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Chinese Science Bulletin

, Volume 48, Issue 22, pp 2411–2421 | Cite as

Determination of U-Pb age and rare earth element concentrations of zircons from Cenozoic intrusions in northeastern China by laser ablation ICP-MS

  • Honglin Yuan
  • Fuyuan Wu
  • Shan Gao
  • Xiaoming Liu
  • Ping Xu
  • Deyou Sun
Articles
  • 184 Downloads

Abstract

Using the in situ zircon U-Pb dating method of LA-ICPMS, we analyzed the 31 Ma old SHRIMP U-Pb age of the Yongsheng nepheline syenite from southern Jilin Province under different spot sizes. The obtained ages are comparable with that of SHRIMP in both accuracy and precision. The age is also identical to that of the Yinmawanshan gabbro from the Liaodong Peninsula within error. Both the Yongsheng nepheline syenite and the Yinmawanshan gabbro represent the youngest known exposed intrusions in northeastern and even eastern China. The results indicate the Eocene mantle-derived magmatic underplating, and the rapid crustal uplifting of this region since 30 Ma. The analyses also document extremely high LREE concentrations and relatively flat REE patterns for the zircons from the Yongsheng nepheline syenite, which represent a new type of zircon REE pattern.

Keywords

LA-ICPMS U-Pb dating Cenozoic gabbro syenite zircon 

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Copyright information

© Science in China Press 2003

Authors and Affiliations

  • Honglin Yuan
    • 1
  • Fuyuan Wu
    • 2
  • Shan Gao
    • 1
    • 3
  • Xiaoming Liu
    • 1
  • Ping Xu
    • 2
  • Deyou Sun
    • 4
  1. 1.Department of GeologyNorthwest UniversityXi’anChina
  2. 2.Institute of Geology and GeophysicsChinese Academy of SciencesBeijingChina
  3. 3.Faculty of Earth SciencesChina University of GeosciencesWuhanChina
  4. 4.College of Earth SciencesJilin UniversityChangchunChina

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