In situ U-Pb dating of titanite by LA-ICPMS
作者: JinFeng SunJinHui YangFuYuan WuLieWen XieYueHeng YangZhiChao LiuXianHua Li
作者单位: 1State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences
2Graduate University of the Chinese Academy of Sciences
刊名: Chinese Science Bulletin, 2012, Vol.57 (20), pp.2506-2516
来源数据库: Springer Journal
DOI: 10.1007/s11434-012-5177-0
关键词: In situ titanite U-Pb datingLA-ICPMSsingle spotline raster scanmatrix effect
英文摘要: Abstract(#br)Titanite is an ideal mineral for U-Pb isotopic dating because of its relatively high U, Th and Pb contents. Here, we developed a technique for U-Pb dating of titanite using the 193 nm ArF laser-ablation system and Agilent 7500a Q-ICP-MS. Standards of titanite (BLR-1 and OLT-1) and zircon (91500 and GJ-1) were dated using single spot and line raster scan analytical methods. To check the matrix effect, titanite (BLR-1) and zircon (91500) standards were analyzed as the external standards. The weighted mean 206 Pb/ 238 U ages of OLT-1 titanite are 1015±5 Ma (2 σ , n =24) and 1017±6 Ma (2 σ , n =24) by single spot and line raster scan analyses, respectively, using BLR-1 titanite as the external standard. These ages are consistent with its reference age of about 1014 Ma. However,...
全文获取路径: Springer  (合作)
影响因子:1.319 (2012)

  • dating 年代测定
  • titanite 榍石