Single zircon dating by LAM-ICPMS technique |
| |
Authors: | Haichen Liu Bingquan Zhu Zhanxia Zhang |
| |
Institution: | (1) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Guangzhou, China;(2) Department of Chemistry, Zhongshan University, 510275 Guangzhou, China |
| |
Abstract: | A UV laser ablation microprobe-inductively coupled plasma mass spectrometry (LAMICPMS) is used to determine the Pb/Pb and
Pb/U ages of several zircon grains whose ages have been measured by the conventional U-Pb thermal ionization mass spectrometry
(TIMS) method. The mass fractionation factor of Pb isotope ratio was typically between 0.010-0.012 and corrected by NIST610
glass standard. Several factors that influence the stability of Pb/U ratio have been investigated and optimized. The precision
of207Pb/206Pb and206Pb/238U from each sampling crater is within 0.6%—2.4% and 1%—10% respectively, while the precision for the average of mean ratios
from different craters is 0.7% and 6% correspondingly. The207Pb/206Pb and206Pb/238U age differences compared with TIMS results are ≪ 1% and < 3% respectively. |
| |
Keywords: | laser ablation microprobe ICP-MS zircon geochronology |
本文献已被 SpringerLink 等数据库收录! |
| 点击此处可从《中国科学通报(英文版)》浏览原始摘要信息 |
| 点击此处可从《中国科学通报(英文版)》下载免费的PDF全文 |