International Journal of Earth Sciences

, Volume 101, Issue 1, pp 239–252 | Cite as

Exact timing of granulite metamorphism in the Namche-Barwa, eastern Himalayan syntaxis: new constrains from SIMS U–Pb zircon age

  • Wen SuEmail author
  • Ming Zhang
  • Xiaohan Liu
  • Jinfu Lin
  • Kai Ye
  • Xin Liu
Short Note


Zircon grains separated from 2 granulites from the eastern Himalaya were investigated by Raman spectroscopy, cathodoluminescence imaging, and secondary ion mass spectrometry. These grains have a thin homogeneous rim and an oscillatory inner zone domain with or without a relict inherited core. Garnet, kyanite, and rutile inclusions were identified within only the rim domain of zircon grains, indicating that the rim had formed during peak granulite-facies metamorphism. U–Pb zircon data record three distinct age populations: 1,805 Ma (for the inherited core), ca. 500 Ma (oscillatory inner zone), as well as 24–25 Ma and ca. 18 Ma (for the metamorphic rim). These new precision ages suggest that the peak metamorphic age for the HP granulite is at ca. 24–25 Ma, and subsequent amphibolite-facies retrograde metamorphism occurred at ca. 18 Ma.


Granulite SIMS U–Pb zircon age High-pressure metamorphism Himalaya 



This study was funded by the State Key Project for Basic Research of China (2009CB825001) and the National Natural Science Foundation of China (40872059, 41021063, 40721003 and 40721062). We are indebted to Qiuli Li and Yu Liu for conducting the Cameca-1280 SIMS U–Pb analyses, Xin Yan for Cathodoluminescence (CL) images analysis. We are especially grateful to Prof. Guochun Zhao, Dr. Ben Goscombe and Dr. Quinn Cam for their constructive and helpful suggestions of this manuscript.


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Wen Su
    • 1
    Email author
  • Ming Zhang
    • 2
  • Xiaohan Liu
    • 3
  • Jinfu Lin
    • 4
  • Kai Ye
    • 1
  • Xin Liu
    • 1
  1. 1.State Key Laboratory of Lithospheric Evolution, Institute of Geology and GeophysicsChinese Academy of SciencesBeijingChina
  2. 2.Department of Earth SciencesUniversity of CambridgeCambridgeUK
  3. 3.Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijingChina
  4. 4.Engineering Research Center of Exploration for Hidden Non-Ferrous and Precious Metal Ore Deposits, Ministry of EducationGuilin University of TechnologyGuilinChina

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