Tectonic affinity of the west Qinling terrane (central China)

North China or Yangtze?

J. P. Zheng*, W. L. Griffin, M. Sun, S. Y. O'Reilly, H. F. Zhang, H. W. Zhou, L. Xiao, H. Y. Tang, Z. H. Zhang

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

[33] Neogene (̃14 Ma) basaltic magmatism has occurred in west Qinling, at the northeastern corner of the Tibetan Plateau. Furthermore, U-Pb ages and Hf isotopic data of xenocrystic zircons indicate that the unexposed Neoarchean (2.7-2.5 Ga) basement beneath the Phanerozoic outcrops in west Qinling has affinities with the southern margin of the north China block. The basement has a complex evolution, including the addition of juvenile mantle material at ̃2.7- 2.4 Ga and 1.1-0.8 Ga and reworking at ̃1.8 Ga and possibly at 1.4 Ga. Phanerozoic thermal events at 320-300 Ma, 230 Ma, and 160 Ma also have affected the basement. We interpret the west Qinling orogenic terrane as originally separated from the north China block, joined to the northern Yangtze block during the Meso-Neoproterozoic, and finally involved in the northward subduction and collision of the Yangtze block in the Paleozoic and early Mesozoic and subsequent lithospheric extension in the Jurassic.

Original languageEnglish
Article numberTC2009
Pages (from-to)1-14
Number of pages14
JournalTectonics
Volume29
Issue number1
DOIs
Publication statusPublished - 1 Apr 2010

Bibliographical note

Copyright American Geophysical Union 2010. Originally published as Zheng, J. P., W. L. Griffin, M. Sun, S. Y. O'Reilly, H. F. Zhang, H. W. Zhou, L. Xiao, H. Y. Tang, and Z. H. Zhang (2010), Tectonic affinity of the west Qinling terrane (central China): North China or Yangtze?, Tectonics, 29, TC2009. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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