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Journal of Earth Science

, Volume 29, Issue 5, pp 1074–1080 | Cite as

Tectonic Boundary and Ceasing Time of Amalgamation between the North China Craton and the North Qinling Belt

  • Jingbo Liu
  • Neng-Song Chen
  • Wen Su
Metamorphism, Magmatism and Tectonic Evolution of Central China Orogenic Belts
  • 35 Downloads

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.

Key Words

Qinling orogenic belt Taowan Group Kuanping Group granitoid zircon age 

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Notes

Acknowledgements

This study was supported by the National Natural Science Foundation of China (No. 41372080). Professor Zhendong You guided the first author to finish his thesis studies on the metamorphism of the Qinling-Dabie orogenic belt, as a master student from 1985 to 1988 and as a PHD student from 1991 to 1994. He is a knowledgeable, gentle and kind teacher. This paper is dedicated to Prof. Zhendong You for his birthday of 90 years old. The final publication is available at Springer via  https://doi.org/10.1007/s12583-018-0847-8.

Supplementary material

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Copyright information

© China University of Geosciences and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Lithospheric Evolution, Institute of Geology and GeophysicsChinese Academy of SciencesBeijingChina
  2. 2.College of Earth and Planetary SciencesUniversity of the Chinese Academy of SciencesBeijingChina
  3. 3.School of Earth Sciences, Center for Global TectonicsChina University of GeosciencesWuhanChina

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