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A Comparative Study on the UHP Metamorphic Ophiolitic Rocks in Zermaat-Saas Zone, Western Alps and Western Tianshan, China

ZHANG Li-fei1, LU¨ Zeng1, LI Xu-ping2, Kurt Bucher3   

  1. 1. Key Laboratory of Orogenic Belts and Crustal Evolution, MOE; School of Earth and Space Sciences, Peking University, Beijing 100871, China; 2. College of Geoinformation Science & Engineering, Shandong University of Science and Technology, Qingdao 266510, China; 3. Institute of Mineralogy, University of Freiburg, Alberstrasse 23b,D-79104 Freiburg, Germany
  • Received:2007-09-20 Revised:2007-09-20 Online:2007-09-20 Published:2007-09-20

Abstract: The general geology of ultrahigh pressure(UHP) metamorphic ophiolitic belt in Zermatt-Saas, western Alps, especially the petrologic characteristics and metamorphic evolution, is introduced in this paper. Based on the comparative study of geology, petrology and geochronology between two typical UHP ophiolitic belts in the Zermatt-Saas zone, western and the Chinese Tianshan belt, the general characteristics of UHP ophiolitic belt such as lower geothermal gradient and preservation of pillow lava structure of oceanic basalt are discussed in this paper.