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

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Chinese Science Bulletin

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.

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Authors and Affiliations

  1. Institute of Geology, Chinese Academy of Geological Sciences, 100037, Beijing, China

    Zeming Zhang & Jianxin Zhang

  2. Analyses and Test Center, China University of Geosciences (Wuhan), 430074, Wuhan, China

    Yong Yang

Authors
  1. Zeming Zhang
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  2. Yong Yang
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  3. Jianxin Zhang
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Zhang, Z., Yang, Y. & Zhang, J. The compositional zoning of garnet in eclogite from western segment of Altyn Tagh, northwestern China and its dynamic significance. Chin. Sci. Bull. 45, 79–83 (2000). https://doi.org/10.1007/BF02884909

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  • DOI: https://doi.org/10.1007/BF02884909

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