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Abstract <p>The results of U‒Pb geochronological studies of calcium garnet from nepheline syenites of the Yakokutsky volcano-plutonic complex (the Aldan Shield) are presented. The garnet age is 131 ± 1 Ma and is consistent with the previously obtained age estimates for garnet from kalsilitic ijolites and pyroxene-microcline pegmatites of the Murunsky massif. The results of these studies demonstrate the potential of garnet for reference age estimates of high-K alkaline rocks.</p>

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U–Pb (ID TIMS) Age of Garnet from Nepheline Syenites of the Yakokutsky Volcano-Plutonic Complex: A New Reference Estimate of Age for Mesozoic Alkaline Magmatism Event of the Aldan Shield

  • 期刊论文

  • 发表日期：

    2026年2月18日

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  • E. B. Salnikova,
  • M. V. Stifeeva,
  • A. B. Kotov,
  • N. V. Vladykin,
  • I. A. Sotnikova,
  • N. V. Alymova

摘要

Abstract

The results of U‒Pb geochronological studies of calcium garnet from nepheline syenites of the Yakokutsky volcano-plutonic complex (the Aldan Shield) are presented. The garnet age is 131 ± 1 Ma and is consistent with the previously obtained age estimates for garnet from kalsilitic ijolites and pyroxene-microcline pegmatites of the Murunsky massif. The results of these studies demonstrate the potential of garnet for reference age estimates of high-K alkaline rocks.