Quaternary Zircon Geochronology by Secondary Ion Mass Spectrometry: A Case Study of the Chinkuashi Dacite from
- 责任者：Gao Yuya (State Key Laboratory of Lithospheric Evolution ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 China) ; Li Xianhua
- 刊名：Earth Science Frontiers
- 出版年：2010
- 卷期：17(2)
- 关键词：次级离子质谱法 ; secondary ion mass spectrometry
- 页码：p.146-155
- 图表：5 illus., 1 table, 42 refs.
- 分类号：1300
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
Precise age determination of geological events throughout the Quaternary period is fundamental for Quaternary studies and paramount for understanding the Earth’s evolution. Large radius secondary ion mass spectrometry (SIMS) has increasingly been used in Quaternary geochronology due to its high-resolution, high- precision, high-efficiency, and non-destructive nature. When applied to U-Pb zircon geochronology the micrometer-scale spatial resolution and high mass resolving power (MRP) of SIMS make it possible to extract complex geologic information preserved within micron-sized minerals that would otherwise be obscured or over- looked using other methods. In this paper, the authors introduce the principles, analytical techniques and correction methods of SIMS in-situ U-Pb dating for Quaternary zircons, and report a SIMS U-Pb zircon age of (1.166+0.020) Ma for the Quaternary Chinkuashi dacite from northeastern Taiwan.