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Volume 29 Issue 5
Oct 2018
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Journal of Earth Science  > 2018  >  29(5): 1074-1080.
Jingbo Liu, Neng-Song Chen, Wen Su. Tectonic Boundary and Ceasing Time of Amalgamation be-tween the North China Craton and the North Qinling Belt. Journal of Earth Science, 2018, 29(5): 1074-1080. doi: 10.1007/s12583-018-0847-8
Citation: Jingbo Liu, Neng-Song Chen, Wen Su. Tectonic Boundary and Ceasing Time of Amalgamation be-tween the North China Craton and the North Qinling Belt. Journal of Earth Science, 2018, 29(5): 1074-1080. doi: 10.1007/s12583-018-0847-8
shu

Tectonic Boundary and Ceasing Time of Amalgamation be-tween the North China Craton and the North Qinling Belt

doi: 10.1007/s12583-018-0847-8
  • 1.

    State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

  • 2.

    College of Earth and Planetary Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China

  • 3.

    School of Earth Sciences, Center for Global Tectonics, China University of Geosciences, Wuhan 430074, China

More Information
  • Corresponding author: Jingbo Liu
  • Received Date: 26 May 2018
  • Accepted Date: 27 Jun 2018
  • Publish Date: 01 Oct 2018
    Abstract
  • The Qinling orogenic belt is a composite orogen, consisting of the north and south Qinling belts with different collision ages. The North Qinling belt is composed of several petro-tectonic units, including the Kuanping, Erlangping, Qinling and Danfeng groups with numerous granitoid plutons from Neoproterzoic to Middle Devonian. To the north of the Kuanping Group, a mylonitized granite body in the Luanchuan Group was determined to have the magmatic age of 850 Ma, which is the northernmost Neoprotozoic granite body. The volcanic rocks of the Dahongkou Formation from the Luanchuan Group had the eruptive age of~1 600 Ma, obtained from zircon U-Pb LA-ICP-MS analysis. The detrital zircons in meta-sandstones from the Taowan Group have three populations of~920-1 400, ~1 600-2 100, and >2 200 Ma ages, whereas those from the Kuanping Group shows six populations with the peaks of~590, ~767, ~952, ~1 590, ~2 485, and~3 200 Ma. These data suggest that the boundary between the North China Craton and the North Qinling belt cannot simply be constrained by using the events determined from zircon U-Pb ages. The granitoid plutons with the magmatic age of 430 Ma were strongly deformed, while those with the magmatic age of~390 Ma show no or less deformation, indicating that the deformation of amalgamation between the North China Craton and the North Qinling belt ceased between 390 and 430 Ma.

     

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