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Chinese Science Bulletin

, Volume 45, Issue 1, pp 79–83 | Cite as

The compositional zoning of garnet in eclogite from western segment of Altyn Tagh, northwestern China and its dynamic significance

  • Zeming Zhang
  • Yong Yang
  • Jianxin Zhang
Notes

Abstract

The eclogites from the Altyn Tagh, northwestern China have been subjected to mediumtemperature and high-pressure metamorphism, and then overprinted by the amphibolite to granulite facies retrograde metamorphism. A complex compositional zoning was well preserved in the garnet porphyroblast formed during the metamorphism of eclogite facies. This zoning recordedP-T path of multistage metamorphism, and an early retrogressive process with features of decreasing pressure and increasing temperature. This evidences a short residence time for the eclogite at peak metamorphism and early retrogression, and thus rapid tectonic uplift history.

Keywords

eclogite garnet growth zoning P-T path exhumation rate Altyn Tagh 

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Copyright information

© Science in China Press 2000

Authors and Affiliations

  • Zeming Zhang
    • 1
  • Yong Yang
    • 2
  • Jianxin Zhang
    • 1
  1. 1.Institute of GeologyChinese Academy of Geological SciencesBeijingChina
  2. 2.Analyses and Test CenterChina University of Geosciences (Wuhan)WuhanChina

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