江西武功山穹隆复式花岗岩的锆石U-Pb年代学研究

Translated title of the contribution: Zircon U-Pb isotopic chronology of the Wugongshan dome compound granite in Jiangxi Province

Fasheng Lou*, Weizhou Shen, Dezi Wang, Liangshu Shu, Fujiang Wu, Fangrong Zhang, Jinhai Yu

*Corresponding author for this work

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

There are many granite plutons in the Wugongshan dome compound granite. Fine U-Pb dating of zircons show that the Shanzhuang granite, Zhangjiafang granite and Wugongshan granite have zircon ages of 460.5± 1.5 Ma, 427.9 ± 1.2 Ma and 428.0 ± 1.0 - 462.3 plusmn; 2.3 Ma respectively, belonging to the late Early Paleozoic. The Yanshan granite, Wentang granite and Mingyueshan granite have zircon ages of 161.0 ± 1.0 Ma, 143.8 ± 1.6 Ma, 126.3 ± 6.4 Ma respectively, belonging to the late Jurassic-early Cretaceous. Therefore, the authors believe that the granite of the Wugongshan dome compound granite is the product of the late Early Paleozoic and late Jurassic-early Cretaceous magmatism. These data can indicate from another angle that there might be late Early Paleozoic tectonic-thermal events and late Jurassic-early Cretaceous tectonic-thermal events, which provides new evidence for the researches of geotectonic evolution of South China. Considering also 40Ar/39Ar dating of muscovite from granitic gneiss (225-233 Ma), these data show that the ductile distortion was formed during the late Triassic which may be the startup of extensional tectonics. The formation and upwelling of late Jurassic-early Cretaceous magmas made the wall rocks softening and partial melting, which help the development of extensional tectonics in wall rocks, and the granitic dome extensional tectonics was finally formed during the Cretaceous in Wugongshan.

Original languageChinese
Pages (from-to)636-644
Number of pages9
JournalActa Geologica Sinica
Volume79
Issue number5
Publication statusPublished - 2005
Externally publishedYes

Keywords

  • Extensional tectonics
  • Granitic dome
  • U-Pb dating of zircon
  • Wugongshan

Fingerprint Dive into the research topics of 'Zircon U-Pb isotopic chronology of the Wugongshan dome compound granite in Jiangxi Province'. Together they form a unique fingerprint.

  • Cite this

    Lou, F., Shen, W., Wang, D., Shu, L., Wu, F., Zhang, F., & Yu, J. (2005). 江西武功山穹隆复式花岗岩的锆石U-Pb年代学研究. Acta Geologica Sinica, 79(5), 636-644.