Science in China Series D: Earth Sciences

, Volume 44, Supplement 1, pp 10–17 | Cite as

The Cenozoic mantle magmatism and motion of lithosphere on the north margin of the Tibetan Plateau

  • Luo Zhaohua 
  • Xiao Xuchang 
  • Cao Yongqing 
  • Mo Xuanxue 
  • Su Shangguo 
  • Deng Jinfu 
  • Zhang Wenhui 


Geodynamic properties and evolution of the lithosphere on the north margin of the Tibetan Plateau are recently hot topics to geoscientists in the world. Have the northern plates been subducting underneath the Plateau? It is still an unsolved problem. One of the keys to solving this problem is to understand the genetic processes of Cenozoic magmas on the north margin of the Tibetan Plateau. However, there is no enough evidence supporting the subduction model. In contrast, a series of evidence indicates that collision-induced huge shearing faults and large-scale crust shortening played a main role in lithosphere motion on the north margin of the Tibetan Plateau. The mantle-derived igneous rocks strictly distribute at the intersections of large strike-slip faults on the north margin of the Plateau. Generation of magmas may be related to local extensional condition induced by strike-slipping faults, which lead to lithosphere gravitational instability and collapse, as well as upwelling of the deep hot material. Heat induced by shearing and carried by upwelling hot material may cause partial melting on H2O-bearing mantle.

Key words

northern margin of Tibetan Plateau magmatism subduction collision strike-slip fault deep-seated xenolith 


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Copyright information

© Science in China Press 2001

Authors and Affiliations

  • Luo Zhaohua 
    • 1
  • Xiao Xuchang 
    • 2
  • Cao Yongqing 
    • 3
  • Mo Xuanxue 
    • 1
  • Su Shangguo 
    • 1
  • Deng Jinfu 
    • 1
  • Zhang Wenhui 
    • 1
  1. 1.China University of GeosciencesBeijingChina
  2. 2.Chinese Academy of Geological SciencesBeijingChina
  3. 3.Deparmment of Earth and Environmental SciencesUniversity of Illinois at ChicagoChicago

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