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Partial melting of deeply subducted eclogite from the Sulu orogen in China

Author

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  • Lu Wang

    (State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences Wuhan
    Center for Global Tectonics, China University of Geosciences Wuhan)

  • Timothy M. Kusky

    (State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences Wuhan
    Center for Global Tectonics, China University of Geosciences Wuhan
    Three Gorges Research Center for Geohazards, Ministry of Education, China University of Geosciences Wuhan)

  • Ali Polat

    (Center for Global Tectonics, China University of Geosciences Wuhan
    University of Windsor)

  • Songjie Wang

    (Center for Global Tectonics, China University of Geosciences Wuhan
    School of Earth Sciences, China University of Geosciences Wuhan)

  • Xingfu Jiang

    (Center for Global Tectonics, China University of Geosciences Wuhan
    School of Earth Sciences, China University of Geosciences Wuhan)

  • Keqing Zong

    (State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences Wuhan
    School of Earth Sciences, China University of Geosciences Wuhan)

  • Junpeng Wang

    (Center for Global Tectonics, China University of Geosciences Wuhan
    School of Earth Sciences, China University of Geosciences Wuhan)

  • Hao Deng

    (Center for Global Tectonics, China University of Geosciences Wuhan
    School of Earth Sciences, China University of Geosciences Wuhan)

  • Jianmin Fu

    (Center for Global Tectonics, China University of Geosciences Wuhan
    School of Earth Sciences, China University of Geosciences Wuhan)

Abstract

We report partial melting of an ultrahigh pressure eclogite in the Mesozoic Sulu orogen, China. Eclogitic migmatite shows successive stages of initial intragranular and grain boundary melt droplets, which grow into a three-dimensional interconnected intergranular network, then segregate and accumulate in pressure shadow areas and then merge to form melt channels and dikes that transport magma to higher in the lithosphere. Here we show, using zircon U–Pb dating and petrological analyses, that partial melting occurred at 228–219 Myr ago, shortly after peak metamorphism at 230 Myr ago. The melts and residues are complimentarily enriched and depleted in light rare earth element (LREE) compared with the original rock. Partial melting of deeply subducted eclogite is an important process in determining the rheological structure and mechanical behaviour of subducted lithosphere and its rapid exhumation, controlling the flow of deep lithospheric material, and for generation of melts from the upper mantle, potentially contributing to arc magmatism and growth of continental crust.

Suggested Citation

  • Lu Wang & Timothy M. Kusky & Ali Polat & Songjie Wang & Xingfu Jiang & Keqing Zong & Junpeng Wang & Hao Deng & Jianmin Fu, 2014. "Partial melting of deeply subducted eclogite from the Sulu orogen in China," Nature Communications, Nature, vol. 5(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6604
    DOI: 10.1038/ncomms6604
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    Cited by:

    1. Baohua Zhang & Hongzhan Fei & Jianhua Ge & Lingsen Zeng & Qunke Xia, 2022. "Crustal melting in orogenic belts revealed by eclogite thermal properties," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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