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Abstract <p>The results of U–Pb (ID-TIMS) geochronological studies of zircon from biotite–hypersthene plagiogneiss (metadacite) of the Kurumkan Formation, Aldan Shield, are presented. The obtained crystallization age of the biotite–hypersthene plagiogneiss protolith is 2395 ± 6 Ma. Metasedimentary rocks of the Kurumkan Formation, some of which are characterized by Nd model ages <i>t</i><sub>Nd</sub>(DM) = 2.3–2.2 Ga, are clearly younger than metavolcanic rocks. This indicates that the formation includes rocks of different ages, whose origin is associated with distinct stages of the Early Proterozoic geological evolution of the Aldan Shield.</p>

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Age of Metavolcanic Rocks of the Kurumkan Formation of the Aldan Shield

  • 期刊论文

  • 发表日期：

    2026年4月23日

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  • S. D. Velikoslavinskii,
  • V. V. Bortnikov,
  • E. B. Sal’nikova,
  • A. B. Kotov,
  • E. V. Tolmacheva,
  • V. P. Kovach,
  • Yu. V. Plotkina,
  • T. M. Skovitina,
  • N. Yu. Zagornaya

摘要

Abstract

The results of U–Pb (ID-TIMS) geochronological studies of zircon from biotite–hypersthene plagiogneiss (metadacite) of the Kurumkan Formation, Aldan Shield, are presented. The obtained crystallization age of the biotite–hypersthene plagiogneiss protolith is 2395 ± 6 Ma. Metasedimentary rocks of the Kurumkan Formation, some of which are characterized by Nd model ages tNd(DM) = 2.3–2.2 Ga, are clearly younger than metavolcanic rocks. This indicates that the formation includes rocks of different ages, whose origin is associated with distinct stages of the Early Proterozoic geological evolution of the Aldan Shield.