LA-ICP-MS zircon U-Pb ages of the Shijiao-Huangshan intrusive rocks in Zhuji area, Zhejiang Province

implications for the petrogenesis of the ultramafic orbicular rocks

Xiao Lei Wang*, Xu Jie Shu, Guang Fu Xing, Si Wen Xie, Chun Hui Zhang, Han Xia

*Corresponding author for this work

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

LA-ICP-MS zircon U-Pb dating work was carried out for the Shijiao-Huangshan intrusive rocks from Zhuji area of Zhejiang Province, which is also tectonically adjacent to the Jiangshan-Shaoxing fault of eastern Jiangnan orogen. The dating results indicate that the Shijiao amphibole pyroxenite and Huangshan quartz diorites were crystallized at 844 ± 3 Ma and 818 ± 6 Ma, respectively, suggesting that they, including the Shijiao orbicular perknites, were probably formed in different periods. Combined with other new available dating results, the authors hold that the Neoproterozoic diorites along the Jiangshan-Shaoxing fault might have been formed during the span of ca. 930-810 Ma. Further studies of the petrology and petrogenesis of the ultramafic rocks and diorites will shed light on the Neoproterozoic amalgamation processes between the Yangtze and Cathaysia blocks.

Original languageEnglish
Pages (from-to)75-81
Number of pages7
JournalGeological Bulletin of China
Volume31
Issue number1
Publication statusPublished - Jan 2012

Keywords

  • Jiangnan orogen
  • LA-ICP-MS zircon U-Pb dating
  • Neoproterozoic
  • Orbicular rocks
  • Zhuji area

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