The effect of relative measured position on zircon SIMS U-Pb dating
文献类型：期刊论文
| 作者 | Ling XiaoXiao2; Li QiuLi1,2; Liu Yu1,2; Tang GuoQiang1,2; Li Jiao2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2019 |
| 卷号 | 35期号:8页码:2615-+ |
| 关键词 | SIMS Zircon U-Pb Age Measured position System bias |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2019.08.17 |
| 英文摘要 | The Secondary Ion Mass Spectrometry (SIMS) is normally considered as the first choice to reveal the age of complicate metamorphic zircon due to its high spatial resolution. It is very common to test the rim and the core of a metamorphic zircon grain at the same analytical session to investigate the metamorphic and protolith age, respectively. In order to evaluate the effect of relative measured position on SIMS U-Pb dating quantitatively, the most homogenous zircon reference material M257 was tested under four different situations: 1) testing U-Pb age of the zircon twice on the same spot, 2) analyzing 0 isotopes firstly and U-Pb dating secondly in the same pit, 3) bombing the up/down/left/right region relative to the first measured position with overlapped pre-sputter area successively, 4) detecting two spots on the same zircon grain with visible distance. The results showed that the depths of the bombardment and the pre-sputter area relative to the first measurement can cause obvious U-Pb data bias ranging from-5% to 11%. The maximum bias is recorded in the rear region relative to the direction of primary ion of the first measured spot with overlapped pre sputter area the rear. Cautions are suggested when setting the relative measured position on the same area. In addition, previous SIMS dating results on metamorphic zircon rims after measuring the zircon core should be re-evaluated. The time span of metamorphism could be extended without evaluation of the relative measured position effect. |
| WOS关键词 | AGE-DETERMINATION ; MASS ; PB-207-PB-206 ; IONIZATION ; ISOTOPES |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000491158400017 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/93882]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Li QiuLi |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ling XiaoXiao,Li QiuLi,Liu Yu,et al. The effect of relative measured position on zircon SIMS U-Pb dating[J]. ACTA PETROLOGICA SINICA,2019,35(8):2615-+. |
| APA | Ling XiaoXiao,Li QiuLi,Liu Yu,Tang GuoQiang,&Li Jiao.(2019).The effect of relative measured position on zircon SIMS U-Pb dating.ACTA PETROLOGICA SINICA,35(8),2615-+. |
| MLA | Ling XiaoXiao,et al."The effect of relative measured position on zircon SIMS U-Pb dating".ACTA PETROLOGICA SINICA 35.8(2019):2615-+. |
入库方式： OAI收割
来源：地质与地球物理研究所
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