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J4 ›› 2012, Vol. 18 ›› Issue (1): 28-40.

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An Overview of the Tectonic Evolution of North Qaidam UHPM Belt: from Oceanic Subduction to Continental Collision

ZHANG Guibin, ZHANG Lifei, SONG Shuguang   

  1. MOE Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences,
    Peking University, Beijing 100871, China
  • Received:2011-11-07 Revised:2011-12-06 Online:2012-03-20 Published:2012-03-20
  • Contact: Zhang Guibin, Lecturer; Email: gbzhang@pku.edu.cn
  • About author:Zhang Guibin, Lecturer; Email: gbzhang@pku.edu.cn

Abstract:

        The North Qaidam UHPM belt is a typical continental type subduction zone. Coesite inclusions were found from
eclogite and country gneiss, and diamond inclusion from garnet peridotite. This paper is focused on the progress of petrology,thermobarometry, geochemistry and geochronology studies of Yuka, Luliangshan, Xitieshan and Dulan terranes in the North Qaidam UHPM belt. This belt is unique because subducted oceanic relics prior to the continental subduction and collision are well preserved, Combined with the published data, especially the two protolith sources for eclogites, we conclude that the North Qaidam UHPM belt experienced a tectonic evolution from an oceanic subduction to a continental collision.

Key words: oceanic subduction, continental collision, North Qaidam UHPM belt

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