Science in China Series D: Earth Sciences

, Volume 50, Issue 2, pp 172–183 | Cite as

Constraining the stepwise migration of the eastern Tibetan Plateau margin by apatite fission track thermochronology

  • Lai QingZhou 
  • Ding Lin 
  • Wang HongWei 
  • Yue YaHui 
  • Cai FuLong 
Article
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Abstract

Granites sampled from Garzê-Litang thrust, Longmen Shan thrust, Garzê and Litang strike-slip faults in the eastern Tibetan Plateau have been analyzed with apatite fission track thermochronological method in this study. The measured fission track apparent ages, combined with the simulated annealing modeling of the thermal history, have been used to reconstruct the thermal evolutionary histories of the samples and interpret the active history of the thrusts and faults in these areas. Thermal history modeling shows that earlier tectonic cooling occurred in the Garzê-Litang thrust in Miocene (∼20–16 Ma) whereas the later cooling occurred mainly in the Longmen Shan thrust since ∼5 Ma. Our study suggests that the margin of eastern Tibetan Plateau was extended by stages: through strike-slip faults deformations and related thrusts, the upper crust formed the Garzê-Litang margin in the Miocene epoch and then moved to the Longmen Shan margin since ∼5 Ma. During this process, the deformations of different phases in the eastern Tibetan Plateau were absorbed by the thrusts within them and consequently the tectonic events of long-distance slip and extrusion up to hundreds of kilometers have not been found.

Keywords

Tibetan Plateau fission track thermal history modeling margin migration constraining 
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Copyright information

© Science in China Press 2007

Authors and Affiliations

  • Lai QingZhou 
    • 1
    • 2
  • Ding Lin 
    • 2
  • Wang HongWei 
    • 1
  • Yue YaHui 
    • 1
  • Cai FuLong 
    • 1
  1. 1.Institute of Geology and GeophysicsChinese Academy of SciencesBeijingChina
  2. 2.Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijingChina

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