Techniques for Choosing Target Points during SHRIMP Dating of Zircon U-Pb Ages
详细信息
- 责任者：Liu Jianhui (Institute of Geology ; Chinese Academy of Geosciences ; Beijing SHRIMP Center ; Beijing 100037 ; China) ; Liu Dunyi
- 刊名：Rock and Mineral Analysis
- 出版年：2011
- 卷期：30(3)
- 关键词：铀—铅计时 ; U-Pb dating ; SHRIMP定年 ; SHRIMP dating
- 页码：p.265-268
- 图表：4 illus., 11 refs.
- 分类号：1300
- issnNo：ISSN0254-5357
- isbnNo：CN11-2131/TD
摘要
Images of the first two reflect the development of fractures and inclusions. The cathodoluminescence images provide information on genesis and evolution histories of the host rocks. The techniques of choosing target points were summarized for single genesis zircon, core-mantle type zircon and young age single genesis zircon. The photographs of reflected and transmitted light and cathodoluminescence images were used to study the micro-struction and the genesis of zircon before U-Pb dating. The darker area was chosen for single genesis and low U content zircon with young age from cathodoluminescence images in order to obtain smaller error and higher precision dating data.