华南东段早古生代造山带研究

Translated title of the contribution: Early Paleozoic orogenic belt in the eastern segment of South China

Liang Shu Shu*, Jin Hai Yu, Dong Jia, Bo Wang, Wei Zhou Shen, Yue Qiao Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

148 Citations (Scopus)

Abstract

The authors performed a systematic study of the Early Paleozoic belt in the eastern segment of South China, including its sedimentary environment, volcanic rocks, ages of mafic -ultramafic rocks, kinematic analysis of ductile deformation and orogenic mechanism. Results suggest that the Sinian-Ordovician sequence (680-440 Ma) consists chiefly of sandstone and mudstones. In the strata neritic sedimentary structure is well developed, without the Bouma sequence, volcanic lavas or explosive pyroclastic rocks. Some originally defined basalt is actually graywacke. Based on the aforesaid study, combined with the geochemical features of graywacke, the study area was a neritic-bathyal environment on the passive continental margins during the Early Paleozoic. SHRIMP U-Pb zircon dating of some mafic rocks and volcanic rocks show that their ages cluster at 860-800 Ma. The kinematic pattern of ductile deformation indicates that the southeastern foot of the Wuyi Mountains was overthrust from northwest to southeast, while the northern foot was thrust from south to north, displaying a flower-shaped structural style in section. Slightly later, strike-slip shearing occurred. The 40Ar-39Ar dating of muscovite and biotite from mylonitic yielded ages in the range from 430 to 390 Ma. By comparing with the typical Caledonian orogens in the world, the Early Paleozoic South China orogenic belt shows distinct local features and the orogenic mechanism is similar to that of the Pyrenean orogenic belt of Western Europe.

Translated title of the contributionEarly Paleozoic orogenic belt in the eastern segment of South China
Original languageChinese
Pages (from-to)1581-1593
Number of pages13
JournalGeological Bulletin of China
Volume27
Issue number10
Publication statusPublished - Oct 2008
Externally publishedYes

Keywords

  • Early Paleozoic orogenic belt
  • Eastern South China
  • Geochronology
  • Sedimentary environment
  • Structural kinematics
  • Tectonic attribute

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