional events. We believe this section is the juxtaposition of tectonic slices consisting of metamorphic complexes of different ages.